Son-in-law is a kinship relationship as a result of marriage.
Son-in-law may also refer to: Son in Law (film), a 1993 American comedy film Son-in-Law (horse) (1911–1941), British Thoroughbred racehorse "Son-in-Law" (8 Simple Rules episode), an episode from Season 1 of the American sitcom 8 Simple Rules
See also In-law (disambiguation) Kinship terminology