1920 U.S. National Championships – Men's singles

Men's singles
1920 U.S. National Championships
Champion Bill Tilden
Runner-up Bill Johnston
Score6–1, 1–6, 7–5, 5–7, 6–3
Draw128
SeedsN.A.

Bill Tilden defeated Bill Johnston in the final, 6–1, 1–6, 7–5, 5–7, 6–3 to win the men's singles tennis title at the 1920 U.S. National Championships. It was Tilden's first U.S. Championships singles title, the first of an eventual record seven such titles, and his second major singles title overall.