Elmer Ray Riddle (July 31, 1914 – May 14, 1984) was a professional baseball player. He was a pitcher over parts of ten seasons (1939–1949) with the Cincinnati Reds and Pittsburgh Pirates. He was the National League ERA champion in 1941 with Cincinnati. For his career, he compiled a 65–52 record in 190 appearances, with a 3.40 ERA and 342 strikeouts.
He was born in Columbus, Georgia, and later died there at the age of 69. His older brother Johnny Riddle was a Major League catcher and coach.