1908 U.S. National Championships – Men's singles

Men's singles
1908 U.S. National Championships
Champion William Larned
Runner-up Beals Wright
Score6–1, 6–2, 8–6

Defending champion William Larned won the Challenge Round against Beals Wright 6–1, 6–2, 8–6 to capture the men's singles tennis title at the 1908 U.S. National Championships. Wright had defeated Fred Alexander in the All Comers' Final.

The event was held at the Newport Casino in Newport, R.I. in the United States. There were more than 128 players in the draw.