Robert Riley was an American football player and coach. He served as the head football coach at Montana Technological University from 1970 to 1971 and at Peru State College in Peru, Nebraska in 1974. After one year at Peru State, he left college coaching and served as the head coach at Kelly Walsh High School in Casper, Wyoming from 1975 to 1978. Riley was born in Hudson, New Hampshire and grew up in Gloucester, Massachusetts. He played college football as an end at Northern State College—now known as Northern State University—in Aberdeen, South Dakota.