Erwin Bratton "Harry" Ault (1883–1961) was an American socialist and trade union activist. He is best remembered as the editor of the Seattle Union Record, the long-running labor weekly (turned daily) published from 1912 to 1928. After termination of the Union Record, Ault worked as a commercial printer for a number of years, before being appointed a deputy U.S. Marshal for Tacoma, Washington, a position which he retained for 15 years.