1919 U.S. National Championships – Men's singles
# 1919 U.S. National Championships – Men's singles

Bill Johnston defeated Bill Tilden in the final, 6–4, 6–4, 6–3 to win the men's singles tennis title at the 1919 U.S. National Championships. It was Johnston's second U.S. Championships singles title, after 1915.

The competition had an unseeded draw of 128 players.

## 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Robert Lindley Murray | 7 | 1 | 2 | 4 | | | | | | | | | |
| Bill Johnston | 4 | 6 | 6 | 6 | | | | | | | | | |
| Bill Johnston | 4 | 6 | 6 | 6 | Bill Johnston | 2 | 6 | 6 | 6 | | | | |
| | | | | | Wallace F. Johnson | 6 | 1 | 3 | 3 | | | | |
| Wallace F. Johnson | 6 | 6 | 6 | | Wallace F. Johnson | 6 | 1 | 3 | 3 | | | | |
| Walter Merrill Hall | 4 | 0 | 2 | | | | | | | | | | |
| Walter Merrill Hall | 4 | 0 | 2 | | | | | | | Bill Johnston | 6 | 6 | 6 |
| | | | | | | | | | | Bill Tilden | 4 | 4 | 3 |
| Bill Tilden | 1 | 6 | 7 | 6 | | | | | | | | | | Bill Tilden | 4 | 4 | 3 |
| Norman Brookes | 6 | 4 | 5 | 3 | | | | | | | | | |
| Norman Brookes | 6 | 4 | 5 | 3 | Bill Tilden | 6 | 7 | 6 | | | | | |
| | | | | | R. Norris Williams | 1 | 5 | 3 | | | | | |
| R. Norris Williams | 6 | 6 | 6 | | R. Norris Williams | 1 | 5 | 3 | | | | | |
| Maurice McLoughlin | 0 | 3 | 2 | | | | | | | | | | |
