Billy Duane Tubbs (March 5, 1935 – November 1, 2020) was an American men's college basketball coach. He was born in St. Louis, Missouri. His career lasted from 1960 to 2003. He was a coach for Lamar University (1976–1980, 2003–2006), the University of Oklahoma (1980–1994) and Texas Christian University (1994–2002).