Mousie or Mousey may refer to:
Nickname Mousey Alexander (1922–1988), American jazz drummer Mary Baird (nurse) (1907–2009), Northern Irish nurse and health service administrator nicknamed "Mousie" Paul Garner (1909–2004), American actor nicknamed "Mousie" Diana Lewis (1919–1997), American actress nicknamed "Mousie", wife of actor William Powell Joseph "Mousie" Massimino (born c. 1951), an underboss of the Philadelphia crime family Bruce Strauss (born 1952), American retired boxer called "Mousie" during his school years Marcia "Mousie" Williams, a 2007 inductee into the United States Show Jumping Hall of Fame
Other uses Mousie, Kentucky, United States, an unincorporated community Mousey, a 1974 Canadian film Mousie, a character in the 1993 American film Mi Vida Loca Mousie, winner of the 1868 Prix Vanteaux French horse race