William Glenn Percy (December 10, 1928 – June 23, 2014) was an American football coach. He was the 24th head football coach at the Ottawa University in Ottawa, Kansas, serving for five seasons, from 1984 to 1988, and compiling a record of 21–29. After working in Ottawa for five seasons, Percy was hired by Hutchinson Community College of the Kansas Jayhawk Community College Conference (KJCCC).