1918 U.S. National Championships – Men's singles

Men's singles
1918 U.S. National Championships
Champion Robert Lindley Murray
Runner-up Bill Tilden
Score6–3, 6–1, 7–5
Draw87
Seeds

Defending champion Robert Lindley Murray defeated Bill Tilden in the final, 6–3, 6–1, 7–5 to win the men's singles tennis title at the 1918 U.S. National Championships.

The event was held at the West Side Tennis Club in Forest Hills, Queens, from August 26 through September 3, 1918.