1926 U.S. National Championships – Men's singles
# 1926 U.S. National Championships – Men's singles

René Lacoste defeated Jean Borotra in the final, 6–4, 6–0, 6–4 to win the men's singles tennis title at the 1926 U.S. National Championships. It was Lacoste's first U.S. Championships title and his third major title overall.

Bill Tilden was the six-time defending champion, but was defeated in the quarterfinals by reigning French Championships champion Henri Cochet.

## Draw

### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Final eight

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Bill Tilden | 8 | 1 | 3 | 6 | 6 | | | | | | | | | | |
| Henri Cochet | 6 | 6 | 6 | 1 | 8 | | | | | | | | | | |
| Henri Cochet | 6 | 6 | 6 | 1 | 8 | Henri Cochet | 6 | 6 | 4 | 4 | 3 | | | | |
| | | | | | | René Lacoste | 2 | 4 | 6 | 6 | 6 | | | | |
| R. Norris Williams | 0 | 3 | 6 | | | René Lacoste | 2 | 4 | 6 | 6 | 6 | | | | |
| René Lacoste | 6 | 6 | 8 | | | | | | | | | | | | |
| René Lacoste | 6 | 6 | 8 | | | | | | | | | René Lacoste | 6 | 6 | 6 |
| | | | | | | | | | | | | Jean Borotra | 4 | 0 | 4 |
| Vincent Richards | 6 | 6 | 6 | | | | | | | | | | | | | Jean Borotra | 4 | 0 | 4 |
| Jacques Brugnon | 2 | 1 | 2 | | | | | | | | | | | | |
| Jacques Brugnon | 2 | 1 | 2 | | | Vincent Richards | 6 | 4 | 6 | 6 | 2 | | | | |
| | | | | | | Jean Borotra | 3 | 6 | 4 | 8 | 6 | | | | |
| Bill Johnston | 6 | 6 | 3 | 4 | 4 | Jean Borotra | 3 | 6 | 4 | 8 | 6 | | | | |
| Jean Borotra | 3 | 4 | 6 | 6 | 6 | | | | | | | | | | |
