Roy Ellam (February 8, 1886 – October 28, 1948), nicknamed "Slippery", was a professional baseball player.

He was a shortstop for parts of two seasons (1909, 1918) with the Cincinnati Reds and Pittsburgh Pirates.

For his career, he compiled a .143 batting average, with one home run and six runs batted in.

He was killed on October 28, 1948 in Conshohocken when he was hit by a 150 lb (68 kg) weight which fell from a fire escape.

This biographical article relating to an American baseball shortstop is a stub.