William Glenn Killinger (September 13, 1898 – July 25, 1988) was an American football, basketball, and baseball player, coach, and college athletics administrator from Harrisburg, Pennsylvania.

He graduated Harrisburg Technical High School and then lettered in three sports at Pennsylvania State University, where he was an All-American in football in 1921.

During that time, he played for the Jersey City Skeeters (1922), Atlanta Crackers (1923), Harrisburg Senators (1924, 1927–1928), Shamokin Indians (1926) and the Williamsport Grays (1929–1932).

Glenn Killinger, All-American: Penn State's World War I Era Sports Hero.

(Jefferson, NC: McFarland & Co.) ISBN 978-1476670515 Retrieved April 22, 2018 # denotes interim head coach