Hobart Sherwood Billingsley (December 2, 1926 – July 16, 2022) was an American diver for Ohio State University and a Hall of Fame coach for Indiana University from 1959-1989, where he led the Hoosiers to six NCAA national swimming and diving team championships.

[4] Billingsley attended Ohio State University (OSU), where he won the NCAA one-and three-meter titles during his freshman year in 1945.

[2] He subsequently undertook postgraduate studies at the University of Washington and obtained a master's degree.

[6] During his time at Indiana, he coached the United States Olympic diving team at the 1968, 1972, and 1976 Summer Games.

His Olympic gold and bronze medalists include Lesley Bush, Kenneth Sitzberger, Mark Lenzi (twice), Cynthia Potter, Edwin Young, and Jim Henry.

He was profiled in the award-winning and widely televised documentary Hobie’s Heroes — 25th Anniversary Edition, which depicts the struggles and successes of young divers training under this legendary coach.