| Champ: |  Björn Borg |
| Runner: |  Guillermo Vilas |
| Score: | 6–3, 6–4, 6–2 |
| Type: | singles doubles |
| Draw: | 64 |
| Seeds: | 2 |
The 1975 U.S. Pro Tennis Championships – Singles was an event of the 1975 U.S. Pro Tennis Championships tennis tournament and was played on outdoor green clay courts at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States from August 19 through August 25, 1975. The draw comprised 64 players and two of them were seeded. First-seeded Björn Borg was the defending U.S. Pro Tennis Championships singles champion and retained his title by defeating second-seeded Guillermo Vilas in the final, 6–3, 6–4, 6–2.[1] [2] [3]