Quadroon is a term derived from the Spanish language word cuarterón, from cuarto, "quarter", from Latin qurtus. It refers to a person with 3 European grandparents and one African; being 1/4 "black" ancestry. This term is considered obsolete and is no longer in general use.

This was part of a race classification used in the Spanish and French colonies in the New World, and to some extent also used in the Southern United States in the 19th century.

Quadroons were considered "colored" and often subject to slavery in the colonial era.

See also: mulatto, octoroon, multiracial