Interracial marriage in the United States has been legal in all U. states since the 1967 Supreme Court decision Loving v.
Virginia that deemed "anti-miscegenation" laws unconstitutional. The proportion of interracial marriages as a proportion of all marriages has been increasing since, such that 15.1% of all new marriages in the United States were interracial marriages by 2010 compared to a low single-digit percentage in the mid 20th century.
This ranking scheme illustrates the manner in which the barriers against desegregation fell: Of less importance was the segregation in basic public facilities, which was abolished with the Civil Rights Act of 1964.
The most tenacious form of legal segregation, the banning of interracial marriage, was not fully lifted until the last anti-miscegenation laws were struck down in 1967 by the Supreme Court ruling in the landmark Loving v. Social enterprise research conducted on behalf of the Columbia Business School (2005–2007) showed that regional differences within the United States in how interracial relationships are perceived have persisted: Daters of both sexes from south of the Mason–Dixon line were found to have much stronger same-race preferences than northern daters did.
These statistics do not take into account the mixing of ancestries within the same "race"; e.g.