Same-sex marriage in Saint Helena, Ascension and Tristan da Cunha

Notes

KoN: Performed in the Netherlands proper, including the Caribbean Netherlands. Registered in Aruba, Curaçao and Sint Maarten in such cases, but the rights of marriage are not guaranteed.
NZ: Neither performed nor recognized in Niue, Tokelau, or the Cook Islands.
UK: Neither performed nor recognized in six British Overseas Territories.
US: Neither performed nor recognized in some tribal nations. Recognized but not performed in several other tribal nations and American Samoa.
Israel: Registered foreign marriages confer all marriage rights. Domestic common-law marriages confer most rights of marriage. Domestic civil marriage recognized by some cities.
EU: The Coman v. Romania ruling of the European Court of Justice obliges the state to provide residency rights for the foreign spouses of EU citizens. All EU member states except Romania follow the ruling.
Cambodia: Recognition of a "declaration of family relationship", which may be useful in matters such as housing, but they are not legally binding.
China: Guardianship agreements, conferring some limited legal benefits, including decisions about medical and personal care.
HK: Inheritance, guardianship rights, and residency rights for foreign spouses of legal residents.
India: Courts have recognised guru–shishya, nata pratha or maitri karar–type contractual relationships, but they are not legally binding.
Japan: Some cities and prefectures issue partnership certificates, but they are not legally binding.
Namibia: Marriages conducted abroad between a Namibian national and a foreign spouse recognized for residency rights.
Romania: Hospital visitation rights through a "legal representative" status.

* Not yet in effect

Same-sex marriage has been legal in Saint Helena, Ascension and Tristan da Cunha since 2017. An ordinance to open marriage to same-sex couples in Saint Helena was passed by the Legislative Council in a 9–2 vote on 19 December 2017. It went into force the following day, and the first same-sex marriage was performed on 31 December 2018. Same-sex couples have also been able to marry on Ascension Island since 1 January 2017 and in Tristan da Cunha since 4 August 2017.

Saint Helena, Ascension and Tristan da Cunha was the fourth civilian British Overseas Territory to legalise same-sex marriage, following the Pitcairn Islands, Gibraltar and the Falkland Islands.