John William "Johnny" Bach (July 10, 1924 – January 18, 2016) was an American former professional basketball player and coach. Bach played college basketball at Fordham University and Brown University. He was born in Brooklyn, New York City.
He was selected by the Boston Celtics in the 1948 Basketball Association of America (BAA) Draft, and played 24 games for the Celtics. He coached the Golden State Warriors from 1983 through 1986. He became the assistant coach for the Chicago Bulls from 1986 through 2003. He retired in 2006.