The 1988–89 United Counties League season was the 82nd in the history of the United Counties League, a football competition in England.
| Competition: | United Counties League Premier Division |
| Season: | 1988–89 |
| Winners: | Potton United |
| Matches: | 380 |
| Total Goals: | 1090 |
| Prevseason: | 1987–88 |
| Nextseason: | 1989–90 |
The Premier Division featured 19 clubs which competed in the division last season, along with one new club:
| Competition: | United Counties League Division One |
| Season: | 1988–89 |
| Winners: | Ramsey Town |
| Promoted: | Burton Park Wanderers |
| Matches: | 342 |
| Total Goals: | 1083 |
| Prevseason: | 1987–88 |
| Nextseason: | 1989–90 |
Division One featured 19 clubs which competed in the division last season, no new clubs joined the division this season.