Same-sex Marriage

Same-sex marriage is marriage between two people of the same sex. Where legally recognized, it establishes a marital relationship with rights and responsibilities governed by the applicable law. It is distinct from civil unions, registered partnerships, and informal cohabitation, although these arrangements may provide some comparable protections. Its legal significance includes questions of inheritance, property, financial support, and recognition of family relationships. (government.nl)

The Netherlands became the first country to legalize same-sex marriage nationwide, with the law taking effect on April 1, 2001. Recognition subsequently expanded through legislation and judicial decisions in other jurisdictions, including the United States Supreme Court’s 2015 decision in <i>Obergefell v. Hodges</i> and Thailand’s marriage-law amendments, effective January 23, 2025. The history of same-sex marriage therefore intersects with changes in family law, constitutional interpretation, and the legal treatment of same-sex couples. (pewresearch.org)

Legal access to marriage, recognition of marriages performed elsewhere, and religious solemnization are separate questions. International and regional decisions may require particular protections without requiring every jurisdiction to permit same-sex marriage domestically. An account of the subject must consequently distinguish legal systems and dates while examining marital rights, parenthood, religious institutions, public attitudes, and demographic evidence. (coe.int)

Definition, terminology, and related forms of union

Same-sex marriage is a marital relationship between two people of the same sex. In legal and administrative contexts, “same-sex” ordinarily describes the spouses’ sex classifications under the applicable law or registration system; it does not establish either person’s sexual orientation. Sexual identity, attraction, and the sex of a partner are distinct characteristics: a spouse in a same-sex marriage may, for example, identify as bisexual rather than gay or lesbian. The Office for National Statistics explicitly distinguishes these dimensions when explaining its sexual-orientation data. The Dutch government similarly describes eligibility for marriage in terms of two men or two women, rather than requiring a particular sexual identity. (ons.gov.uk)

“Same-sex marriage,” “same-gender marriage,” and “gay marriage” are overlapping expressions, but their wording emphasizes different characteristics. “Same-gender marriage” refers to gender rather than sex, while “gay marriage” is a less precise shorthand because it can imply an identity that neither spouse necessarily uses. “Marriage equality” usually denotes the principle, policy, or legal condition of equal access to marriage for same-sex and different-sex couples, rather than a particular marital relationship. It is therefore not an exact synonym: a couple enters a marriage, whereas a jurisdiction introduces or guarantees marriage equality. Terminology also reflects speakers’ institutional purposes; the advocacy organization GLAAD recommends “marriage,” “marriage for same-sex couples,” or “marriage equality” in its media guidance. (en.wikipedia.org)

Registered partnerships and civil unions are legally constituted relationship statuses distinct from marriage, even when their domestic consequences closely resemble it. Their names do not identify a uniform international package of rights. In the Netherlands, official guidance describes marriage and registered partnership as having similar legal consequences and distinguishes both from contractual cohabitation. Eligibility need not be restricted to same-sex couples: the British government’s comparison published on December 10, 2019, covers marriage and civil partnership for both same-sex and opposite-sex couples in England and Wales. Such statuses can carry statutory inheritance rights, financial responsibilities, and tax treatment without making the partners legally married. (government.nl)

Domestic partnership likewise requires a jurisdiction-specific definition. California’s registered domestic partners generally have the same rights, protections, benefits, and responsibilities as spouses under state law. Effective January 1, 2020, registration became available to eligible couples regardless of whether they were same-sex or opposite-sex, removing the previous age restriction affecting opposite-sex applicants. Nevertheless, the United States Internal Revenue Service does not treat a domestic partnership or civil union that is not legally a marriage as marriage for federal tax purposes; its members cannot use married-filing-jointly or married-filing-separately status solely because of that partnership. Substantial equivalence under one body of law therefore does not erase the distinction between statuses under another. (sos.ca.gov)

A cohabitation agreement is instead an instrument of contract law arranging specified aspects of living together, rather than itself conferring marital status. Dutch official guidance identifies agreements about possessions and shared costs as examples; a notarized agreement may also be required for access to certain partner-pension arrangements. Civil marital status must also be distinguished from a wedding ceremony and from religious recognition. A ceremony may create a legally valid marriage when statutory requirements are met, but a religious blessing can be a separate act. In England and Wales, official guidance distinguishes civil weddings, legally recognized religious weddings, and blessings following civil ceremonies; it also distinguishes marriage vows from the signing procedure used to form a civil partnership. Legal recognition and religious solemnization are thus related but separate questions. (government.nl)

Historical development and early legal recognition

Premodern ceremonies joining people of the same sex require interpretation within their own institutions of kinship, religion, and law. Byzantine adelphopoiesis, or “brother-making,” joined two men through a priest’s prayers and blessing. Claudia Rapp’s 1997 study situated this practice within networks of ritual brotherhood documented in historical narratives, saints’ lives, and secular and ecclesiastical regulations. John Boswell’s Same-Sex Unions in Pre-Modern Europe (1994) had interpreted such ceremonies as evidence of institutionally recognized same-sex unions. Specialist criticism disputed their identification with marriage, including claims about shared wedding gestures and liturgical elements. The documented existence of a formal bond between men therefore does not, by itself, establish either an erotic relationship or a counterpart to modern civil marriage. (cambridge.org)

Modern demands for marriage recognition took an explicitly administrative and legal form. On May 18, 1970, Jack Baker and Michael McConnell applied for a marriage licence in Hennepin County, Minnesota, arguing that the state’s marriage statutes did not expressly prohibit two men from marrying. County clerk Gerald Nelson refused the licence, and the couple challenged that refusal in Baker v. Nelson. The Minnesota Supreme Court rejected their claim on October 15, 1971; on October 10, 1972, the United States Supreme Court dismissed their appeal “for want of a substantial federal question.” This litigation made access to an existing civil status—not merely permission to hold a ceremony—the object of the claim. Marriage was nevertheless not a unified priority among contemporary gay activists, some of whom emphasized liberation from established social institutions instead. (mnhs.org)

Denmark introduced the first national registered-partnership framework for same-sex couples in 1989. Act No. 372, dated June 7, 1989, entered into force on October 1 that year. Rather than opening marriage itself, it created a separate status for two people of the same sex. Its central mechanism was incorporation by reference: section 3 generally gave registration the legal effects of marriage and applied provisions concerning marriage and spouses correspondingly to registered partners. Marriage-law provisions also governed eligibility and dissolution, subject to specified modifications. Under the original eligibility rule, at least one partner had to be both resident in Denmark and a Danish citizen. The statute did not initially apply to Greenland or the Faroe Islands, although it permitted later extension by royal order. (blogs.loc.gov)

The Danish framework’s exceptions were important to its institutional design. Rules allowing spouses to adopt did not extend to registered partners; specified provisions concerning married couples’ parental authority were also excluded. Provisions assigning consequences according to a spouse’s sex did not apply, and international treaty provisions extended to partnerships only with the agreement of the other contracting parties. Registration thus conferred a broad package of marital consequences without making partnership identical to marriage. Denmark subsequently opened marriage through legislation in 2012 and allowed existing partners to convert their status, a later change distinct from the recognition introduced in 1989. (retsinformation.dk)

In the Netherlands, legal advocacy and parliamentary initiatives preceded the opening of marriage: lawyer Jan Wolter Wabeke began campaigning in 1987, and parliamentarian Boris Dittrich proposed opening marriage in 1994. The resulting Wet openstelling huwelijk, dated December 21, 2000, amended Book 1 of the Civil Code rather than creating a separate same-sex marital institution. Enactment, publication, and commencement occurred on different dates: the act was published on January 11, 2001, while a royal decree of March 20 fixed its commencement at April 1, 2001. On that date the Netherlands became the first country to open civil marriage nationally to same-sex couples. Immediately after midnight, Amsterdam mayor Job Cohen solemnized four marriages at city hall, involving three male couples and one female couple. These ceremonies marked the first exercise of access under the new law, not its enactment. (amsterdam.nl)

Geographic distribution and categories of legal status

A jurisdictional snapshot dated June 2, 2025 distinguishes access to domestic marriage from registration of foreign marriages, non-marital partnership recognition, and absence of a national marital or partnership status. The domestic-marriage entries below cover 38 country-level jurisdictions, counting Taiwan separately and treating Nepal’s provisional arrangements as a distinct category. Territories and constituent jurisdictions are not additional sovereign-state entries; examples in the other categories are illustrative rather than exhaustive. (pewresearch.org)

Commencement dates determine when a jurisdiction enters the domestic-access category. Taiwan’s implementing legislation passed on May 17, 2019, was promulgated on May 22, and took effect on May 24, 2019, when marriage registration opened. Liechtenstein opened marriage on January 1, 2025. Thailand’s amendments were published on September 24, 2024, but registration began only on January 23, 2025, after the statutory waiting period. Thai authorities specified access at district offices nationwide and at Thai embassies overseas. Legislative approval alone therefore does not establish an operational registration date. (english.ey.gov.tw)

Country-level totals also conceal territorial differences and staggered implementation. Within the United Kingdom, marriage opened in England and Wales and in Scotland in 2014, but in Northern Ireland in 2020; these are not four additional sovereign states. Aruba and Curaçao require separate jurisdictional treatment within the Kingdom of the Netherlands: on July 12, 2024, the Dutch Supreme Court upheld judgments opening marriage there. A country’s entry in an international table should consequently not be read as evidence that every associated territory changed its law simultaneously. (pewresearch.org)

Nepal illustrates why international totals depend on classification. Following the Supreme Court’s interim order, Surendra Pandey and Maya Gurung registered their marriage on November 29, 2023. A Ministry of Home Affairs circular dated April 27, 2024 instructed local administrations to maintain temporary records of same-sex marriages. Pew Research Center’s June 2025 table included Nepal among 39 places permitting marriage, while noting that a marriage-equality law had not been enacted. Separating Nepal yields the 38 ordinary-framework entries above; including it yields 39. Neither figure includes territories as additional country-level entries. (ilgaasia.org)

Recognition categories describe legal mechanisms, not interchangeable degrees of marital status. In Israel, Ben-Ari v. Director of Population Administration required officials to register five couples married in Canada, without settling every question of marriage validity. Italy’s foreign-marriage registration instead gives qualifying certificates the effects of a civil partnership. These distinctions prevent foreign recognition from being counted automatically as domestic access to marriage, just as temporary registration must be distinguished from enacted legislation in force. (larc.cardozo.yu.edu)

Legislative, constitutional, and judicial routes

Thailand opened marriage through amendments to its existing Civil and Commercial Code, rather than through a separate relationship status. The legislation changed more than 60 sections, replacing sex-specific language with terms such as “spouse” and extending the code’s marriage framework to same-sex couples. The House of Representatives approved the bill on March 27, 2024, and the Senate on June 18, 2024. Following royal endorsement, publication in the Royal Gazette on September 24, 2024, began the statutory 120-day waiting period; marriage registration became available on January 23, 2025. Parliamentary approval, promulgation, and commencement were therefore distinct stages: passage alone did not authorize registrars to accept applications. (loc.gov)

Taiwan instead enacted a separate statute following judicial review. In Interpretation No. 748, issued on May 24, 2017, the Judicial Yuan considered petitions from Chi Chia-wei and the Taipei City Government concerning the Civil Code’s exclusion of same-sex couples. It held that the marriage chapter’s failure to permit two people of the same sex to establish a permanent, intimate, exclusive union for a shared life violated freedom of marriage under Article 22 of the Constitution and equality under Article 7. The ruling left the choice between amending existing legislation and adopting a new law to the responsible authorities, but required action within two years. It also supplied a fallback remedy: if that deadline passed without legislation, couples could obtain marriage registration under the existing marriage chapter by submitting a written document signed by at least two witnesses. (cons.judicial.gov.tw)

The resulting Act for Implementation of J.Y. Interpretation No. 748 was promulgated on May 22, 2019, and entered into force on May 24, 2019. Unlike Thailand’s code amendments, it establishes the same-sex union in its own Article 2 and expressly provides for marriage registration in Article 4. Its architecture combines separate provisions with incorporation of existing rules: Article 15 applies the Civil Code’s matrimonial-property provisions mutatis mutandis, meaning with the necessary adaptations, while Article 24 extends provisions concerning spouses and marriage in other legislation, subject to stated exceptions. Article 25 places disputes within the Family Act’s procedural framework. The separate statutory route thus made registration available without rewriting the Civil Code’s marriage chapter, while using cross-references to connect the new framework to existing family law. (mojlaw.moj.gov.tw)

In the United States, Obergefell v. Hodges, decided on June 26, 2015, imposed constitutional requirements on state marriage systems. The cases arose in Michigan, Kentucky, Ohio, and Tennessee; federal district courts had ruled for the couples, but the Sixth Circuit reversed. By a 5–4 vote, the Supreme Court held that the Fourteenth Amendment requires states both to license marriages between two people of the same sex and to recognize such marriages lawfully licensed and performed in another state. Justice Anthony Kennedy’s majority opinion rested on the Due Process and Equal Protection Clauses. Chief Justice John Roberts and Justices Antonin Scalia, Clarence Thomas, and Samuel Alito each wrote dissenting opinions; their objections, including arguments about judicial authority and democratic decision-making, were not the Court’s holding. Under federalism, the judgment constrained state eligibility and recognition rules without replacing state marriage administration with a federal licensing system. (supremecourt.gov)

Implementation also required administrative preparation below the level of statutes and constitutional judgments. In Taiwan, Article 4 identified household-registration authorities as the offices responsible for giving the statutory union legal effect. Thailand’s government announced before commencement that all 50 Bangkok district offices and districts elsewhere were ready to register same-sex marriages from January 23, 2025. These arrangements identify the officials who receive applications and the date on which they may act; Taiwan’s incorporation clauses additionally specify how existing legal rules apply to the new statutory framework. (mojlaw.moj.gov.tw)

Entry into marriage, registration, and dissolution

Eligibility rules concern age, consent, kinship, and existing marital status, but their precise scope varies. In Denmark, both partners must be at least 18, unmarried, and outside prohibited close relationships; a previously married applicant must establish that the earlier marriage ended. In Taiwan, Articles 3–7 of the Act for Implementation of J.Y. Interpretation No. 748 likewise set a minimum age of 18 and prohibit simultaneous marriages or unions. Its kinship restrictions expressly include lineal relatives and collateral blood relatives within the fourth degree, subject to an adoption exception. Lack of proper consent, including coercion, can support annulment in England and Wales. Nationality and residence impose additional territorial conditions: for a wedding at Liechtenstein’s Civil Registry Office, at least one partner must be a Liechtenstein citizen or a foreign national residing there. (familieretshuset.dk)

Formalities distinguish legal formation from optional wedding practices. Taiwan’s Article 4 requires a written agreement signed by at least two witnesses and marriage registration at the household administration authority; it does not prescribe a religious officiant or wedding celebration. In England and Wales, the ordinary civil procedure requires notice at least 29 days before the ceremony, normally after seven days’ residence in the registration district. Applicants provide original identity and address documents and, where applicable, evidence that an earlier marriage ended. The ceremony requires vows, at least two witnesses, and a registrar conducting or attending it. The spouses, witnesses, and registrar sign a marriage schedule, which is subsequently entered in the register; readings and music are optional rather than constitutive requirements. (mojlaw.moj.gov.tw)

Conversion provisions determine whether an existing registered partnership continues unchanged or becomes a marriage. Denmark opened marriage to same-sex couples on June 15, 2012, while ending new domestic partnership registrations and preserving existing partnerships. A partnership formed in Denmark can be converted with both partners’ agreement by application to the municipality where it was registered. The municipality issues a marriage certificate bearing the original partnership-registration date as the marriage date. Liechtenstein, whose marriage reform took effect on January 1, 2025, also permits existing partners to retain their status or convert, with or without a ceremony. Its administrative rules distinguish partnerships established before 2025 from foreign partnerships established afterward: the latter can provide the basis for a subsequent marriage but do not follow the same conversion route. (borger.dk)

Annulment addresses defects in a marriage’s formation, whereas divorce terminates an existing marriage. In England and Wales, prohibited relationships and an existing marriage or civil partnership can make a marriage void; defective consent can make it voidable. Non-consummation, however, is expressly unavailable as an annulment ground for same-sex spouses. Taiwan’s separate statute specifies invalidity and annulment rules and applies designated Civil Code provisions to their consequences. It also permits consensual termination through a written instrument signed by at least two witnesses and registered with the household administration authority, alongside judicial termination and dissolution through court mediation or settlement. (gov.uk)

Jurisdiction to dissolve a marriage need not follow jurisdiction to celebrate it. Canada ordinarily requires either spouse to have lived in the relevant province or territory for the year immediately preceding a divorce application. Section 7 of its Civil Marriage Act supplies a separate route for certain non-resident spouses married in Canada: neither may reside in Canada, they must have lived apart for at least one year, and each must have spent the preceding year residing in a state unable to grant divorce because it does not recognize their marriage. The application goes to a court in the province of celebration. This special proceeding ends marital status without determining support or property division. (justice.gc.ca)

Financial consequences may use ordinary matrimonial rules even where formation and dissolution are governed separately. Taiwan’s Articles 15 and 19 incorporate Civil Code provisions governing matrimonial property and, after termination, alimony and recovery of property. In England and Wales, separating spouses use the general financial-settlement framework: an agreed division requires court approval to become legally binding, and a court can order maintenance toward a former spouse’s living costs. Dissolution therefore involves distinct questions of marital status, division of assets, and continuing support rather than a single automatic settlement. (mojlaw.moj.gov.tw)

Spousal rights and responsibilities

Marital property rights depend on the applicable property regime, not simply on access to marriage. In the Netherlands, marriages contracted from January 1, 2018 generally fall under limited community of property unless spouses make different arrangements through a notarized marriage contract. Property and debts held individually before marriage generally remain separate, as do gifts and inheritances; assets and debts acquired during marriage generally enter the community. Earlier marriages without a prenuptial agreement ordinarily remain subject to the former general-community regime. These distinctions determine which assets belong individually to a spouse and which belong to the marital community. (government.nl)

Taiwan specifies financial duties through the Act for Implementation of J.Y. Interpretation No. 748, effective May 24, 2019. Article 15 applies the Civil Code’s matrimonial-property rules to same-sex spouses. Article 13 makes each spouse the other’s agent for ordinary household matters, while Article 14 allocates household expenses according to financial capacity, domestic labour, and other circumstances, unless law or agreement provides otherwise; both spouses are jointly liable for those expenses. Article 22 separately establishes mutual support obligations. Thus, marital status creates enforceable responsibilities as well as benefits, without requiring equal cash contributions irrespective of the spouses’ circumstances. (ey.gov.tw)

Inheritance and survivor benefits operate through different legal mechanisms. Taiwan’s Article 23 makes each spouse the other’s statutory successor and applies the Civil Code’s succession provisions, establishing inheritance rights without requiring a will naming the spouse. Pension benefits, by contrast, depend on the governing scheme and its beneficiary rules. United States IRS Notice 2014-19 required tax-qualified retirement plans to recognize same-sex spouses from June 26, 2013, subject to transitional recognition rules. In plans subject to qualified joint-and-survivor-annuity requirements, the normal payment form protects the surviving spouse, and choosing another form generally requires spousal consent. Beneficiary designation therefore operates within statutory protections rather than necessarily overriding them. (ey.gov.tw)

For federal taxation in the United States, Revenue Ruling 2013-17, applied prospectively from September 16, 2013, recognized lawful same-sex marriages regardless of the couple’s state of residence. Recognition covered married filing status, personal and dependency exemptions then applicable, employee benefits, and estate and gift taxes. It did not extend marital treatment to civil unions or domestic partnerships that were not legally marriages. Employment and insurance protections involved additional rules: a Department of Labor rule announced in February 2015 extended spousal family-and-medical-leave recognition regardless of residence, while federal Marketplace guidance states that insurers offering coverage to different-sex spouses must also offer it to same-sex spouses. These provisions establish equal treatment within particular programmes, not unconditional eligibility for every benefit. (home.treasury.gov)

Recognition as a spouse or next of kin also differs from authority to make decisions. U.S. Department of Health and Human Services guidance, reviewed March 5, 2025, treats lawful same-sex spouses as family members under the HIPAA Privacy Rule, including for permitted disclosures concerning care or notification of death. Authority to act as a patient’s personal representative generally depends on applicable state law. Where that law gives spouses health-care decision-making authority, covered institutions must recognize a lawful same-sex spouse on the same basis. Marriage therefore does not itself create a uniform nationwide power to make every medical decision. (hhs.gov)

Equal access to marital status must consequently be distinguished from the treatment of marriage throughout associated legislation. Taiwan’s Article 24 applies other laws concerning spouses and marriage by corresponding application, but expressly allows exclusions in the Act or other specific provisions. Thailand instead amended its Civil and Commercial Code, replacing gender-specific marital terminology with “spouse” across more than 60 provisions. Effective January 23, 2025, the amendments extended the existing framework for marital assets, inheritance, and spousal obligations to same-sex couples; the Law Library of Congress also identified consequences for employment-related health insurance and retirement pensions. These are distinct legislative mechanisms for connecting marital status to substantive rights and duties. (ey.gov.tw)

Parenthood, adoption, and legal family relationships

Recognition of a marriage and recognition of a parent–child relationship are separate legal questions. Joint adoption establishes both applicants as parents; adoption of a spouse’s child establishes parenthood for the adopting spouse; recognition of an existing relationship concerns parenthood already acquired through birth, acknowledgement, adoption, or another legally prescribed route. Taiwan illustrates how these rules can change independently: its marriage framework, effective on May 24, 2019, initially permitted adoption of a spouse’s biological child, but not joint adoption of an unrelated child. An amendment to Article 20, promulgated on June 9, 2023, extended the Civil Code’s adoption provisions to joint adoption and adoption of a spouse’s child without the previous biological-child restriction. Eligibility does not itself establish parenthood: adoption remains subject to assessment and judicial approval, including consideration of the child’s best interests. (moj.gov.tw)

In the Netherlands, provisions effective from April 1, 2014, allow the birth mother’s female partner, termed a duomoeder, to become a legal parent without adoption proceedings. Automatic parenthood at birth requires that the women be married or registered partners and that conception involve a donor whose identity is unknown to the birth mother under the statutory donor-information system. When registering the birth, the couple must submit the required declaration from the donor-information authority. Where the donor is known, marriage alone does not establish the partner’s parenthood: she may acknowledge the child before or after birth, provided the legal requirements are satisfied. Prenatal acknowledgement takes effect at birth. The automatic-parenthood rule does not apply retrospectively to children born before April 1, 2014, although acknowledgement or adoption can establish the relationship. (government.nl)

Assisted-reproduction legislation can likewise make parenthood depend on consent, treatment arrangements, and timing rather than genetic connection alone. The United Kingdom introduced provisions recognizing a birth mother’s female partner as a legal parent on April 6, 2009. Under the framework described by the Human Fertilisation and Embryology Authority, a spouse or civil partner is ordinarily the second legal parent following treatment with donated sperm or embryos unless she did not consent to treatment. An unmarried partner can acquire that status through the prescribed consent procedure at a licensed clinic, completed before insemination or embryo transfer. Providing the egg does not, by itself, establish the non-birth partner’s legal parenthood. (preprodportal.hfea.gov.uk)

Surrogacy involves a different allocation of parenthood. Under UK rules described in government guidance in October 2026, the surrogate is the legal parent at birth, including where she has no genetic connection to the child. Her spouse or civil partner is normally the second parent unless that person did not consent. Intended parents’ marriage does not transfer these relationships. A parental order or adoption is required; joint parental-order applicants may be married, civil partners, or living as partners, and at least one must have a genetic relationship with the child. The surrogate and any other legal parent must give the necessary consent. A surrogacy agreement is not enforceable under UK law and cannot substitute for the judicial process. (gov.uk)

Legal parenthood also differs from parental responsibility, the authority and duties associated with a child’s upbringing. In England and Wales, government guidance current in October 2026 states that marrying a child’s parent does not automatically give a stepparent parental responsibility. Birth registration and treatment-consent documentation can be relevant to acquiring responsibility, but their effect depends on the applicable parenthood rules. After separation or divorce, arrangements concerning residence and contact are distinct from parental status and financial support. Parents may agree where children live and how time is divided, or seek a court order; parental responsibility does not itself guarantee contact. A parent’s obligation to support the child financially exists whether or not that parent has parental responsibility. (gov.uk)

Cross-border recognition and regional human-rights law

Cross-border recognition separates the validity of a marriage where it was celebrated from its treatment elsewhere. Under private international law, formal validity may depend on the law of the place of celebration, while capacity to marry may depend on nationality, domicile, or habitual residence. The receiving jurisdiction may also invoke a public-policy exception against applying foreign law or recognizing a foreign status, subject to applicable supranational obligations. Recognition need not be all-or-nothing: a relationship may qualify for residence rights without receiving every domestic consequence of marriage. Dutch government guidance accordingly distinguishes the availability of same-sex marriage in the Netherlands from its recognition abroad. (europarl.europa.eu)

In Coman and Others (C-673/16), decided on June 5, 2018, the Court of Justice of the European Union addressed Romanian citizen Relu Adrian Coman and his American husband, Robert Clabourn Hamilton, who had married in Brussels in 2010. Romania’s refusal to treat Hamilton as a spouse raised the question of residence exceeding three months. The Court held that “spouse” in EU free-movement law includes a same-sex spouse. Where an EU citizen has genuinely resided in another member state and created or strengthened family life there, the citizen’s return to the state of nationality can generate a derived residence right for the non-EU spouse, subject to the relevant conditions. A state cannot defeat that right merely because its domestic law excludes same-sex marriage; the judgment did not require states to introduce domestic access to such marriages. (curia.europa.eu)

The Court extended this recognition jurisprudence in Wojewoda Mazowiecki (C-713/23), decided on November 25, 2025. Two Polish citizens who had married in Germany sought transcription of their marriage certificate into Poland’s civil register. The Court held that a member state must recognize, for the exercise of rights conferred by EU law, the marital status lawfully acquired by two EU citizens in another member state where they exercised freedom of movement and residence. States retain discretion over recognition procedures, but where transcription is the sole recognition mechanism, it must be available equally to same-sex marriages. This obligation, too, does not require opening domestic marriage. These judgments concern European Union law and qualifying cross-border circumstances, rather than establishing a worldwide recognition rule. (curia.europa.eu)

The European Convention on Human Rights distinguishes access to marriage from legal protection of relationships. Article 12 has not been interpreted as requiring contracting states to open marriage to same-sex couples. In Oliari and Others v. Italy, decided on July 21, 2015, however, the European Court of Human Rights found an Article 8 violation because three same-sex couples lacked an adequate framework for recognition and protection; civil unions or registered partnerships could provide such a framework. In Fedotova and Others v. Russia, the Grand Chamber confirmed on January 17, 2023, that contracting states have a positive obligation to provide legal recognition and protection, while retaining discretion over its form and content. These are Convention standards, distinct from EU citizenship rules. For marriages celebrated abroad, Orlandi and Others v. Italy (December 14, 2017) likewise distinguished an obligation to provide protection from an obligation to register the relationship specifically as a marriage. (ks.echr.coe.int)

Succession and dissolution involve additional recognition questions. Article 1(2)(a) of EU Succession Regulation 650/2012 excludes personal status and family relationships: identifying the law governing an estate therefore does not itself determine whether a claimant is legally a spouse. The Rome III Regulation, which governs applicable divorce law in participating EU states, similarly excludes the existence, validity, and recognition of marriage. Its Article 13 states that the regulation does not itself oblige a court to pronounce divorce where its law does not regard the marriage as valid for divorce proceedings. These instruments consequently do not independently resolve every preliminary question about marital status. (eur-lex.europa.eu)

Parenthood may also require recognition independently of marriage. In Stolichna obshtina, rayon “Pancharevo” (C-490/20), decided on December 14, 2021, a Spanish birth certificate identified two women as a child’s parents. The Court held that the member state of the child’s nationality must issue an identity card or passport without first requiring a domestic birth certificate, and that member states must recognize the parent–child relationship sufficiently to permit the child to exercise EU free-movement rights with either parent. The ruling did not require recognition of that parenthood for every domestic-law purpose: its operative reach concerned the child’s EU rights, not comprehensive harmonization of family law. (curia.europa.eu)

Religious institutions and solemnization

Civil marital status, religious marriage, and a blessing of a couple are distinct acts. A religious ceremony can also solemnize a legally recognized marriage when the applicable law authorizes the officiant and the statutory requirements are met; religious approval alone does not establish civil status. Conversely, a religious institution may offer prayer for a couple without recognizing their relationship as marriage under its own doctrine. These distinctions appear explicitly in England and Wales: the Marriage (Same Sex Couples) Act 2013 permits specified religious routes to marriage, while the Church of England’s prayers for same-sex couples do not constitute church weddings. (gov.uk)

The Church of England states that same-sex couples cannot legally marry in its churches. Its House of Bishops nevertheless commended Prayers of Love and Faith on December 12, 2023, for use in regular public worship from December 17, 2023. The resources include readings and prayers of thanksgiving, dedication, and requests for God’s blessing. Their use is discretionary, rather than an obligation on every priest, and they are not a marriage service. Thus, a couple’s civil marriage or partnership and subsequent prayer in church retain different legal and institutional meanings. The bishops’ January 2026 account continued to distinguish these prayers from any alteration of the church’s doctrine of marriage. (churchofengland.org)

Within the Catholic Church, the Dicastery for the Doctrine of the Faith issued Fiducia supplicans on December 18, 2023, with Pope Francis’s approval. It permitted pastoral blessings of same-sex couples without validating their status as marriage or changing Catholic marriage doctrine. The declaration distinguished spontaneous pastoral blessings from prescribed liturgical rites: such blessings must not accompany, or be connected with, ceremonies of civil union, and must avoid wedding-associated clothing, gestures, or words. A clarification dated January 4, 2024, described the permitted acts as brief, non-liturgical, non-ritualized blessings of couples, rather than blessings legitimizing their unions. This provision therefore concerns pastoral practice, not admission to the sacrament of matrimony. (vatican.va)

Selected institutions within Judaism and Unitarian Universalism have authorized affirmative union rituals while preserving ministerial discretion. In March 2000, the Central Conference of American Rabbis, the North American Reform rabbinical organization, adopted a resolution affirming appropriate Jewish rituals for same-gender Jewish couples. It supported both rabbis who chose to officiate and those who declined. The resolution did not itself settle whether those unions constituted kiddushin, the Jewish legal category of marriage subsequently considered in a CCAR responsum. Earlier, the Unitarian Universalist Association’s 1984 General Assembly affirmed ministers’ growing practice of conducting services of union for gay and lesbian couples and urged congregational support. That resolution explicitly acknowledged that North American civil authorities then denied those couples legal marriage. (ccarnet.org)

Institution-specific rules are also necessary when describing Muslim solemnization. The Virtual Nikkah, a religious ceremony provider, expressly excludes same-sex couples from its services; this is the provider’s stated policy, not a position attributable to every Muslim institution. In the United States, Muslims for Progressive Values separately explains the relationship between its nikah ceremonies and civil marriage: its celebrants can sign civil marriage licenses where local law permits, but it also offers religious ceremonies without signing a license. Its service documentation states that a nikah alone does not confer the protections of a legally recognized marriage. These examples identify both an institutional eligibility rule and the distinction between religious ceremony and civil authorization. (thevirtualnikkah.com)

Statutory protections can operate at both institutional and individual levels. In England and Wales, section 4 of the 2013 Act established an opt-in route for registered places of worship, requiring the relevant religious governing authority’s written consent before a building could be registered for same-sex marriages. Section 2 prohibits compelling a person to undertake an opt-in activity or to conduct, participate in, or consent to a same-sex religious marriage. Institutional consent therefore does not compel every individual minister to officiate. These provisions concern religious solemnization and associated consent; the Church of England remains subject to a separate statutory arrangement rather than this ordinary opt-in route. (legislation.gov.uk)

Public attitudes and documented political participation

Pew Research Center’s November 2023 comparison covered adult populations in 32 countries and territories, using probability-based samples weighted for selection probabilities and demographic benchmarks. Outside the United States, fieldwork comprised 24,546 adults in 21 publics interviewed February 20–May 22, 2023; 10,390 in Hong Kong, Japan, South Korea, Taiwan and Vietnam interviewed June 2–September 17, 2023; and 10,551 in Cambodia, Malaysia, Singapore, Sri Lanka and Thailand interviewed June 1–September 4, 2022. Methods varied by location: telephone interviews, face-to-face interviews and, in Australia, a mixed-mode probability-based online panel. The U.S. component surveyed 3,576 adults on March 20–26, 2023 through the American Trends Panel, recruited by random sampling of residential addresses. These were separate fieldwork periods, not a simultaneous worldwide poll. (pewresearch.org)

The international questionnaire asked: “Do you strongly favor, somewhat favor, somewhat oppose or strongly oppose allowing gays and lesbians to marry legally?” Combining the two favorable categories, reported support ranged from 92% in Sweden and 89% in the Netherlands to 9% in Kenya and 2% in Nigeria; it was 63% in the United States. The item measured support for legal access to marriage, not the broader question of whether homosexuality should be accepted by society. (pewresearch.org) Demographic differences also appeared: in Australia, support was 83% among women and 67% among men; in the United States, it was 73% among adults under 40 and 57% among those aged 40 and older. These cross-sectional differences do not themselves establish how individuals’ attitudes change with age. (pewresearch.org)

Petitions and parliamentary submissions document participation by organized groups and individuals rather than representative population opinion. In New Zealand, the Government Administration Committee considered Louisa Wall’s Marriage (Definition of Marriage) Amendment Bill alongside Petition 2011/35, submitted by Bob McCoskrie on behalf of Protect Marriage, which requested retention of a definition limited to one man and one woman. The committee received 21,533 submissions and heard 220, with hearings in Wellington, Auckland and Christchurch. Parliament’s procedural account records that 18,635 submissions used standard forms. Such totals measure mobilization through a consultation process; they cannot be interpreted as percentages of national support or opposition. (legislation.govt.nz)

Litigation provided another channel for advancing claims about marital status. The proceedings consolidated in Obergefell v. Hodges, decided on June 26, 2015, involved 14 same-sex couples and two men whose same-sex partners had died, challenging restrictions in Michigan, Kentucky, Ohio and Tennessee. James Obergefell’s claim concerned recognition as the surviving spouse of John Arthur on Arthur’s death certificate. These cases placed specific licensing and recognition disputes before the courts, rather than asking a sampled population to express a policy preference; the constitutional holding is distinct from the participation of litigants that produced the proceedings. (justice.gov)

Direct public participation also took different institutional forms. Ireland submitted its marriage-equality constitutional amendment to a referendum on May 22, 2015, and the proposal passed. (electoralcommission.ie) Australia instead conducted the voluntary Australian Marriage Law Postal Survey from September 12 to November 7, 2017, asking whether the law should change to allow same-sex couples to marry. It received responses from 79.5% of eligible Australians; among valid yes-or-no responses, 7,817,247, or 61.6%, favored change. Unlike Pew’s sample surveys, it sought participation across the eligible electorate. The National Museum of Australia preserves Equality Campaign material and documents campaigning on both sides. (abs.gov.au)

Survey support and legal status must be dated and examined separately: Pew reported 73% support in Italy in 2023, although domestic same-sex marriage was not legal there. An association between public support and recognition does not establish causation in either direction. Comparisons over time also require attention to measurement: Pew cautioned that earlier surveys differed in thematic context and that interview modes changed in some locations, limiting straightforward interpretation of apparent trends. (pewresearch.org)

Demographic evidence and research methods

Demographic evidence distinguishes events from populations. Annual marriage registrations count marriages occurring during a specified year and jurisdiction; the stock of married couples counts existing unions at a particular time. Married-couple households are a narrower measure: in the American Community Survey (ACS), they identify a householder and a spouse living in the same household. Individual-spouse statistics instead count persons. Consequently, registrations cannot be substituted for existing unions, and household estimates do not enumerate every married person, particularly spouses living apart. Marriage-registration statistics may also describe the place of celebration rather than the couple’s residence. These differences affect both international comparisons and the denominators used to calculate marriage rates. (ons.gov.uk)

The U.S. Census Bureau’s April 1, 2026 release, written by Nestor Hernandez and Barbara Pham, reported approximately 836,000 same-sex married-couple households in 2024, using ACS one-year estimates. Approximately 450,000 were female couples and 386,000 male couples; another 551,000 households contained unmarried same-sex partners. The mean age of householders in same-sex marriages was 49.0 years, compared with 53.2 in opposite-sex marriages. Both spouses were employed in 60.8% of same-sex married-couple households, compared with 49.8% of opposite-sex married-couple households. Median annual household income was $108,500 for female same-sex couples and $140,500 for male same-sex couples; these income figures cover married and unmarried couples together, not marriages alone. (census.gov)

Geographic and household-composition statistics likewise require explicit denominators. In 2024, the District of Columbia had the highest proportion of same-sex couple households among states and state equivalents, at 3.2% of all households, including married and unmarried couples. A separate Census Bureau release using 2023 ACS data found children present in 25% of married female same-sex couple households, compared with 16% of unmarried female couple households. Such household measures describe co-residence, not the complete number of children for whom either spouse has legal parental responsibility. They also cannot establish that marriage caused differences in employment, income, or household composition. (census.gov)

Measurement depends on questionnaire design and processing. Before the ACS redesign, couple classification combined reported sex with relationship to the householder. Some opposite-sex couples were misclassified when a respondent incorrectly marked sex; because opposite-sex couples greatly outnumbered same-sex couples, even infrequent errors materially affected the smaller category. In 2019, the ACS introduced explicit same-sex and opposite-sex spouse and unmarried-partner categories, electronic consistency checks, and revised processing rules. Changes across that boundary therefore combine demographic change with measurement change. Relationship-to-householder questions also miss couples within a household when neither partner is the householder. ACS estimates have sampling uncertainty: published margins of error generally define 90% confidence intervals, and small differences or geographic rankings may not be statistically significant. (census.gov)

Marriage formation and dissolution can be studied through linked population registers and longitudinal surveys rather than successive household totals alone. A Swedish register study covering 1995–2012 examined registered partnerships and, from 2009, marriages. Its formation models standardized comparisons for age, parenthood, and previous opposite-sex marriage; divorce comparisons additionally accounted for marriage duration. This illustrates why comparisons need defined populations at risk and comparable follow-up periods: couples observed after two years of marriage cannot simply be compared with couples observed after twenty. Legal partnership conversions must also be distinguished from newly formed unions when constructing marriage cohorts. (pubmed.ncbi.nlm.nih.gov)

Research on changes following legal recognition requires a separate causal-inference design. A 2024 RAND study used difference-in-differences to compare changes in U.S. states opening marriage during 2000–2014 with changes in states not opening it until 2015. This approach depends on assumptions about parallel underlying trends and policy timing, not merely a before-and-after difference. Relevant confounders include economic conditions and concurrent policy changes. Selection into marriage also complicates comparisons between married and unmarried couples: their characteristics may differ before marriage. Estimated policy effects must therefore remain distinct from descriptive associations between marital status and outcomes. (rand.org)

References

1. Sexual orientation, further personal characteristics, England and Walesons.gov.uk
2. Same-sex marriage | Government.nlgovernment.nl
3. Same-sex marriageen.wikipedia.org
4. Glossary of Terms: LGBTQ | GLAADglaad.org
5. Marriage, cohabitation agreements, civil partnership | Government.nlgovernment.nl
6. Marriage and civil partnership in England and Walesgov.uk
7. Marriages and civil partnerships in England and Wales: Your legal rights and responsibilitiesgov.uk
8. Frequently Asked Questions :: California Secretary of Statesos.ca.gov
9. Instructions for Completing the Declaration of Domestic Partnership (Form DP-1)dp.cdn.sos.ca.gov
10. Answers to Frequently Asked Questions for Registered Domestic Partners and Individuals in Civil Unions | Internal Revenue Serviceirs.gov
11. Marriage, civil partnership, cohabitation agreement | Government.nlgovernment.nl
12. Marriages and civil partnerships in England and Wales: Plan your ceremonygov.uk
13. Ritual Brotherhood in Byzantiumcambridge.org
14. Introductioncambridge.org
15. Baker v. Nelsonmnhs.org
16. LGBTQ Rights in Denmarkblogs.loc.gov
17. Lov om registreret partnerskabretsinformation.dk
18. Staatsblad 2001, 9zoek.officielebekendmakingen.nl
19. Staatsblad 2001, 145zoek.officielebekendmakingen.nl
20. Same-Sex Marriage Around the Worldpewresearch.org
21. Nepal: Marriage Registration for Same-Sex Couples after seminal court rulingilgaasia.org
22. P Mlambo-Ngcuka signs Civil Union Act, 2006gov.za
23. Same-sex marriage law to go into effect tomorrowenglish.ey.gov.tw
24. Same-sex couples in Thailand can register marriage from 23 January onwardthailand.prd.go.th
25. Marriage equality in Australiaag.gov.au
26. Marriage Amendment Act - Questions and Answersdia.govt.nz
27. Ben-Ari v. Director of Population Administrationlarc.cardozo.yu.edu
28. Civil Partnershipsesteri.it
29. Supriyo v. Union of India, judgment of October 17, 2023api.sci.gov.in
30. Thailand Ready for Equal Marriage Law to Take Effect on 23 January 2025thailand.go.th
31. J.Y. Interpretation No. 748 (May 24, 2017)cons.judicial.gov.tw
32. Act for Implementation of J.Y. Interpretation No. 748mojlaw.moj.gov.tw
33. United States Reports, Volume 576, Part 2: Obergefell v. Hodgessupremecourt.gov
34. Marriage conditionsfamilieretshuset.dk
35. Act for Implementation of J.Y. Interpretation No. 748mojlaw.moj.gov.tw
36. Marriages and civil partnerships in England and Wales: Give noticegov.uk
37. Marriages and civil partnerships in England and Wales: Documents you'll need to give noticegov.uk
38. Registreret partnerskabborger.dk
39. Annul a marriage: When you can annul a marriagegov.uk
40. How to Apply for a Divorcejustice.gc.ca
41. Civil Marriage Act, section 7laws-lois.justice.gc.ca
42. Separating or divorcing: what you need to dogov.uk
43. What kind of property arrangements are possible in marriage and civil partnerships?government.nl
44. Act for Implementation of J.Y. Interpretation No. 748ey.gov.tw
45. Internal Revenue Bulletin: 2014-17irs.gov
46. Fixing common plan mistakes - Failure to obtain spousal consentirs.gov
47. All Legal Same-Sex Marriages Will Be Recognized for Federal Tax Purposeshome.treasury.gov
48. Internal Revenue Bulletin: 2013-38irs.gov
49. Federal job-protected family and medical leave rights extended to eligible workers in same-sex marriagesdol.gov
50. Health care coverage options for same-sex coupleshealthcare.gov
51. Guidance on HIPAA, Same-sex Marriage, and Sharing Information with Patients’ Loved Oneshhs.gov
52. 法務部新聞稿：同性配偶收養子女修法moj.gov.tw
53. Act for Implementation of J.Y. Interpretation No. 748mojlaw.moj.gov.tw
54. Parental status of duomoedersgovernment.nl
55. Chair's letter: early introduction of legal parenthood provisionspreprodportal.hfea.gov.uk
56. Becoming the legal parents of your childhfea.gov.uk
57. Surrogacy: legal rights of parents and surrogates—Become the child’s legal parentgov.uk
58. Surrogacy: legal rights of parents and surrogates—Overviewgov.uk
59. Parental rights and responsibilities: Who has parental responsibilitygov.uk
60. Making child arrangements if you divorce or separategov.uk
61. Parental rights and responsibilities: What parental responsibility isgov.uk
62. Directorate-General Internal Policies: Same-sex marriageseuroparl.europa.eu
63. What do I need to take into account if I decide to marry or form a civil partnership?government.nl
64. The term ‘spouse’ within the meaning of the provisions of EU law on freedom of residence for EU citizens and their family members includes spouses of the same sexcuria.europa.eu
65. Citizenship of the Union: recognition of a same-sex marriage lawfully concluded in another Member Statecuria.europa.eu
66. Guide on Article 12 — Right to marryks.echr.coe.int
67. Oliari and Others v. Italyhudoc.echr.coe.int
68. Fedotova and Others v. Russia [GChudoc.echr.coe.int
69. Orlandi and Others v. Italyhudoc.echr.coe.int
70. Regulation (EU) No 650/2012eur-lex.europa.eu
71. 10 year anniversary of the Marriage (Same Sex Couples) Act 2013gov.uk
72. Living in Love & Faith: A response from the Bishopschurchofengland.org
73. Can I marry in church?churchofengland.org
74. Prayers of Love and Faithchurchofengland.org
75. House of Bishops shares letter to the Church as Living in Love and Faith approaches conclusionchurchofengland.org
76. Declaration Fiducia Supplicans On the Pastoral Meaning of Blessingsvatican.va
77. Press release concerning the reception of Fiducia supplicansvatican.va
78. Same Gender Officiationccarnet.org
79. Same-sex marriage as kiddushin Archivesccarnet.org
80. Non-Discrimination of LGBTuuhouston.org
81. Book Now — The Virtual Nikkahthevirtualnikkah.com
82. Marriage Celebrancy Services and Network of Officiantsmpvusa.org
83. How people around the world view same-sex marriagepewresearch.org
84. Topline questionnaire: November 27, 2023 releasepewresearch.org
85. The Global Divide on Homosexuality Persistspewresearch.org
86. Marriage (Definition of Marriage) Amendment Bill: As reported from the Government Administration Committeelegislation.govt.nz
87. Chapter 22 Select Committee Proceedingswww3.parliament.nz
88. Obergefell v. Hodgesjustice.gov
89. Marriage Referendum and Age of Presidential Candidates Referendumelectoralcommission.ie
90. Report on the conduct of the Australian Marriage Law Postal Survey 2017abs.gov.au
91. Australian Marriage Law Postal Survey, 2017: Resultsabs.gov.au
92. Marriages in England and Walesons.gov.uk
93. Same-Sex Couple Households: 2019census.gov
94. Spouses in Opposite-Sex and Same-Sex Married Couples and Their Households: 2022www2.census.gov
95. More Female Than Male Same-Sex Couple Households in the United States in 2024census.gov
96. Percentage of Married and Unmarried, Same-Sex and Opposite-Sex Couple Households With Children Down From 2019 to 2023cdn.www.census.gov
97. Implementation of the Revised Relationship to Householder Item in the American Community Surveycensus.gov
98. Two Decades of Same-Sex Marriage in Sweden: A Demographic Account of Developments in Marriage, Childbearing, and Divorcepubmed.ncbi.nlm.nih.gov
99. Twenty Years of Legal Marriage for Same-Sex Couples in the United States: Evidence Review and New Analysesrand.org