| Tournament details | |
|---|---|
| County | Down |
| Province | Ulster |
| Year | 2023 |
| Trophy | Frank O'Hare Cup |
| Sponsor | Morgan Fuels |
| Teams | 16 |
| Defending champions |  Kilcoo |
| Winners | |
| Champions | Kilcoo (21st win) |
| Qualify for | 2023 Ulster Club SFC |
| Runners-up | |
| Runners-up |  Burren |
The 2023 Down Senior Football Championship was the 115th official edition of Down GAA's premier Gaelic football tournament for senior clubs in County Down. 16 teams competed, with the winning team representing Down in the Ulster Senior Club Football Championship. The tournament operates a double elimination format for the opening two rounds of the championship, with the winners and early round losers rejoining at the quarter-final stage.
Kilcoo come into the competition as defending Down champions.