Gambia

The Gambia is a republic on the Atlantic coast of West Africa, almost entirely enclosed by Senegal. Its territory is a narrow strip of land that follows the course of the Gambia River, which rises in Guinea and flows westward to the Atlantic Ocean. Its total area is roughly 11,300 square kilometres, which makes it the smallest country on the African mainland. Because its geography is shaped by one river, its settlement pattern, climate, agriculture, transport and water supply all reflect the river's floodplain, mangrove swamps and tidal reaches.

This entry explains the Gambia's geography in a systematic way. It begins with the country's position, borders and dimensions, then covers relief, the river system, coast and estuary, and climate. It moves on to water resources, vegetation and wildlife, and the environmental pressures and climate-change risks that the country faces. The later sections address human geography, including population distribution and the figures on which it depends, administrative and political structures relevant to territory, the economic and transport links tied to geography, and the historical origins of present-day place names and boundaries. The entry closes with the methods used to map and measure the country and with the data gaps that remain.

Location and borders

The Gambia lies on the Atlantic coast of West Africa. The ocean forms its western edge, and Senegal surrounds it on every other side. The land boundary with Senegal is 749 km long, and the Atlantic coastline is 80 km long. Africa's smallest mainland state is the smallest country in mainland Africa, a status that its shape, rather than its population, largely explains.

The present frontiers were fixed in 1889 by an Anglo-French agreement. The two powers had competed for influence in the Senegambia region since the 17th century, when French trade centred on the Senegal River and the Cap-Vert region and English trade on the Gambia River. The 1889 convention set the line at roughly 10 km north and south of the river, reaching inland as far as Yarbutenda, which was the furthest point that sea-going vessels could navigate. The British therefore controlled the river as far as it was navigable by sea-going vessels. Contemporaries regarded the arrangement as provisional, but this border set in 1889 has remained unchanged ever since.

The country's form follows from this settlement. Britain's main interest was the Gambia River and its trade routes, while France held most of the land on either bank. Britain had already established a formal colony on the coast of modern Gambia, threatening nearby French coastal settlements in 1821, and since the French did recognize the British claim to control of the river and its area, the two colonial superpowers opened negotiations about where exactly the boundary between the two would lie. The line was then marked on the ground by a joint commission. When that commission arrived in 1891, it encountered resistance from local rulers, whose land was being divvied up, sometimes right through the middle of an existing kingdom. Many local rulers saw their domains split between the two powers, so the resulting frontier cut across existing communities as well as the landscape.

The strip is also described as very narrow. The country is less than 48 kilometres (30 mi) wide at its greatest width. Its outline therefore reads as a ribbon of land around the river, which runs through the middle of the territory. Because the borders roughly mirror the Gambia River which runs through the middle of the country, most of the frontier with Senegal is defined by the river's course and by the lines drawn parallel to it.

A widely repeated folk account offers a simpler explanation for the width. It holds that the borders of The Gambia region were determined by the British sailing a ship down the river, firing cannons out of both sides, and drawing the borders where the cannon balls landed. Sources that treat the story as a popular account rather than a documented fact note that there is no historical evidence to support the story, and the border was actually delineated using careful surveying methods by the Franco-British boundary commission. Some accounts suggest the legend has a basis in the 1891 episode, when warships were used to enforce the survey. In that episode, British ships bombed the town of Kansala to force the Gambians to back off. A commentary on the myth proposes that it probably arises from the British enforcing their claims by sailing ships down the river and firing on local chieftains, which would link the story to real naval pressure rather than to a precise firing range.

Size, shape and dimensions

The territory is a long, narrow strip whose outline follows the Gambia River, which crosses its centre and gives the country its name. At its broadest point, the strip measures under 48 km across The country is less than 48 kilometres (30 mi) wide at its greatest width. Some popular accounts round this to about 50 km, and the inland eastern section is narrower still. One travel profile puts the width there at about 28 km its width varies between 80km at the Atlantic and about 28km in the inland east.

The length is reported inconsistently because it depends on whether the measurement follows the river's meanders or runs in a straight line. A tourism guide describes the distance inland, along the winding course of the river, as roughly 480 km extending about 480 km inland from the western coast, as it follows the meandering path of The Gambia River. Straight-line east–west figures are lower, with one profile giving about 320 km stretches just 48 kilometers at its widest point but extends 320 kilometers inland and another about 338 km for the east–west extent extending 338 km (210 mi) E – W and 47 km (29 mi) N – S.

Total area is most often given as about 11,295 km². One country profile divides this into total: 11,295 km2 land: 10,000 km2 water: 1,295 km2. The water component consists chiefly of the river channel and its creeks, which widen into tidal arms as they approach the mouth. Other compilations differ slightly. One gives land as 10,120 km² and water as 1,180 km² Of its total area, 10,120 km² is land and 1,180 km² (10.4%) is water., while general encyclopedic entries round the total to 11,300 km².

The country is generally described as the smallest state on the African mainland. The Gambia is almost an enclave of Senegal and is the smallest country on mainland Africa. If island states are included, the picture changes: Seychelles is smaller, and measure just 459 km², making it about 24 times smaller than The Gambia by one comparison.

Its shape sets it apart from compact states of similar size. Dividing its length by its width gives a ratio of roughly six to ten to one, depending on which length is used, so the territory is far more elongated than a compact country of comparable area. Its boundary is also unusually lopsided. The land frontier with Senegal is 749 km long, while the coastline is only 80 km, so the country's sea frontage amounts to roughly a tenth of its border length. Unlike a landlocked state of similar area, it has access to the Atlantic, but nearly all of its overland contact is with a single neighbour. The consequences of this arrangement for the country's estuary and coast are discussed separately, as is the colonial origin of the boundary, which was drawn between the United Kingdom and France in the late nineteenth century.

Relief and landforms

The Gambia has a generally low and flat relief with few pronounced topographic features. According to a UNDP adaptation profile, nearly half of the national land area lies below 20 metres above mean sea level, and about a third is at or below 10 metres. An atlas published by Columbia University gives a similar figure, placing just over 48 per cent of the land below 20 metres and only about 4 per cent above 50 metres. Most of the country's surface therefore sits in a narrow band close to sea level. The commonly cited average elevation of about 34 metres is a summary statistic and says little about this low-lying majority.

The highest point is usually given as Red Rock, at about 53 metres, in the eastern part of the country near the Senegalese border, in the Wuli area of the Upper River Region. The 53-metre figure is widely repeated, but its basis is weak. Wikipedia's geography article traces it to The World Factbook and a 1966 map produced by the United States National Imagery and Mapping Agency, while a point calculated from SRTM radar data by peakbagger.com, on a sandy plateau at the border near the Senegalese village of Vélingara, gives about 64 metres. A 2022 report by The Alkamba Times noted that the exact location of Red Rock remained unknown, and that a tourist visit to Madina and nearby villages did not establish it conclusively. A later web account names Sare Firasu Hill, at roughly 50.9 metres, as the official high point, but this rests on a single non-governmental source, and its own analysis indicates that SRTM-based candidate heights of 59 to 65 metres would need submetre ground measurement to settle the question. The height of the highest point should therefore be read as an approximation.

Beyond the floodplain, the interior is characterised by low relief rather than true hills. The plateau areas consist of weathered tropical soils with low fertility and low water-retention capacity, and they are cut by streams that run down into the lowlands. In the east, the river passes through laterite-capped plateaus, terraces and shallow valleys, and in the central and eastern parts flat-topped laterite sandy hills break up the plateau surface. Named rises such as Mamayungebi Hill, Konkoba Hill, Alligator Rock and Kasang Hill are modest in height. This upland landscape contrasts with the lowlands, where the floodplain of the Gambia River and the tidal plains of the central and lower valley have flat, fine-textured and poorly drained soils.

Seasonal inundation affects a substantial part of the land surface. The UNDP profile estimates that 10 to 20 per cent of the country is flooded seasonally or with the daily tides. Other sources use different definitions and give larger figures. The FAO country profile states that about 20 per cent of the total area is considered wetland, and the Columbia atlas describes a valley bottom covering roughly 39 per cent of the land area, which is subject to regular seasonal flooding. These figures are not directly comparable, because they depend on whether tidal flats, wetlands and permanently saturated soils are counted. The lowlands along the river and its tributaries are also the areas where alluvial sediment has accumulated, and they support rice cultivation and grazing during the dry season.

The low elevation is closely linked to exposure to sea-level rise and flood hazard, particularly along the coast and riverbanks. Where the sandy coastal ridges meet the sea, low dunes and ferruginous sandstone cliffs of no more than about 20 metres occur, but these are small features compared with the wider lowland surface. Flat terrain also means that water moves slowly across the land after heavy rain, so that drainage is often impeded and erosion is concentrated on the few steeper slopes. These characteristics are central to the country's flood and drainage patterns.

The Gambia River

The river rises in the Fouta Djallon highlands of west-central Guinea, at a source about 795 m above sea level. From there it runs northwest into Senegal's Tambacounda Region, passes through Niokolo-Koba National Park, and is joined by the Nieri Ko and the Koulountou before it re-enters the territory of The Gambia at Fatoto. The total course is about 1,120 km, and the basin covers roughly 78,000 km². Its largest tributaries are the Sandougou and the Sofianiama, and many smaller creeks, known locally as bolongs, feed the lower river. The largest of these is Bintang Bolon, which joins from the south.

Below Fatoto the river runs in a generally westward, meandering course with numerous oxbows. About 100 km from its mouth it widens considerably, to more than 10 km where it meets the sea. The mouth is a ria, or drowned estuary, formed when rising sea levels flooded an older river valley. Tidal influence is strong in this lower stretch. Brackish water and mud flats extend roughly 97 km upstream, and the dense mangrove swamps that line the banks reach a similar distance inland. Ocean-going vessels can navigate the river for about 248 km, as far as Kuntaur, while smaller craft can reach Fatoto, about 447 km from the mouth. Roughly half of the river's total length is navigable, and this navigability is the basis of the river's role as the main artery for passenger, freight and mail transport in the country.

The lower river is also studded with islands, which give its middle reach a distinctive character. The best known is Kunta Kinteh Island, formerly James Island (and earlier St Andrew's Island), which lies about 30 km from the mouth near the village of Juffureh. Fort James was built there in the seventeenth century, and the island, together with related sites, is a UNESCO World Heritage Site because of its connection to the trade in enslaved Africans. The island is low-lying and has been eroding; it is now only a fraction of its size during the fort's active period, and waves reach some of the surviving structures at high tide. Dog Island, situated about 13 km from the mouth, is very small, less than 3.5 hectares in area. It is joined to the north bank at low tide and separated from it by roughly 150 m at high tide. Its name is said to derive from the barking-like calls of resident baboons. Further upstream, the Baboon Islands form a chain of river islands within River Gambia National Park, where riparian forest and river channels support primates and other wildlife. Elephant Island is another island in the brackish lower reach.

Across its course, the river's ecological zones change in a broadly predictable sequence. Near the mouth, tidal and brackish waters, mud flats and mangroves dominate, and the many bolongs form a network of channels that serve as fish nurseries and feeding grounds for waterbirds. Farther inland, the water becomes fresh, and the river enters a broad floodplain that floods each rainy season and supports swamp vegetation, rice-growing lowlands and fishing. In the upper reaches, the river flows into more wooded and savanna landscapes, and the dominant ecology shifts from wetland towards the drier country of the interior. These transitions also reflect the river's salinity gradient, since the influence of seawater weakens steadily with distance from the ocean. The sequence explains why the ecosystem of the lower river differs so sharply from that of the middle and upper basin.

Coast, estuary and shoreline

Banjul, the capital, lies where the Gambia River meets the Atlantic. Sources describe its site in two ways. One places it on a sandy peninsula between the mouth of the River Gambia and the Atlantic Ocean, while another says it stands on St. Mary's Island at the mouth of the Gambia River. Either way the ground is low and confined, and the city is dislocated from the Gambian mainland by a maze of mangrove-lined creeks. Its links to the mainland run by passenger and vehicle ferries to the north and bridges to the south.

Seaward of the estuary, the country's coast is short but varied. The open Atlantic shoreline is 80 km long, and brackish water environments extend about 200 km inland along the river. The coastal habitats include rocky/ red cliffs, sandy beaches and dunes, mangrove forests, brackish lagoons, mud flats and living reefs. Tourism is concentrated on the sand strip west of the capital: the beaches at Cape Point, Kotu and Kololi are 15-25 minutes away by road, while quieter stretches lie further south near Gunjur, Sanyang and Kartong . The beaches close to Banjul itself are working spaces, used by fishermen, boat-builders and river-ferry operators. Fishing, tourism and urban settlement therefore share the same narrow band of shoreline, which is one reason the coast carries much of the country's economic activity. Its physical character is also shaped by tourist infrastructure and by urban expansion around Banjul and the Greater Banjul Area.

The estuary is tidal and salty for much of its length. Despite the large volume of fresh water rolled down from the upper reaches, the Lower Gambia is an estuary rather than a river, an inlet of brackish or salt water. Within a single day the coast experiences two flood tides and two ebb tides, and seawater is pushed upstream on the rising tide. Estuarine processes of this kind mean that the lower river never behaves as a purely freshwater system.

Mangrove forests are the defining vegetation of the lower river and the shoreline. They penetrate deep along the Gambia River and its tributaries, typically in zones that begin with tall Rhizophora on the water's edge and give way inland to Avicennia woodland. Ecologically they are productive: they are vital breeding grounds and nurseries for major shellfish and fish species, such as shrimp and barracuda. They also help stabilise the land, since they protect coastlines and riverbanks from erosion by capturing and trapping sediment. Human pressure is considerable. Over the last 15 years, the Gambia's mangrove cover has shrunk at an average rate of 1.5 percent per year, mainly through harvesting of wood for poles and fuel. Some recent rainfall increases have helped Rhizophora recover in places, although this has not reversed the wider decline.

The low-lying coast is exposed to wave action, erosion and saline water at the same time. Scientific assessments identify coastal erosion owing to increased wave activity and physical drowning as the two main climate-related pressures on the coastal zone. The southern shoreline is particularly flat: one study describes a low-lying, 2.5 km wide strand-plain, mostly covered with mangroves and less than 1 m above sea level. Modelling suggests that a one-metre rise could submerge over 50% of Banjul, Barra, and the Banjul Port, and that coastal erosion along the 80 km coastline could harm the vital tourism industry. Salt is also advancing. The estuary already shows saline penetration up to 180 km inland in the wet season and 250 km in the dry season, and salt intrusion has already destroyed many farmlands making a large number of farming households poorer. Because the land is so flat, the same salinity can spread into groundwater and drinking-water sources as well as into surface water.

Climate and seasonal regimes

The Gambia has a tropical climate with a clearly divided year, although references differ on where the seasons begin and end. The rainy season lasts from June to October. The dry season extends from November to May. Some sources narrow the wet period. One guide describes a wet season running from July to September, and another gives the dry season as October to June. The boundaries are therefore best read as approximate.

Temperatures differ between the coast and the interior, and the hottest weather is not always in the wet season. Mean temperatures along the coast rise from about 23°C in January to 27°C in June, while inland they run from about 24°C in January to 32°C in May. The wet season is hot and humid, and temperatures may rise as high as 40°C, though they are usually lower near the sea. The most intense heat tends to come at the end of the dry season, when the harmattan, a dusty wind blowing from the Sahara, pushes interior temperatures above 38°C in March to May. Official figures for the coast give a range from roughly 18°C in the wet season to 32°C in the dry season, which reflects the moderating effect of the sea.

Rainfall is the main variable across the country. Annual rainfall averages about 1,020 mm, but it varies considerably from year to year, from less than 750 mm to more than 1,500 mm. Spatially, the gradient runs from the Atlantic inland. Average annual rainfall ranges from 920 millimeters in the interior to 1,450 millimeters along the coast. Individual stations show the same pattern, with about 1,400 mm of rain a year in Banjul on the coast, and about 1,050 mm in Georgetown in the interior. A regional summary gives comparable figures for the north-west, which receives about 720 mm, against roughly 1,400 mm in the south-east. The average annual rainfall is around 1,400 mm (55 in) in the south east, while it is 720 mm (28 in) in the northwest. Wet-season rain usually comes as showers, often at night and in the morning, and it is not continuous. On average it rains on about twelve days a month during the wet period.

Long-term records point to warming and a drying trend. Since 1960, mean annual temperatures in the Gambia have increased by 1.0 °C, at an average rate of 0.21 °C per decade. Rainfall has also declined. One assessment of 1886 to 1992 found a reduction in rainfall of around 15-20 per cent, and the wet season has been shortened. More recent descriptions note that rainfall has decreased in recent years. Because these records come from different periods and methods, they indicate direction more than precise magnitude.

The seasonal pattern has direct consequences for movement and for settlements along the river. Seasonal flooding can hamper overland travel and reduce the provision of essential services, and roads may become impassable and bridges damaged. Outside major cities, four-wheel drive vehicles are necessary, particularly during the rainy season. Some minor roads become impassable during the rainy season (June to October). Flooding is not confined to the coast. In 2022, heavy rains from 30 to 31 July led to mass flooding across the country. Rains and flooding were also reported in the Upper River Region in early August. According to climate vulnerability reports, over 25 percent of The Gambia's roads lie in flood-prone zones.

Water resources and hydrology

The Gambia's surface water is concentrated in the Gambia River, which flows year-round, but its usefulness for drinking water is limited by salinity. Tidal influence and seasonal rainfall change the river's chemistry along its course. By the end of the long dry season (November to May), salinity can reach 15 g/L in the tidal region near Kemoto, about 60 km from the river mouth, while permanent freshwater below 1 g/L begins near Kuntaur, roughly 250 km upstream. At the end of the wet season and the start of the dry season, freshwater can extend as far as Jasobo, about 120 km from the mouth. Because the salt front moves through roughly a third of the river's length each year, the lower reaches are unsuitable for drinking water for much of the year. Other sources place the freshwater zone differently, so these distances should be read as approximate.

Drinking water comes mainly from underground sources. The river is rarely used for potable supply because of its poor quality, particularly in coastal areas where demand from population centres and tourist facilities is highest. Highly seasonal rainfall and the scarcity of smaller perennial streams mean that most potable water, in both rural and urban areas, is met by groundwater. Boreholes typically reach 35 to 100 m, and the water table lies between about 4 and 50 m below ground in the unconsolidated sediments. Groundwater is generally slightly acidic, and in coastal catchments it is vulnerable to salinisation. Overexploitation of coastal aquifers, combined with climate change and rising sea levels, could increase salinisation and reduce the supply of water that meets drinking-water limits.

River water has other uses. The freshwater reaches are used mainly for irrigation, while wells supply most drinking water. The river also supports fishing and serves as a transport route, and its flow is influenced by tides, evaporation, rainfall and groundwater inflow. Flow varies greatly within the year: at Gouloumbo, monthly discharge has ranged from more than 800 m³/s in the wet season to less than 1 m³/s in the dry season. The country's total renewable water resources are estimated at 8 km³ per year, of which about 3 km³ is produced internally and roughly 5 km³ is inflow from the river entering from Senegal. The national water balance therefore depends heavily on conditions upstream.

The river system is sensitive to both land use and rainfall across the wider basin, which covers about 77,100 km², mostly in Senegal. A 2025 study of the continental reach of the basin found that forest and savanna areas declined by about 20.6 and 4.5 per cent respectively between 1988 and 2002, largely because of agricultural expansion and charcoal production. Rainfall records also show a sharp downward shift around 1970, after which hydrological indicators declined markedly. More recent analysis indicates a shift from dry conditions to wetter phases after 2008, with notable increases in rainfall and discharge variability. Projections for the coming decades point toward lower river flow, with one study estimating a decline in annual streamflow of about 22 per cent by 2050 under a moderate emissions scenario, and the Gambia River Basin is expected to be more affected by climate change than the neighbouring Senegal basin.

Overall, the Gambia's water supply combines abundant but partly saline river water, a heavily used groundwater system, and a basin whose flow depends on rainfall and land management beyond its borders.

Vegetation zones and ecosystems

Vegetation in The Gambia is arranged in belts that follow the river and the gradient from the Atlantic coast to the interior. Salinity, flooding and soil type change steadily across these belts, so each zone supports a different plant community. Several figures below describe the wider drainage basin rather than the national territory, and they should not be read as national totals.

Along the lower river, mangrove forest forms the most distinctive cover. Dense mangrove swamps fringe the lower river for 60 miles (97 km) inland, and the trees often grow above 30 m. The mangrove belt is dominated by species such as Avicennia africana and Rhizophora, and the river supports nearly 111,000 acres (45,000 hectares) of mangrove swamp. Where the water is brackish and the soils are heavily salted, mangroves are the main cover that copes with these conditions. Mangrove stands in this zone also serve as a habitat for birds, which use them for breeding and for wintering. The estuary and its wetlands form a connected system, and the Tanbi Wetland National Park is one example of how the mangroves link the Atlantic coast to the estuary.

Beyond the mangrove belt, the landscape changes character. Freshwater swamps and salt flats on low-lying stretches alternate with dense clumps of small trees and shrubs along the valley. The grass-covered flats known locally as banto faros are periodically inundated by salt water, which makes them unsuitable for cultivation and keeps settlement there sparse. Salinity is also a limiting factor for the mangroves themselves. A study of the Tanbi Wetland National Park links long-term hypersalinity to stunted growth and poor mangrove regeneration. Over the period it examined, mangrove cover fell by 6 per cent while grassland expanded by 56.4 per cent, and the authors recommended planting saplings rather than propagules.

Inland, the vegetation is dominated by Sudanian savanna woodland. The country lies along the boundary of two vegetation types, the Southern Guinea and Sudan Savanna formations. The coastal Southern Guinea type is described as open woodland with tall grasses, while the drier eastern areas carry Sudan savanna. The West Sudanian savanna ecoregion, a broad band of woodland, farmland and grassland, extends across several West African countries including The Gambia. Before the mid-twentieth century, the landscape was extensively wooded, and today vegetation density and diversity increase from east to west and from the drier north toward the wetter south. Much of the inland woodland has been cleared for farming, so the savanna is now a mosaic of woodland patches, cultivated land and open rangeland.

The upper part of the basin reflects the same north–south gradient on a larger scale. The basin spans about 77,000 km² across Guinea, Senegal and The Gambia. The southern part has dense forests, transitioning to savannas and shrub steppes in the north. The source region is different again. The Fouta Djallon massif in Guinea has hardly any forest on the massif apart from some small relatively well-preserved forest reserves, and its upland vegetation is mainly submontane. Niokolo-Koba National Park, across the border in Senegal, lies on the middle river, and the river itself runs through the park. Recent basin-scale analysis reports that forest cover recovered from 32.36 to 36.27% after 2002, which suggests that wetter conditions after 2008 supported regrowth, although the same study also notes land degradation in the north.

Taken together, these belts produce a strong ecological gradient. Mangroves and tidal creeks give way to freshwater floodplain and riverine forest, which in turn merge into savanna woodland and drier steppe. Because the basin contains thousands of species, including over 1,500 plant species, 80 mammal species, 330 bird species, 26 reptile species, and 150 freshwater fish species, the transitions between belts matter for species richness as well as for habitat connectivity. Protecting these transitions is therefore central to the country's biodiversity and to the ecosystem services on which its farming and fishing depend.

Wildlife, protected areas and biodiversity

The wildlife of the Gambia is organised largely around the Gambia River and its tidal creeks. Fish, hippopotamuses, Nile crocodiles and many bird species live in the river channel and its margins. Hippos are found in the River Gambia National Park, and one source describes the species as one of the region's remaining populations. Nile crocodiles appear in the river and its creeks from time to time, and are most often seen basking on the banks in the cooler months of December and January. Crocodiles are legally protected, although conflict with people occasionally occurs near waterways. A small West African dwarf crocodile also lives in the country. The West African manatee, which is rare and highly endangered, is recorded in the mangrove creeks of the lower river, where it is often sighted only with luck.

Bird numbers depend on the source and the area covered. Published totals for the whole country range from about 560 to more than 600 species, and the country is widely regarded as a leading destination for birdwatching. Migratory Palearctic species that winter in the tropics add to the local population. Within the protected areas, the Abuko Nature Reserve, close to the coast, records more than 270 species in a small area, and Kiang West National Park has about 300 checklisted species.

Terrestrial mammals are concentrated in woodland and savanna habitats. The spotted hyena, which is widely described as a national symbol, occurs in the country, along with warthogs, bushbuck, sitatunga, serval, leopards, marsh mongoose, African clawless otters and caracals. Primates are an important feature of the woodlands and riverine forests. In River Gambia National Park the Guinea baboon is by far the most plentiful primate, and red colobus, green vervet and red patas monkeys are also recorded. The park's islands are mostly flat and covered in gallery forest, with some open swamp and savanna.

Protected areas are managed by the Department of Parks and Wildlife Management. The protected list includes seven sites, among them Niumi National Park, Kiang West National Park, River Gambia National Park, Bao Bolong Wetland Reserve, Abuko Nature Reserve, Tanbi Wetland Complex and the Tanji Karinti River Bird Reserve. Together they cover about 38,000 hectares. Kiang West, established as a national park in 1987, is among the most important of these sites. It lies on the south bank of the river and is divided into three sections by the Jarin, Jali and Nganingkoi bolongs (tidal creeks). Its vegetation combines dry deciduous woodland, Guinea savannah, mangrove creeks and tidal flats. Sources give differing area figures, ranging from about 110 to about 115 square kilometres, and this discrepancy should be resolved against official records. River Gambia National Park, by contrast, was gazetted in 1978 and consists of five islands with a combined area of about 585 hectares. One satellite islet provides a nesting site for many thousands of herons, egrets, cormorants and ibises.

Wildlife and tourism are closely linked. Visitors come to Abuko for close-range viewing of primates, reptiles and forest birds along boardwalks, and to Kachikally, where a crocodile pool is mainly valued as a tourist attraction. Boat excursions on the river are a central part of the experience at the Baboon Islands and Bao Bolong. Protecting the river ecosystem therefore supports both the conservation of species and the tourism economy. Habitat disturbance and the proximity of settlements to wildlife areas remain concerns, and the hippopotamus is listed by the IUCN as Vulnerable, which makes continued monitoring of the population important. The Gambia's biodiversity thus depends on the health of the river, its mangrove forests and the wetlands that connect them to the interior.

Land use, land cover and environmental pressure

Land-cover change in the Gambia River basin has been substantial, and the continental reach of the basin (the part that lies outside the estuary) shows the clearest pattern. Forest area fell by 20.57% and savanna by 4.48% between 1988 and 2002, mainly because of agricultural expansion and clearing for charcoal production. Forest and savanna areas decreased by 20.57 and 4.48%, respectively, between 1988 and 2002, largely due to human activities such as agricultural expansion and deforestation for charcoal production. After 2002 the pattern partly reversed. Post-2002, forest cover recovered from 32.36 to 36.27%, coinciding with the wetter conditions after 2008, suggesting that climatic shifts promoted vegetation regrowth. The same study found that agricultural land and bare soil grew from a small base, concentrated in the north and centre, which the authors link to population pressure and climate variability.

National and regional figures from satellite studies point in a consistent direction, though their magnitudes differ. One analysis of nationwide imagery for 2015 to 2019 recorded a fall in forest cover from 2,916.26 km² to 2,839.84 km², a decline of 1.35%, and a shift of about 7.86 km² to bare or sparse land. Forest cover decreased by 1.35%, reducing from 2,916.26 km² in 2015 to 2,839.84 km² in 2019. A study of the southwest, by contrast, reported that forest cover loss tripled between 2003 and 2020 compared to 1985 and 2003 estimates. Such differences reflect the short observation windows, the different image sources, and the classification methods used, and they should be read together rather than as a single trend. The drivers identified in the southwest include climate change (drought resulting in bushfire), illegal timber production, and large-scale firewood collection for domestic use. Population growth is also cited as a factor, since it has led to an increase in the use of forest resources leading to deforestation for agricultural production and urban growth.

Degradation of soils and vegetation is closely tied to these changes. Studies of the basin describe a cycle in which clearing and settlement reduce plant cover and weaken water retention, which in turn increases erosion and periods of very low flow, particularly in the drier north. Human activities such as deforestation, settlement expansion, and population growth exacerbate vegetation loss, soil degradation, and water retention issues, contributing to increased erosion and low-flow periods, particularly in the northern, drier regions. The national land degradation assessment identifies different direct drivers by region. In the North Bank Region these include improper management of soil, salinization, conversion of rangelands to cropland and deforestation and removal of natural vegetation. In the Central River Region the principal drivers are deforestation, overgrazing.

Precipitation in the basin does not follow a single trend, and the evidence is uneven across sub-regions. Records from the Senegalese part of the basin show a clear break in the early 1970s, when the region entered a prolonged dry phase. A study of six stations there found a downward trend marked by a very significant rupture in 1970. Later analyses using a 1994 break point report a partial recovery. One study notes that between the periods 1970–1994 and 1994–2012, rainfall in the basin increased by 13.3% in Tambacounda and 21% in Kédougou. More recent comparisons describe a split pattern: average rainfall in the recent decade rose across the Senegal and Gambia basins, but also a decrease in the southern part of the area. Some of the statistical tests applied to the station series did not detect a significant trend, which means that many of the apparent changes in the south and centre remain uncertain.

The floodplain is central to the local economy, and land-use pressure there has direct consequences for livelihoods. Soils across the floodplain are dominantly Gleysols, which are highly important for agriculture. The area of swamps and mangroves is also significant, and the cultivated share is limited. There are about 104200 ha of swamps, of which 33500 ha are cultivated. Mangroves account for an additional 67000 ha. Expanding cultivation, cutting of vegetation, and degradation of upstream slopes therefore threaten both farming and fishing. The upper basin in Guinea is reported to be badly eroded, which raises concern about sediment and flow reaching the lower river. Remote sensing and GIS tools are the main means of tracking these changes, but the record remains patchy, and a consistent, basin-wide monitoring series is still needed.

Climate change, flooding and adaptation

Because so much of the country sits close to sea level, the Gambia is widely regarded as highly exposed to climate change. Its coastal zone consists of about 80 km of open ocean coast and 200 km of sheltered coast, and both stretches are prone to flooding and erosion. On the ND-GAIN Index's measure of extreme climate vulnerability, the country ranks 151st out of 181 countries. A further assessment finds that the Gambia is among the top twenty countries with the highest multi-hazard Expected Annual Damages relative to GDP, based on work by Koks and colleagues (2019). Because coastal areas are home to over 60 percent of the population, the exposure of the shoreline translates directly into exposure of people, housing and livelihoods.

The most acute threat is sea-level rise. Projections indicate that it could inundate Banjul, its port, groundwater resources and ecosystems. A one-metre rise could submerge more than half of Banjul, Barra and the Banjul port area, which would damage essential infrastructure. One government estimate, cited in a UN fellowship presentation, put the area lost to inundation at about 92 km², roughly half of it on the sheltered coast. Human factors compound the natural exposure. Commercial sand mining, especially at Denton Bridge, which links the capital to the rest of the country, has worsened the situation. The Gambia Ports Authority has estimated that Banjul's port could lose 3% of its revenue each year because of climate-related challenges.

Rising sea levels also push saline water into the river system. Researchers describe the intrusion of saline water further up the River Gambia, combined with a reduction in river water flow. This process, known as saltwater intrusion, affects agricultural land and freshwater supplies. Mangrove ecosystems are experiencing higher salinity as mean sea levels rise. Changes to the hydrological and salinity balance of the estuary can alter fish abundance and distribution. Flooding adds a further pathway for contamination: floodwater inundating settlements can contaminate groundwater through stored household waste and flooded septic tanks. Fishing communities have reported rising salinity, habitat erosion and pollution affecting oyster populations.

Flooding is the most frequent hazard. Rainfall over recent decades has alternated between severe droughts and intense downpours that caused repeated floods. Over the past three decades, at least one disaster has struck the country roughly every two years, and flooding accounts for more than half of these events. The heaviest flooding in decades occurred in July and August 2022, damaging homes and businesses. Approximately 20 percent of the land is flooded each year, reflecting the country's extensive floodplain. Flood waters affect roads and travel, and residents of low-lying settlements describe the rainy season as a period when floods destroy everything. Coastal hazards also include storm surges, which become more frequent when normal hydrodynamic conditions are disrupted.

Policy responses have focused on coordination and budgeting. The National Climate Change Policy of 2016 sets the institutional arrangements for coordination and mainstreaming, and outlines an integrated approach to the problem. Later strategies include the Gambia 2050 Climate Vision and a long-term climate-neutral development strategy aiming for net-zero carbon emissions by 2050. A UNDP workshop on climate-sensitive budgeting emphasised the need to bring climate adaptation into national planning and expenditure. Financing remains a constraint: estimated annual adaptation needs of about USD 45 million are roughly three times the USD 16 million in aid the country receives. The Gambia Ports Authority also reports that it is implementing measures to keep port infrastructure climate-proof, showing that adaptation is being pursued at the institutional level as well as nationally.

Population distribution and settlement pattern

The Gambia's population is concentrated in its western end, where the Atlantic coast meets the lower reaches of the river. The 2024 census, the country's first digital count, was carried out in May and June 2024 and gave a total of 2,422,712 people, with women making up slightly more than half. The census had originally been planned for April 2023 but was postponed because funding for preparatory work, including GIS procurement and mapping, arrived late. Its preliminary results put Brikama Local Government Area at 47.5 per cent of the national total and Kanifing Municipal Council at 15.7 per cent, so the two together hold 63.2 per cent of the population. Basse (10.8 per cent), Kerewan (10.3 per cent), Janjanbureh (6.1 per cent), Kuntaur (4.9 per cent) and Mansakonko (3.7 per cent) account for most of the rest, while Banjul, the smallest district, has about 1.1 per cent.

The largest settlements sit on or near the coast. Banjul, the capital, occupies a small island at the river's mouth, and its city proper recorded 26,461 people in the 2024 census. Its population has fallen in absolute terms since the 1980s, as residents moved to the suburbs, notably into Kanifing, where Serekunda, the largest urban area, is located. Kanifing itself had 379,348 residents in 2024 and is among the most densely populated districts in the country. The wider Greater Banjul Area, which combines the city and the municipality, is the economic and administrative core, and it is also the centre of tourism, with hotels and beach resorts along the Atlantic shore. Brikama, further inland but still in the western region, is the second major urban centre and has grown rapidly through urban migration in recent decades.

Along the river, the population is spread across a chain of towns rather than a single corridor. Farafenni, Soma, Janjanbureh, Basse Santa Su, Kuntaur and Mansa Konko serve as regional hubs for administration, markets and transport. Upriver districts such as Kuntaur and Basse have high proportions of young people, and in the 2024 census nearly half the population of those two areas was under 15. The river towns are generally much smaller than the coastal agglomeration, and many depend on farming and fishing in the floodplain and along the Gambia River.

Census counts show steady, rapid growth. The population was 687,817 at the 1983 census, 1,360,681 in 2003 and 1,857,181 in 2013, and the 2024 figure reflects further increase of roughly 300,000 since 2013. Earlier figures put the urban share at about 53 per cent in 2003, and the national urban profile described rising pressure on services and growing urban poverty as a result. Because the country is small, its settlement pattern reflects the coast's pull on employment, education and healthcare. Estimates published by international databases are higher than the census figure, generally between about 2.5 and 2.8 million, because they project forward from earlier counts and use different assumptions. For this reason the census result of 2,422,712 is the most reliable baseline for the present, and the older estimate of about 1.2 million does not match any census count since independence.

The contrast between the urban west and the rural interior remains the defining feature of settlement. The Greater Banjul Area and the western districts are densely settled and youthful, with dense housing and heavy demand on water, sanitation and transport. The central and eastern river districts are sparsely populated, with densities in some rural districts of only a few dozen people per square kilometre in earlier census data. Growth in the coastal agglomeration, and the continuing movement of people from rural villages, therefore coexists with a large, slowly changing rural population across the rest of the country.

Governance, territory and elections

Structure of national elections

At the national level, voters elect a head of state, the president, and a legislature. The president is elected in a single round by first-past-the-post voting for a five-year term, so no runoff is held and the candidate with the most votes wins. The current constitution dates from 1997, and it is the framework under which the current presidential calendar operates. The legislature is the National Assembly, which has 58 seats. Under the scheme described in the 2022 and 2027 reference entries, 53 members are elected from single-member constituencies by first-past-the-post voting, and the President appoints the remaining five, including the Speaker. Some summaries instead give 48 elected seats and five appointed seats, so the published figures should be checked against official sources before they are reused. The country's arrangements are therefore a presidential system with an elected assembly, in which the executive and the legislature are chosen through separate contests.

Candidacy rules are also set out in the electoral framework. The Chief Electoral Officer has listed the requirements for presidential candidates as Gambian citizenship by birth, a minimum age of 30, and at least a senior secondary school education. The nomination period for presidential candidates was set for 3 to 14 November 2026, with nomination forms to be issued from 21 September.

The 2026–2027 electoral calendar

The Independent Electoral Commission (IEC), chaired by Joseph Colley, announced the 2026–2027 calendar in October 2025. The presidential election is scheduled for 5 December 2026. The National Assembly election is set for 10 April 2027, the councillor elections for 22 May 2027, and the mayoral and chairperson elections for 26 June 2027. The IEC cites Section 43 of the constitution as its mandate to conduct public elections and referenda and to fix election dates in line with electoral law. Before the polls, a supplementary voter registration exercise was scheduled for 1 April to 14 May 2026, to be added to the existing register dating from 2021. The IEC has also reported 27 registered political parties, and it has stated that registration depends on meeting the legal requirements set by the constitution and the Elections Act.

The sequence means that three distinct electoral levels will be decided within about seven months of one another. Local government contests, which are held for mayors, chairpersons and councillors, are separate from the presidential and parliamentary votes, and the 2023 local elections were won largely by the United Democratic Party in the urban areas of Banjul, Brikama and Kanifing, while the National People's Party took most rural contests.

Voting procedures

Voting procedures are distinctive and are described in both official and reference sources. A registered voter must hold a voter's card and present it at the assigned polling station. A polling officer then marks the voter's left forefinger with indelible ink, which prevents repeat voting. Instead of paper ballots, the country uses marbles. Each voter receives a marble and places it into a tube that sits above a sealed drum corresponding to a chosen candidate. Each drum is painted in the colours of the candidate's party and carries the candidate's photograph. The drums are placed in a booth out of the view of officials, which protects the secrecy of the vote, and the insertion of a marble rings a bell to confirm that the vote has been cast. The IEC's own voting guidance follows the same sequence, including the line-through of the voter's serial number on the register.

Political context

The incumbent president, Adama Barrow of the National People's Party, is seeking a third term. Reports note that the 1997 constitution permits this, although the move was not originally expected, and it has attracted criticism inside and outside the country. Constitutional reform has been a recurring question. A draft constitution was rejected by lawmakers in 2020 over a retroactive clause that would have limited the president to two terms, and a second draft that removed the clause was also rejected in July 2025. The United Democratic Party has named Ousainou Darboe as its presidential candidate, and other candidates have also declared, including independent and minor-party contenders. Public polling is limited. One August 2026 poll reported a large undecided share, and the outcome of the presidential contest remains open.

Previous results provide a reference point. In the 2021 presidential election, Barrow received about 53 per cent of the vote. In the 2022 parliamentary election, the National People's Party and the United Democratic Party each won 18 and 15 seats respectively, while independents won 12 seats, and the National Assembly therefore has a substantial number of non-party members.

Economy and resource base linked to geography

The Gambia's economy is small and open, and its geography shapes which sectors dominate. Estimates of each sector's weight differ by source and year. An FAO country summary puts services at roughly two-thirds of output and agriculture at about 18%, describing the farm sector as declining because of erratic rainfall and weak investment. Government-linked material instead places agriculture near 30% of GDP and broader services (tourism, trade, transport and communications) at up to 65%. Both sets of figures point to the same structure: a large service sector, a farm sector that still employs most of the workforce, and a thin manufacturing base.

Tourism is the most visible service and the one most tied to the physical setting, but its size depends on how it is measured. The World Travel & Tourism Council, which counts only direct spending, puts the sector at about 9 to 10 per cent of GDP, whereas official Gambian reporting places tourism above 20 per cent once indirect effects are included. The product rests on the coastal beaches and on the river and floodplain, which support birdlife, wildlife and mangrove scenery. That dependence makes the sector sensitive to shocks: international tourism receipts fell from about US$157 million in 2019 to about US$53 million in 2020. The IMF noted in early 2026 that tourism, alongside construction and agriculture, was helping to drive growth, and real GDP growth was reported at 6.0% in 2024.

Banjul, at the river mouth, is the country's principal maritime gateway. It is the only port managed by the Gambia Ports Authority and handles the bulk of external trade. It serves as the main export point for groundnuts and as a re-export hub for goods bound for inland neighbours. The river is navigable for roughly 300 km and carries barges, but Banjul is the only port able to handle international cargo, and its harbour draft of about 8.5 m limits the size of container and bulk vessels. Analyses of the port have also observed that its public-service management model has weakened its competitiveness against landlord-model ports in Dakar and Conakry in transit and re-export trade. The re-export business has long depended on low import duties and a liberal trade regime.

Agriculture and fisheries remain the livelihood base for most Gambians, even though they generate a smaller share of output than their employment share suggests. Farming is largely rain-fed and subsistence-oriented, and groundnuts dominate cash cropping, accounting for about 60 per cent of domestic exports and a large share of cultivated land. Fishing contributes only about 2 per cent of GDP, yet per-person fish consumption is above the world average, and the sector supports more than 200,000 people, with women forming most of the processors. Catches come from the continental shelf, the exclusive economic zone and the river, and the sector is exposed to over-exploitation and environmental change. The country remains a net food importer, with rice as a staple import.

The small size of the country and its limited natural resources shape the economy at several levels. Mining is confined to materials such as clay, laterite, sand, gravel, silica sand and zircon, and contributes little to output. Manufacturing is around 6 per cent of GDP and mostly agro-based, covering peanut processing, bakeries, a brewery and a tannery. The domestic market is small, so the economy relies on trade, re-exports, tourism and external finance. The river's hydroelectric potential has not yet been tapped through dams. A narrow export base, heavy dependence on imported staples and exposure to a few sectors make the economy sensitive to rainfall, commodity prices and cross-border trade conditions.

Transport, connectivity and river navigation

The Gambia River is the country's principal transport corridor. Because the river splits the territory into a northern and a southern bank, most movement of people, goods and mail either follows its course or crosses it. Accounts of the river's navigability vary: one logistics assessment says ocean-going vessels can reach about 300 km inland, with commercial barges travelling further, while a national-level figure puts the river's inland extent at about 360 km. The Gambia is easily accessible to oceangoing shipping and serves as the main artery for passenger, freight, and mail transport in the country. Access to the sea is possible largely because of the estuary, and the port of Banjul lies on that estuary about 26 miles from the open Atlantic.

The Banjul port has five main berths, with facilities for handling both dry and liquid cargo, but larger vessels can face limits because of their draft, so the port handles mainly medium-sized ships. Cross-river movement relies on a small ferry system. The Gambia Ferry Services Company runs passenger and goods services at several points, and the Banjul and Barra crossing points link the North bank with the Capital City of Banjul, while the Trans-Gambia route serves as a link between northern and southern Senegal. In 2026 a new hybrid vessel, the Barra Ferry, was commissioned as part of the Banjul Port Expansion Project, financed by the African Development Bank; it is designed to carry 1,000 passengers and over 50 vehicles. Ferry service has historically been irregular, and the reliability of crossings remains a recurring public concern.

The most significant change to river crossings came with the Senegambia Bridge. The bridge crosses the river about 10 km south of Farafenni, and it is 1.9 kilometres long and replaces a previously-unreliable vehicle ferry. Before it opened in January 2019, ferry delays at this point could last 10–20 days. The bridge's central span is about 100 metres wide, which keeps the river open to boat traffic. A toll applies to vehicles.

Road transport is the principal means of moving people and freight overland. The Trans-Gambia Highway runs along both sides of the river Gambia, and in Senegal the same route is known as the N4. Its Gambian section is short, only about 25 km, so the country depends heavily on connections through Senegal to reach regional markets and ports. Roads are also vulnerable to the rainy season. From June to October, heavy and frequent rain can cause erosion, potholes and flooding can make some roads impassable, particularly in low-lying areas and rural regions. Secondary roads deteriorate most quickly, and one estimate cited in national reporting holds that over a quarter of the country's roads lie in flood-prone zones. Officials have blamed blocked natural waterways and weak urban planning for flooding on new roads in the Greater Banjul Area.

Overland links to Senegal, which almost entirely surrounds the Gambia, follow a 749 km land border. The main crossings are Karang–Amdallai, the most heavily used route between Dakar and Banjul, and Farafenni–Keur Ayib further upriver. Sources disagree on the total number of crossing points, giving figures of four and eight. Waiting times at the crossings are usually measured in tens of minutes but can extend considerably at peak periods, and the rainy season can also restrict access on some routes. Because the country is so narrow, a traveller or lorry often has to cross a border and then a river, or pass through Senegalese territory, to reach a destination within the Gambia itself.

The present transport pattern has roots in the colonial period. The country has no operating railway today, although small colonial-era lines once existed in Bathurst (now Banjul). The river itself became the main route for moving commodities, especially groundnuts, from the interior to the coast for export. British trading posts were established along the lower and middle river, and the strip of territory that developed along its banks reflected the importance of controlling the river as a trade route. The later boundary agreement between the United Kingdom and France in 1889 fixed the frontier at roughly 10 km from each bank, which left the river as the colony's central axis.

Historical geography and place names

The capital began as a British outpost on St Mary's Island at the river mouth. In 1816 the British purchased St. Mary's Island, site of present-day Banjul, and ordered Captain Alexander Grant to establish a military presence there. Its position was chosen to control the river, and over the next 20 years Bathurst would become one of the West African hubs for British anti-slavery naval activities. The island was obtained through a lease: a treaty with the ruler of Kombo set an annual payment of 103 iron bars. The settlement was named for Henry Bathurst, 3rd Earl Bathurst, then colonial secretary.

Bathurst's role as the seat of government developed later. Sources differ on the date: one gives 1888, when Bathurst officially became the administrative centre of the British colony and protectorate of The Gambia, while another states that in 1889 the town was declared the capital of the newly established Crown Colony and Protectorate of Gambia. After independence, Bathurst was named the nation's capital in 1965. The city was renamed in 1973, and from the 19th century until 24 April 1973, the city was known as Bathurst. One traditional account links the new name to a figure who came to the island after fleeing the attacks of Soumaoro Kante on the Manding region, and says his name later became attached to the island. This account is presented here as a local tradition rather than a documented origin.

The country's name derives from the river. The name "Gambia" is derived from the Mandinka term Kambra/Kambaa, meaning the Gambia River. Portuguese explorers, who reached the region in the 15th century, adopted a variation of this local name, which was later anglicised to Gambia during British colonial rule. Another proposed origin, linked to a Serer drum, is also cited in the sources. Because the name first described the river and the land around it, the region was historically known as Senegambia, which covered both present-day countries. It was not until the late 19th century that a distinct separation between the two countries was made. The boundary was fixed by the Anglo-French agreement in 1889 that formalized its boundaries as a narrow strip along the riverbanks. The definite article was kept after independence, as its first prime minister, Dawda Jawara, specifically requested that the definite article be retained in its official name.

Kunta Kinteh Island, in the river about 30 km from its mouth, has a long record of contested ownership. By 1456 the island had been acquired by Portugal from local rulers and a fort constructed on it. The Dutch briefly held the fort from 1659 until the English captured it in 1661. The English renamed the island James Island and the fort Fort James after James, the Duke of York, later King James II of England. The chartered Royal Adventurers in Africa Company administered the territory, which used it first for the gold and ivory trade, and later in the slave trade. UNESCO inscribed James Island and its associated sites on the World Heritage List in 2003. The Gambian government officially changed the name of "James Island" to "Kunta Kinteh Island" on February 6, 2011. The renaming was intended to honor the memory of Kunta Kinteh as a symbol of all victims of the slave trade and to emphasize the African identity and history of the island.

Other place names changed in the same period. Georgetown became Janjanbureh, and MacCarthy Island was renamed Janjanbureh Island in 1995.

Mapping, measurement and scientific study

Climate in the Gambia is usually described with the Köppen–Geiger scheme. The newest widely used version provides a 1-km grid for 1991–2020, and its classification accuracy, measured against station observations worldwide, ranged from 79.2% to 86.4%. Reference maps of the country for this period describe a hot, rainy season (June to November); cooler, dry season (November to May). The World Bank's country climatology uses a different base: observed data from the Climatic Research Unit at a 0.5º x 0.5º (50km x 50km) resolution. A single cell of that size is about as wide as the country itself, whose greatest width is less than 48 kilometres, so the dataset can describe the national climate only as a broad average. Reanalysis products give a similar picture with different figures. For 1995–2014 the same portal reports an annual mean of about 27.88 °C and roughly 695 mm of precipitation, and it estimates a warming of about 0.2 °C per decade since 1970 (Gambia, The used to experience annual temperature of 27.88 °C and annual precipitation of 694.69 mm during the historical period (1995-2014). Since 1970, temperatures have shifted at a rate of about 0.2 °C per decade).

Elevation data and the highest point

The height of the highest point is a case where the measurement method matters. Red Rock is commonly given as 53 m, but at least 53 m according to The World Factbook and a 1966 map by U.S. National Imagery and Mapping Agency, 64 m based on SRTM data calculated by peakbagger.com. The difference between these two values reflects the age and resolution of the source data: the older map predates modern satellite elevation models, while the SRTM-based figure is derived from radar. The location of Red Rock is also uncertain on the ground. A 2021 report found that several online sources, mainly in the United Kingdom (UK), report that "Red Rock" is the Gambia's highest point, yet the location of the highest hill point was not known before this trip, and local villagers in one area could not identify any specific evidence close to their findings. For these reasons the 53 m figure should be read as an approximation drawn from a single historical map rather than a surveyed measurement.

Hydroclimatic trend studies

Scientific work on the wider river system has increasingly combined rainfall, discharge and land-cover records. A study of the continental reach of the basin examined hydroclimate variables for 1990–2022 and land-use change for 1988, 2002 and 2022, using the Standardized Precipitation-Evapotranspiration Index (SPEI) at 12-month and 24-month scales, along with river discharge at the Simenti station, and it identified a shift from dry conditions to wetter phases post-2008. Results from different gauges do not always agree. In the wider West African river analysis, trends in streamflow are not homogeneous with significant positive trends (at the 5% level) observed at the stations of Simenti and Mako, and significant negative trends observed at the stations of Kedougou, Wassadou amont, and Wassadou aval. Earlier work on the Senegalese part of the basin reported that its hydrological parameters vary over the years and describe a downward trend marked by a very significant rupture in 1970, which shows how the choice of study period can change conclusions. Basin area itself is not fixed across sources: one assessment gives an area of 77,054 km^2, while an encyclopedia entry on the river lists a basin size: 78,000 km2.

Remote sensing and GIS in land-use monitoring

Land-use change in the basin is mainly tracked with satellite imagery. One hydroclimate study notes that Modis-Terra images are used to determine land cover, and another states that the combination of hydro-climatic analysis and remote sensing results can be used to assess the level of climate change. Within these data sets, the 2025 study cited above found that forest cover regressed by 280,360.4 hectares between 2002 and 2022, while savanna was the most dynamic land cover type. The same authors attribute vegetation change mainly to climatic conditions (rainfall and hydrology) and bush fires, and their correlation between precipitation and savanna-to-forest conversion is weak (r = 0.058, p = 0.048). Geographic information systems are used to overlay such classified imagery with rainfall grids, elevation models and river networks, but the outputs inherit the uncertainties of each input layer, including the base topography used for the country's reference maps, which dates from a 2003 survey.

Hydrogeological studies complement these surface-based methods, because groundwater movement and aquifer properties cannot be read from satellite imagery or river gauges. Their results are therefore best combined with climate and land-cover records, though their spatial coverage across the country is uneven.

Open questions and data gaps

The published figures for the country's area and population do not agree, and the differences affect how other statistics should be read. One reference gives a total of 11,295 km², of which 10,000 km² is land and 1,295 km² is water. Geography of the Gambia is cited in the source below. A separate country profile gives about 10,120 km² of land and 1,180 km² of water, a gap of roughly 120 km² in land area alone. total: 11,295 km2 land: 10,000 km2 water: 1,295 km2 Of its total area, 10,120 km² is land and 1,180 km² (10.4%) is water. Reconciling these figures requires stating whether tidal creeks, the river channel and seasonally flooded land are counted as land or water. Density calculations are also affected: one live counter gives 285 per Km², while another profile uses 230 per km².

Population figures show a similar split between recorded and projected values. The 2024 census, which was the country's first digital census, counted 2,422,712 residents. The census had originally been planned for April 2023, but late disbursement of funds affecting preparatory activities such as procurement of GIS technologies and the mapping exercise pushed it into 2024. Projection-based sources give higher numbers for the same period; one database lists 2,759,988 for 2024, and a general geography profile still cites about 2.6M. Because the census and the projections use different base years and methods, comparisons across sources should be made with the date and method in mind.

Groundwater and salinity

The state of groundwater is the least documented part of the water picture. Reports describe falling water levels and reduced water columns in wells and boreholes as recharge has weakened. Tidal processes have been offered as an explanation for salinity patterns in coastal aquifers, but there is no agreement on such salinization mechanism in western Africa. The most detailed forecasting work on the estuary dates from 1993, when researchers combined synthetic rainfall records with a one-dimensional model to estimate how far the 1 ppt salinity level advanced in each year of a long flow record. Saltwater intrusion has therefore not been tracked with the same consistency since then.

Monitoring capacity is also limited. An institutional study reported that a national environmental body had stopped salinity measurements because it lacked equipment. A more recent assessment distributed transects from the estuary to the upstream limit of the saline front on the Gambia River, and its authors argue that permanent transects would enable more scientifically sound long-term monitoring of saline intrusions. Without such a record, it is difficult to determine whether the saline front is moving upstream, how far it reaches into aquifers in the dry season, or how it responds to sea-level rise.

Upstream influences on flow and sediment

Rainfall and upstream land use are the main unknowns for river flow. One study links a decline in annual rainfall between 1950 and 2000 to lower river flow and greater inland penetration of seawater. Upland ecosystems have degraded largely because of intensive cultivation, overgrazing, and soil erosion, and the same sources warn that lowland and riverine wetlands face erosion and sedimentation. However, the material reviewed does not quantify how land-use change in Guinea and Senegal alters river discharge or the sediment load reaching the lower river. Measuring these effects would require long records of flow, sediment and remote-sensing land-cover data across the basin. An older assessment described the river as one of the last aquatic ecosystems in West Africa that has not yet been affected by strong environmental changes and human disturbances, but that characterisation predates much of the recent land-cover change and cannot serve as a current baseline.

Cross-border management

The river rises in Guinea, crosses Senegal and reaches the Atlantic in the Gambia, so the sources on flow, rainfall, sediment and salinity are spread across three national systems. Water quality, irrigation for irrigated rice, fisheries and basin-scale hydrology all depend on data from upstream territories. Future planning for water supply, flood risk and salinity therefore depends on shared datasets, harmonised monitoring and agreed methods, and these are not yet fully consolidated in the available evidence.

References

1. Ever wonder why Africa’s borders appear so strange?aljazeera.com
2. Senegambia Confederationen.wikipedia.org
3. Anglo-French Convention of 1889en.wikipedia.org
4. The Gambia%E2%80%93Senegal borderen.wikipedia.org
5. The True Origin of The Gambia's Bizarre Bordersatlasobscura.com
6. Geography of the Gambiaen.wikipedia.org
7. Gambia, The - AACRAOaacrao.org
8. Notes on The Gambiamattlakeman.org
9. Gambia Colony and Protectorateen.wikipedia.org
10. Gambia Riveren.wikipedia.org
11. About The Gambiauniquefoundationgambia.org
12. Where is The Gambia? Everything You Need to Know. - Travel Tramptravel-tramp.com
13. The Gambia Map - Africa's Smiling Coast & River Nationafricamap.net
14. Location, size, and extent - The Gambia - located, areanationsencyclopedia.com
15. How Big Is Gambia? Size Comparison & Mapmylifeelsewhere.com
16. What is the Smallest Country in Africa? There's More Than One Answer!africafreak.com
17. Landformscolumbia.edu
18. Gambiaadaptation-undp.org
19. The Gambia Map - GIS Geographygisgeography.com
20. The Gambia - Geographyglobalsecurity.org
21. The Saga of Red Rock: Discovering The Tallest Hill In The Gambia? - The Alkamba Timesalkambatimes.com
22. The Gambia Highpointcountryhighpoints.com
23. Red Rock (Gambia) - EverybodyWiki Bios & Wikien.everybodywiki.com
24. GMB gambia cpfao.org
25. Country profileopenknowledge.fao.org
26. Gambia River - Studentskids.britannica.com
27. Gambia Riverbritannica.com
28. Gambia Riversimple.wikipedia.org
29. Gambia Riverworldatlas.com
30. Kunta Kinteh Islanden.wikivoyage.org
31. Kunta Kinteh Islanden.wikipedia.org
32. Dog Island, Gambiaen.wikipedia.org
33. Rivers of Africa: The Gambia Riverblackbirdglobal.org
34. River Gambia National Parken.wikipedia.org
35. Gambia Travel Guide - Gambia Holidays Senegambia to Banjultravelnotes.org
36. Banjul, Gambiaebsco.com
37. Banjul Travel Guide - Discover the best time to go, places to visit and things to do in Banjul, Gambiainsightguides.com
38. Tourism in the Gambiaen.wikipedia.org
39. The Gambiawacaprogram.org
40. Banjul Travel Guideworldtravelguide.net
41. The Impacts of Saline-Water Intrusion on the Lives and Livelihoods of Gambian RiceGrowing Farmersrroij.com
42. Previous PageTable Of ContentsNext Pagefao.org
43. Restoring mangroves for climate-resilient fisheries in the Gambiafao.org
44. ASSESSING AND ADAPTING TO CLIMATE-CHANGE INDUCED SEA-un.org
45. Physical Vulnerability of The Gambia’s Coastline in the Context of Climate Changedoi.org
46. The Gambiagca.org
47. Climategambia.gov.gm
48. Gambia Weatherthomascook.com
49. Blue Green Atlas - The Climate of The Gambiabluegreenatlas.com
50. GAMBIA Climate and Weathertheworldofinfo.com
51. Central River Divisionen.wikipedia.org
52. Climate change in the Gambiaen.wikipedia.org
53. West Coast Division (The Gambia)en.wikipedia.org
54. Gambia, The travel advicetravel.gc.ca
55. Worldtravelguideworldtravelguide.net
56. GMB: Flood - 2022-07 - The Gambia 2022 Floodsgo.ifrc.org
57. Floods, filth across towns & markets - The Pointthepoint.gm
58. Rethinking water resources: Harnessing The Gambia River with pressure-driven membrane processes for sustainable supplyresearchsquare.com
59. Hydrogeology of Gambia - MediaWiki - BGS Earthwiseearthwise.bgs.ac.uk
60. Water quality of The Gambia River: A prospective drinking water supply - ScienceDirectsciencedirect.com
61. Water Action Hubwateractionhub.org
62. (PDF) Monographie hydrologique du fleuve Gambieresearchgate.net
63. www.mdpi.commdpi.com
64. Future Climate Change Impacts on Streamflows of Two Main West Africa River Basins: Senegal and Gambiamdpi.com
65. Assessment of current and future trends in water resources in the Gambia River Basin in a context of climate changeenveurope.springeropen.com
66. Gambia Riverebsco.com
67. REPUBLIC OF THE GAMBIA THE FIFTH (5th ) NATIONAL REPORT TO THEcbd.int
68. Hydroclimatic Trends and Land Use Changes in the Continental Part of the Gambia River Basin: Implications for Water Resourcesdoi.org
69. Fouta - Djalonfeow.org
70. West Sudanian savannaen.wikipedia.org
71. (PDF) Mangrove Vegetation Dynamics of the Tanbi Wetland National Park in The Gambiaresearchgate.net
72. Kiang West National Parken.wikivoyage.org
73. Kiang West National Parken.wikipedia.org
74. Kiang West National Park wildlife location in Gambia, Africawildlifeworldwide.com
75. Kiang West National Park - The Adventure Collectiveapp.advcollective.com
76. Protected Areas in The Gambia KIANG WEST NATIONAL PARKresourcepage.gambia.dk
77. Kiang West National Park, Gambiaaccessgambia.com
78. Wildlife of the Gambiaen.wikipedia.org
79. Information on the protected areas in The Gambiameccnar.gov.gm
80. Gambia Wildlifetravelwithkat.com
81. Wildlife in Gambia - Types of Gambian Animals - A-Z Animalsa-z-animals.com
82. Where To See Animals In The Gambiamy-gambia.com
83. River Gambia National Park - National Parks in Africanationalparks.africa
84. Wildlife In The Gambiagambia.co.uk
85. Wild, dangerous & top 10 animals in Gambia 2026theanimalmap.com
86. (PDF) Assessing the Change of Land Use and Land Cover in the Gambiaacademia.edu
87. Full article: Change detection (1985-2020): Projections on land-use land cover, carbon storage, sequestration, and valuation in Southwestern Gambiatandfonline.com
88. Frontiersfrontiersin.org
89. (PDF) ASSESSING THE CHANGE OF LAND USE AND LAND COVER IN THE GAMBIAresearchgate.net
90. REPUBLIC OF THE GAMBIA The Gambia Land Degradation Neutrality National Reportunccd.int
91. Positive Effect of Climate Change on Water Resources Enhancement in Africa: Case of Gambia River Basin (Senegal)intechopen.com
92. (PDF) Hydrological variability of large rivers in West Africa: gap-filling with Earth observations and daily rainfall-runoff modellingresearchgate.net
93. The West Coastfao.org
94. Climate Change Vulnerabilities and Strategies: The Gambia in: Selected Issues Papers Volume 2024 Issue 005 (2024)elibrary.imf.org
95. The-Gambia-Country-Climate-and-Development-Report-.pdfmofea.gov.gm
96. Climate change could submerge The Gambia’s capitaldialogue.earth
97. ppcr strategic program for climate resilience for gambiacif.org
98. Gambia: Climate change could submerge the capitalpreventionweb.net
99. Gambiaadaptation-undp.org
100. 1 Coastal Adaptation to Coastal Adaptation to Climate Change inun.org
101. Gambia's population rises to 2.4m, Mandinkas highest - The Pointthepoint.gm
102. THE GAMBIA 2024 POPULATION AND HOUSING CENSUSgambia.unfpa.org
103. PRELIMINARY CENSUS RESULTS PUT POPULATION AT 2.4Mstandard.gm
104. UNFPA The Gambiagambia.unfpa.org
105. Gambia: Local Government Areas, Major Cities, Settlements & Agglomeration - Population Statistics, Maps, Charts, Weather and Web Informationcitypopulation.de
106. Banjulen.wikipedia.org
107. Kanifingen.wikipedia.org
108. Population Distribution - 5 Observations - GBoSgbosdata.org
109. Gambia: National Urban Profileunhabitat.org
110. Largest Cities and Towns in The Gambia: A Guideegambia.com
111. Subdivisions of the Gambiaen.wikipedia.org
112. Gambia Population (2026) - Worldometerworldometers.info
113. 2026 presidential election set for Dec 5thepoint.gm
114. 2026 Gambian presidential electionen.wikipedia.org
115. Gambia Sets December 2026 Presidential Election Date - Daily Trustdailytrust.com
116. Gambia sets December 2026 presidential election dateafricaninsider.com
117. IEC Registers Three New Political Parties Ahead of December Pollvoicegambia.com
118. IEC Tightens Verification Rules Ahead of Presidential Nominationsvoicegambia.com
119. IEC Sets December 5, 2026, for Gambia Presidential Electionkerrfatou.com
120. 2027 Gambian parliamentary electionen.wikipedia.org
121. 2022 Gambian parliamentary electionen.wikipedia.org
122. 2023 Gambian local electionsen.wikipedia.org
123. 2021 Gambian presidential electionen.wikipedia.org
124. How to Voteiec.gm
125. Elections in the Gambiaen.wikipedia.org
126. IECiec.gm
127. The Gambia Country Profilegiepa.gm
128. Strong Demand Outlook for Tourismgiepa.gm
129. The Gambia Builds Tourism Growth While Travel Shock Risks Challenge African Destinations - Travel And Tour Worldtravelandtourworld.com
130. Gambia at a glancefao.org
131. Major Ports of Gambiamarineinsight.com
132. The Gambia Transport Sector Diagnostic Study Transport, Urban Developmentafdb.org
133. Economy of the Gambiaen.wikipedia.org
134. In The Gambia, sustainable fishing a lifeline to economy under waterenhancedif.org
135. Gambia Natural Resources: Locations, Discoveries,Export Potential, And Economic Impactnaturalresourceinfo.com
136. The Gambia - Economyglobalsecurity.org
137. Gambia, The (10/02) - State.gov2009-2017.state.gov
138. Gambia Ports - Logistics Capacity Assessments (LCAs)lca.logcluster.org
139. Gambia Ferry Service Co. Ltdgambiaports.gm
140. African Development Bank Backs Sustainable Ferry Transport in The Gambia - fundsforNGOs Newsnews.fundsforngos.org
141. Senegambia bridgeen.wikipedia.org
142. Transport in the Gambiaen.wikipedia.org
143. Export Previewlca.logcluster.org
144. Hybrid green ferry launched on Gambia river - African Reviewafricanreview.com
145. Trans-Gambia Highwayen.wikipedia.org
146. N4 road (Senegal)en.wikipedia.org
147. Minister Defends Flood-Prone Roads, Cites Poor Planning and Blocked Waterwaysgambiaj.com
148. Gambia: Lawmaker Urges Urgent Road Repairs to Promote Agriculture & Rural Development - allAfrica.comallafrica.com
149. Border Crossings Between Gambia And Senegal - Border Crossing Hubbordercrossinghub.com
150. Border Crossings In Gambia - Border Crossing Hubbordercrossinghub.com
151. 2.3.2 Gambia Faraffeni Land Border Crossinglca.logcluster.org
152. How to Travel From Senegal to The Gambia (Including Overland Border Crossings) - Travel Tramptravel-tramp.com
153. Bridge connecting Gambia, Senegal opensafricanews.com
154. Banjul, Gambia (1816- )blackpast.org
155. History of Banjulaccessgambia.com
156. Places - The Gambia Resource Pageresourcepage.gambia.dk
157. History of Banjulkupi.com
158. The Gambiaen.wikipedia.org
159. THE GAMBIA - Encyclopaedia Africanaencyclopaediaafricana.com
160. Gambia River (River) - Overviewstudyguides.com
161. Why Is It Called The Gambia? The Story Behind the Name - BEA ADVENTUROUSbea-adventurous.com
162. Behind The Lens: Kunta Kinteh and Albredamy-gambia.com
163. Kunta Kinteh Island, Gambia - Qiraat Africaqiraatafrican.com
164. List of renamed places in the Gambiaen.wikipedia.org
165. Gambia fights to save Kunta Kinteh Islandcnn.com
166. Kunta Kinteh (James) Island Forttripbucket.com
167. High-resolution (1 km) Köppen-Geiger maps for 1901–2099 based on constrained CMIP6 projectionsnature.com
168. Geography of the Gambiaen.wikipedia.org
169. Gambia, The - Climatology (CRU)climateknowledgeportal.worldbank.org
170. Gambia, The - Country Overviewclimateknowledgeportal.worldbank.org
171. Geography of the Gambiaen.wikipedia.org
172. 1 CLIMATE VULNERABILITY AND WATER RESOURCES VARIABILITY IN WEST AFRICAaquaknow.jrc.ec.europa.eu
173. Where Is Gambia? Continent, Location, Borders & Geographygeneratecountry.com
174. Improving Water Availability in The Gambia's Rural and ...thegef.org
175. (PDF) The Impacts of Saline-Water Intrusion on the Lives and Livelihoods of Gambian Rice-Growing Farmersresearchgate.net
176. 5-Saltwater-Intrusion-Impact-Assessment-.pdfnea.gm
177. Vulnerability of two estuaries to flooding and salinity intrusionresearchgate.net
178. Salinity-intrusion forecasting system for gambia river estuary - University of Arizonaexperts.arizona.edu
179. (PDF) Institutional Adaptation to Saline-water Intrusion: A Case Study of The Gambiaresearchgate.net