"51st state" is a phrase that refers to areas considered candidates for addition to the 50 states already part of the United States.
51st State may also refer to:
"51st State" (song), a 1986 song by New Model Army The 51st State, a 2001 British film 51st State, a 1998 novel by Peter Preston 51st State (board game), a 2010 board game The 51st State (television program), 1972–1976 television program