1898 U.S. National Championships – Men's singles
| Men's singles | |
|---|---|
| 1898 U.S. National Championships | |
| Champion | Malcolm D. Whitman | 
| Runner-up | Robert Wrenn | 
| Score | w/o | 
Malcolm Whitman defeated Dwight F. Davis in the All Comers final, 3–6, 6–2, 6–2, 6–1 to win the men's singles tennis title at the 1898 U.S. National Championships. Two-time reigning champion Robert Wrenn did not defend his title.