1915 U.S. National Championships – Men's singles

Men's singles
1915 U.S. National Championships
Champion William Johnston
Runner-up Maurice McLoughlin
Score1–6, 6–0, 7–5, 10–8

William Johnston defeated Maurice McLoughlin 1–6, 6–0, 7–5, 10–8 in the final to win the men's singles tennis title at the 1915 U.S. National Championships. The event was held at the West Side Tennis Club in Forest Hills, New York in the United States.