John Paul Cain (January 14, 1936 – March 20, 2017) was an American professional golfer who played on the Senior PGA Tour. Cain was born and raised in Sweetwater, Texas. He attended Texas Tech University and was a member of the golf team from 1955–1956 and 1958–1959. He helped the Red Raiders win the last two Border Conference championships in 1955 and 1956. In 1959, Cain helped the team win the Southwest Conference championship and place fifth in the NCAA Championship. Cain is a member of the Texas Golf Hall of Fame.