1956 U.S. National Championships – Men's singles
| Men's singles | |
|---|---|
| 1956 U.S. National Championships | |
| Champion | Ken Rosewall |
| Runner-up | Lew Hoad |
| Score | 4–6, 6–2, 6–3, 6–3 |
| Draw | 128 |
| Seeds | 8 |
Ken Rosewall defeated Lew Hoad 4–6, 6–2, 6–3, 6–3 in the final to win the men's singles tennis title at the 1956 U.S. National Championships. Hoad was attempting to complete the Grand Slam.