Samuel, Sammy or Sam Day may refer to:
Samuel Day (sportsman) (1878–1950), English cricketer and footballer, known as Sammy Day
Samuel S. Day (1808–1871), Canadian-born American Baptist missionary
Samuel T. Day (1838–1877), American physician, plantation owner and politician
Sam Day (jockey) (1802–1866), English jockey and uncle of
Sam Day Jr. (1818–1838), English jockey
Sam Day (Australian rules footballer) (born 1992), Australian rules footballer
Sammy Day, the title character of the Belgium comic series Sammy
Sam Day (rugby league) (born 1994), rugby league player
