Marriage is an institution that is historically filled with restrictions. From age to gender, to social status, various restrictions are placed on marriage by communities, religious institutions, legal traditions, and states.
Marriage age The minimum age at which a person is able to lawfully marry, and whether parental or other consents are required, vary from country to country. In the U.S. the minimum age for marriage without parental and/or judicial approval is 18 except for Nebraska (19) and Mississippi (21); but most states allow exceptions to the general minimum age in some circumstances (see
Marriage age in the United States). In
England and Wales the general age at which a person may marry is 18, but 16- or 17-year-olds may get married with their parents' or guardians' consent. If they are unable to obtain this, they can gain consent from the courts, which may be granted by the Magistrates' Courts, or the county or High Court family divisions. In
Nigeria, because most marriages are religious ones, there is no strict minimum age for marriage. The issues of age is in most cases determined by respective religious bodies coordinating the marriage as well as the parent's consent. In
Sierra Leone, the president has banned marriages for children ages 18 and under and imposed steep fines on adult spouses. In the Philippines, the minimum legal age for marriage is 18, but individuals who are 16 or 17 can marry with parental consent. However, the country has specific provisions for Muslim marriages, which may differ from civil marriage regulations.
Gender restrictions Legal,
social, and
religious restrictions apply in all countries on the genders of the couple. In response to changing social and political attitudes, some jurisdictions and
religious denomination now recognize marriages between people of the same sex. Other jurisdictions have instead "
civil unions" or "
domestic partnerships", while additional others explicitly prohibit
same-sex marriages. In 1989,
Denmark became the first country to legally recognize a relationship for same-sex couples, establishing
registered partnerships, which gave those in same-sex relationships "most rights of married heterosexuals, but not the right to adopt or obtain joint custody of a child". In 2001, the
Netherlands became the first country in the world to legalize same-sex marriage. As of January 2025, marriage between same-sex couples is legally performed and recognized in 39 countries- the
Netherlands,
Belgium,
Spain,
Canada,
South Africa,
Norway,
Sweden,
Portugal,
Iceland,
Argentina,
Denmark,
Brazil,
France,
Uruguay,
New Zealand,
Luxembourg, the
United States,
Ireland,
Colombia,
Finland,
Malta,
Germany,
Australia,
Austria,
Taiwan,
Ecuador, the
United Kingdom,
Costa Rica,
Chile,
Switzerland,
Slovenia,
Cuba,
Mexico,
Andorra,
Estonia,
Greece,
Liechtenstein, and
Thailand. As of January 2025,
Nepal has recognized same-sex marriage (it is not yet fully recognized with the same rights as opposite-sex marriages, and on June 28, 2023,
Supreme Court Justice Til Prasad Shrestha directed the government to establish a "separate register" for "
sexual minorities and non-traditional couples" and to "temporarily register their marriages”). Marriage equality in Liechtenstein came into effect on January 1, 2025. The equal marriage bill in Thailand was passed with an overwhelming majority (130–4) on March 27, 2024. In 2019,
Taiwan became the first country in Asia to legalize same-sex marriage.
Thailand is expected to become the first country in
Southeast Asia to recognize same-sex marriage after a marriage equality bill passed both the
House of Representatives and the
Senate.
Civil union,
civil partnership,
domestic partnership, and
registered partnership statuses offer varying legal benefits of marriage. As of , countries that have an alternative form of legal recognition other than marriage on a national level are:
Bolivia,
Croatia,
Cyprus, the
Czech Republic,
Hungary,
Italy,
Latvia,
Monaco,
Montenegro, and
San Marino.
Further religious conflicts These developments have created a political and religious reaction in some countries, including in
England, where the
Church of England, after long debate, officially banned blessings of gay couples by Church of England clergy, and in the
United States, which continues to experience conflicts, based upon religious grounds.
Kinship restrictions Kinship is two people that are related by blood or adoption, such as brother, sister, mother, father, aunt, uncle etc. The U.S. is the only western country with cousin marriage restrictions, no European country prohibits marriage between first cousins. Societies have often placed restrictions on marriage to relatives, though the degree of prohibited relationship varies widely. In most societies, marriage between brothers and sisters has been forbidden, with ancient Egyptian, Hawaiian, and Inca royalty being prominent exceptions. In many societies, marriage between
first cousins is preferred, while at the other extreme, the
medieval Catholic Church prohibited marriage even between distant cousins. In the
United Kingdom, the
Deceased Wife's Sister's Marriage Act 1907 removed the previous prohibition for a man to marry the sister of his deceased wife. In Australia, marriage with an ancestor or descendant is prohibited, as is a marriage between a brother and a sister, whether of whole blood or half-blood and even if the brother or sister has been adopted. All mainstream religions prohibit some marriages on the basis of the
consanguinity (lineal descent) and
affinity (kinship by marriage) of the prospective marriage partners, though the standards vary.
Social restrictions In the Indian
Hindu community, especially in the
Brahmin caste, marrying a person of the same
gotra was prohibited, since persons belonging to the same
gotra are said to have identical
patrilineal descent. In ancient
India, when
gurukuls existed, the
shishyas (pupils) were advised against marrying any of
guru's children, as
shishyas were also considered the guru's children and it would be considered marriage among
siblings. However, there were exceptions, including
Arjuna's son
Abhimanyu's marriage to Uttara, the dance student of Arjuna in
Mahabharata.
The Hindu Marriage Act, 1955 brought reforms in the area of same-gotra marriages, which were banned prior to the act's passage. Now the Indian constitution allows any consenting adult heterosexual couple (women 18 or older and men 21 or older) from any race, religion, caste, or creed to marry. Many societies have also adopted other restrictions on whom one can marry, such as prohibitions of marrying persons with the same surname, or persons with the same sacred animal.
Anthropologists refer to these sorts of restrictions as
exogamy. In
South Korea, marriage between people having the same surname and belonging to the same clan was prohibited by the
Article 809 of the Korean Civil Code, until the act was determined "non-conforming to the Constitution" in 1997. Societies have also at times required marriage from within a certain group. Anthropologists refer to these restrictions as
endogamy. An example of such restrictions would be a requirement to marry someone from the same tribe.
Racist laws adopted by some societies in the past—such as
Nazi-era Germany,
apartheid-era South Africa, and most of the
United States in the nineteenth and the first half of the 20th century—and which prohibited
marriage between persons of different races could also be considered examples of
endogamy. In modern Israel, the status of marriage is the same as it was historically under the
Ottoman Empire and the
British mandate, where civil marriage does not exist and authority for marriage is given by the state solely to the recognized religious denominations (
Orthodox Judaism,
Islam,
Druze, and ten Christian denominations (primarily
Orthodox Christianity and
Catholicism), but also including the
Episcopal Church). Israeli couples who wish to contract a marriage that are not allowed under the auspices of any of these religious denominations (including same-sex marriages, marriages involving Israelis of Jewish descent who are not recognized by the state as
Jewish and marriages between non-Jewish
Arab citizens of Israel and Israeli Jews) or simply wish to get legally married outside the auspices of one of these institutions cannot do so in Israel itself. However, Israel does recognize civil marriages between Israeli citizens that are contracted abroad, including
same-sex marriage, so couples in these situations will often hold a non-binding ceremony in Israel and fly abroad (often to nearby Cyprus) to contract a legal marriage that is then recognized in Israel. In 2023, the Israel Supreme Court ruled couples married by officials virtually, must be recognized by the government. This further reduced barriers to marriage for Israelis seeking civil marriage. In the
U.S., many
laws banning interracial marriage, which were
state laws, were gradually repealed between 1948 and 1967. The
U.S. Supreme Court declared all such laws unconstitutional in the case of
Loving v. Virginia in 1967.
Polygamy Polygamy—being married to more than one spouse—is illegal in most countries. Where polygamous marriages are allowed, it is typically
polygyny that is permitted. While accepted by some societies, it is far less common than
monogamy. Polygamy is normally not permitted in most Western countries, although some recognize
bona fide polygamous marriages that were performed in other countries. Polygamy is practiced illegally by some groups in the United States and Canada, primarily by
certain Mormon fundamentalist sects that separated from the mainstream
Latter Day Saints movement after the practice was renounced in 1890. Many societies, even some with a cultural tradition of polygamy, recognize
monogamy as the only valid form of marriage. For example,
People's Republic of China shifted from allowing polygamy to supporting only
monogamy in the
New Marriage Law of 1950 after the
Communist Revolution. In Islam, polygamy is permitted by the
Quran (4:3), which states, in a verse setting rules for the adoption of orphans,
"If you fear you might fail to give orphan women their ˹due˺ rights ˹if you were to marry them˺, then marry other women of your choice—two, three, or four. But if you are afraid you will fail to maintain justice (between your wives) then ˹content yourselves with˺ one or those ˹bondwomen˺(slaves) in your possession. This way you are less likely to commit injustice (to the orphan girls in your care)". Africa has the highest rate of polygamy in the world. In India,
only Muslims are allowed to practice polygamy. Polygamy, taking the form of polygyny, is most common in a region known as the "polygamy belt" in
West Africa and
Central Africa, with the countries estimated to have the highest polygamy prevalence in the world being
Burkina Faso,
Mali,
Gambia,
Niger and
Nigeria. In the region of
sub-Saharan Africa, polygyny is common and deeply rooted in the culture, with 11% of the population of sub-Saharan Africa living in such marriages (25% of the Muslim population and 3% of the Christian population, as of 2019). In the 1980s and 1990s, many US state legislatures considered laws requiring premarital
HIV testing, though only a small number were adopted, and were only briefly active before being repealed. As of 2010, premarital HIV testing is legally mandated in
Bahrain, certain provinces of China,
Libya,
Saudi Arabia, the
United Arab Emirates, and
Uzbekistan. == State recognition ==