c. 23) is an Act of the Parliament of the United Kingdom of Great Britain and Ireland, enacted to provide legal authority for marriages of British subjects performed outside the United Kingdom.

The act also provided that marriages performed abroad under local laws could be registered with the British government, provided a British consular official personally witnessed the marriage.

When originally enacted in 1892, the act applied to all of Great Britain and Ireland.

Until their repeal, sections of the act also defined the procedures used for consular marriages, which until recently – with the abolition of extraterritoriality for British subjects abroad or within the British Empire, the obsolescence of the class of the British Protected Person and the development of the concept of Lex loci celebrationis and the qualifications for its invocation (especially by the case of Radwan v Radwan (1972) (3 All ER 967), which effectively rendered foreign and Commonwealth consular marriages and British consular marriages alike invalid in England) in English law – allowed British subjects to get married abroad but under the matrimonial laws of England rather than foreign laws, through the British consul-general, consul, consulate or consular section.

The act was repealed in Northern Ireland by the Marriage (Same-sex Couples) and Civil Partnership (Opposite-sex Couples) (Northern Ireland) Regulations 2019, which came into force on 13 January 2020.