The 2004–05 United Counties League season was the 98th in the history of the United Counties League, a football competition in England.
| Competition: | United Counties League Premier Division |
| Season: | 2004–05 |
| Winners: | Cogenhoe United |
| Relegated: | Daventry Town |
| Matches: | 462 |
| Total Goals: | 1510 |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
The Premier Division featured 21 clubs which competed in the division last season, along with one new club:
| Competition: | United Counties League Division One |
| Season: | 2004–05 |
| Winners: | Northampton Sileby Rangers |
| Promoted: | St Ives Town |
| Matches: | 306 |
| Total Goals: | 1069 |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
Division One featured 17 clubs which competed in the division last season, along with one new club:
Also, Cottingham changed name to Corby Cottingham.