Anti-miscegenation laws or miscegenation laws are laws that enforce racial segregation at the level of marriage and intimate relationships by criminalising interracial marriage and sometimes also sex between members of different races.

Such laws were first introduced in North America from the late seventeenth century onwards by several of the Thirteen Colonies, and subsequently by many US states and US territories and remained in force in many US states until 1967.

The laws prohibited the solemnization of weddings between persons of different races and prohibited the officiating of such ceremonies.

Sometimes, the individuals attempting to marry would not be held guilty of miscegenation itself, but felony charges of adultery or fornication would be brought against them instead.