William H. Koll (August 12, 1923 – September 27, 2003) was an American wrestler and coach.

As a wrestler, Koll was undefeated (72–0) and won three straight NCAA Championships (1946–1948).

Koll's college career was interrupted by World War II, during which he served and participated in the Normandy landings and earned a Bronze Star.

As a professor of Health and Physical Education and coach, Koll led Penn State for 14 seasons (1965–1979), which included unbeaten dual meet campaigns in 1967, 1970, 1971, 1972 and 1974.

Koll is a member of the National Wrestling Hall of Fame[2] and the father of Rob Koll, a collegiate wrestling head coach and NCAA champion at the University of North Carolina at Chapel Hill.