Billy Bauer (November 14, 1915 – June 16, 2005) was an American jazz guitarist. Bauer was born in New York City. He played banjo as a child before switching to guitar. He played with the Jerry Wald band and recorded with Carl Hoff and His Orchestra in 1941 before joining Woody Herman in 1944 as a member of the First Herd and in 1946 he played with Benny Goodman and Jack Teagarden.
Working in small groups led by bassist Chubby Jackson and trombonist Bill Harris, Bauer established himself as a soloist in the bebop movement.