1966 U.S. National Championships – Men's singles
| Men's singles | |
|---|---|
| 1966 U.S. National Championships | |
| Champion | Fred Stolle |
| Runner-up | John Newcombe |
| Score | 4–6, 12–10, 6–3, 6–4 |
| Draw | 128 |
| Seeds | 8 |
Unseeded Fred Stolle defeated John Newcombe 4–6, 12–10, 6–3, 6–4 in the final to win the men's singles tennis title at the 1966 U.S. National Championships.