Bill Bain (born August 9, 1952 in Los Angeles) is a former National Football League center for the Los Angeles Rams. He played between 1975 and 1986. He also played for the Green Bay Packers, New England Patriots, Denver Broncos and New York Jets.

Bain played college football at the University of Southern California and was a All-America offensive lineman in 1974. Bain also played at University of Colorado and San Diego City College.