Alexander Spinning Lilley (December 7, 1867 – December 8, 1925) was an American football coach. He served as the first head football coach at Ohio State University. Lilley was an unpaid volunteer coach during his time coaching at Ohio State. He was also known to ride an Indian pony to practices during his tenure. A plaque at the Ohio State football stadium memorializes him as "A Lone and Ardent Volunteer". Lilley died after a five-month illness in 1925. At the time of his death he was a manager for a shipbuilding company in New York.