"Say It Ain't So" is a 1994 song by Weezer.
Say It Ain't So may also refer to:
Say It Ain't So (album), a 1975 album by Murray Head "Say It Ain't So", a 2003 song by the Thrills from So Much for the City "Say It Ain't So" (Degrassi), a 2012 television episode "Say It Ain't So" (Roseanne), a 1997 television episode
See also Say It Ain't So, Joe (disambiguation) Say It Isn't So (disambiguation)