The 2008–09 United Counties League season was the 102nd in the history of the United Counties League, a football competition in England.
| Competition: | United Counties League Premier Division |
| Season: | 2008–09 |
| Winners: | Stewarts & Lloyds Corby |
| Relegated: | Potton United |
| Matches: | 420 |
| Total Goals: | 1378 |
| Prevseason: | 2007–08 |
| Nextseason: | 2009–10 |
The Premier Division featured 19 clubs which competed in the division last season, along with two new clubs, promoted from Division One:
| Competition: | United Counties League Division One |
| Season: | 2008–09 |
| Winners: | Peterborough Northern Star |
| Promoted: | Daventry United |
| Matches: | 240 |
| Total Goals: | 908 |
| Prevseason: | 2007–08 |
| Nextseason: | 2009–10 |
Division One featured 14 clubs which competed in the division last season, along with two new clubs, relegated from the Premier Division: