Earl William Eby (November 18, 1894 – December 14, 1970) was an American sprinter who won a silver medal in the 800 m at the 1920 Summer Olympics. Earlier at the 1919 Inter-Allied Games he won the 400 m event and placed second in the 800 m to New Zealand's Daniel Mason. He won the 800 m event at the 1920 USA Outdoor Track and Field Championships. He was born in Aurora, Illinois, but attended high school in Chicago, first Calumet High and then Loyola Academy. He died in Valley Forge, Pennsylvania. Running for the Penn Quakers track and field team, Eby won an NCAA championship in the 800 m.