Harold Ellis "Moose" Watson (July 14, 1898 – September 11, 1957) was a Canadian amateur hockey player who was a member of the Toronto Granites team that won the Allan Cup and a gold medal for Canada at the 1924 Winter Olympics. He served in the Royal Flying Corps as a fighter ace. He flew a Royal Aircraft Factory SE.5a to victory over an Albatros D.V on 25 January 1918, sharing the win with fellow Canadian Frank H. Taylor. By the time he scored his sixth and final win on 4 July, he had destroyed another enemy plane and sent four more down out of control.