Marriage Act may refer to a number of pieces of legislation:

Australia

Marriage Act 1961, Australia's law that governs legal marriage.

Marriage Amendment (Definition and Religious Freedoms) Act 2017

Canada

Civil Marriage Act passed in Canada explicitly permitting same-sex marriages.

Hong Kong

Marriage Ordinance 1875

Marriage Reform Ordinance 1970

India

Special Marriage Act, 1954

Hindu Marriage Act, 1955

New Zealand

Marriage Act 1854, an early law in the colony governing marriage

Marriage Act 1955, the current Act

Marriage (Definition of Marriage) Amendment Act 2013

South Africa

Prohibition of Mixed Marriages Act, 1949, outlawing marriages between Whites and non-Whites

Marriage Act, 1961, and its amending acts:

Marriage Amendment Act, 1964

Marriage Amendment Act, 1968

Marriage Amendment Act, 1970

Marriage Amendment Act, 1972

Marriage Amendment Act, 1973

Marriage Amendment Act, 1981

Immorality and Prohibition of Mixed Marriages Amendment Act, 1985, repealing the 1949 prohibition

Recognition of Customary Marriages Act, 1998, which recognised marriages under African customary law

Civil Union Act, 2006, which extended marriage to same-sex couples

United Kingdom

Royal Marriages Act 1772 (12 Geo. 3. c. 11) (E & W & S)

Deceased Wife's Sister's Marriage Act 1907 (7 Edw. 7. c. 47) (UK)

Extent unknown by author:

Marriage Act 1811 or the Marriage of Lunatics Act 1811 (51 Geo. 3. c. 37) (the second short title was conferred by the Short Titles Act 1896, s.1 & first Sch.)

Marriage Act 1823 (4 Geo. 4. c. 76) (short title: 1896 Act, s.1)

Marriage Act 1824 (5 Geo. 4. c. 32) (short title: 1896 Act, s.1)

Marriage Act 1835 (5 & 6 Will. 4. c. 54) (short title: 1896 Act, s.1)

Marriage Act 1836 (6 & 7 Will. 4. c. 85) (short title: 1896 Act, s.1)

Births and Deaths Registration Act 1837 (7 Will. 4 & 1 Vict. c. 22) (short title: 1896 Act, s.1)

Marriage Act 1840 (3 & 4 Vict. c. 72) (short title: 1896 Act, s.1)

Marriage (Society of Friends) Act 1860 (23 & 24 Vict. c. 18) (short title: 1896 Act, s.1)

Marriage Confirmation Act 1860 (23 & 24 Vict. c. 24) (short title: 1896 Act, s.1)

Infant Marriage Act 1860 (23 & 24 Vict. c. 83) (short title: 1896 Act, s.1)

Marriage (Society of Friends) Act 1872 (35 & 36 Vict. c. 10) (short title: 1896 Act, s.1)

Greek Marriages Act 1884 (47 & 48 Vict. c. 20)

Marriages Validity Act 1886 (49 & 50 Vict. c. 3)

Marriages Act 1886 (49 & 50 Vict. c. 14)

The Marriage Acts 1811 to 1886 means the Marriage Act 1811, the Marriage Act 1823, the Marriage Act 1824, the Marriage Confirmation Act 1830, the Marriage Act 1835, the Marriage Act 1836, the Births and Deaths Registration Act 1837, the Marriage Act 1840, the Marriage and Registration Act 1856, the Marriage (Society of Friends) Act 1860, the Marriage Confirmation Act 1860, the Marriage (Society of Friends) Act 1872, the Greek Marriages Act 1884, the Marriages Validity Act 1886 and the Marriages Act 1886.

The Marriage Acts 1811 to 1929 was the collective title of the Marriage Acts 1811 to 1898 and the Age of Marriage Act 1929 so far as it related to England.

England and Wales

French Queen's Jointure (on Marriage to Duke of Suffolk) Act 1515 (7 Hen. 8. c. 8)

Six Clerks in Chancery Act 1523 (14 & 15 Hen. 8. c. 8)

Succession to the Crown (Marriage) Act 1536 (28 Hen. 8. c. 7)

Marriage of Richard Devereux Act 1536 (28 Hen. 8. c. 37)

Marriage of Lord Bulbeck Act 1536 (28 Hen. 8. c. 48)

Marriage Act 1540 (32 Hen. 8. c. 38)

Clergy Marriage Act 1548 (2 & 3 Edw. 6. c. 21)

Marriages (Pre-contract) Act 1548 (2 & 3 Edw. 6. c. 23) (repealed by the Marriage Act 1949, s.79 & fifth Sch., Pt.I)

Clergy Marriage Act 1551 (5 & 6 Edw. 6. c. 12)

Queen Mary's Marriage Act 1554 (1 Mar. Sess. 3. c. 2)

Bigamy Act 1603 (1 Jas. 1. c. 11)