William Elko (born December 28, 1959) is a former American football lineman who played three seasons in the National Football League (NFL) with the San Diego Chargers and Indianapolis Colts. He was drafted by the Chargers in the seventh round of the 1983 NFL Draft. Elko first attended Arizona State University before transferring to play college football at Louisiana State University. He attended Windber High School in Windber, Pennsylvania.