Joe Tiller (born December 7, 1942) was the head football coach at Purdue University from 1997 to 2008. Before coming to Purdue, Tiller was the head coach for the University of Wyoming football program. He was born in Toledo, Ohio.
A Montana State University graduate, where he was a member of Delta Sigma Phi fraternity, Tiller is known mostly for being one of the innovators of the spread offense.
During his tenure with the Purdue football program, Tiller led the Boilermakers to ten bowl game berths in twelve years. Prior to Tiller's arrival in 1997, Purdue had played in only five bowl games, most recently the 1984 Peach Bowl. On September 20, 2008, in a game versus Central Michigan, Tiller gained the school record for most career wins at 85, topping the previous mark of 84 set by Jack Mollenkopf (1956-1969).