The 1983–84 United Counties League season was the 77th in the history of the United Counties League, a football competition in England.
| Competition: | United Counties League Premier Division |
| Season: | 1983–84 |
| Winners: | Buckingham Town |
| Matches: | 342 |
| Total Goals: | 1006 |
| Prevseason: | 1982–83 |
| Nextseason: | 1984–85 |
The Premier Division featured 16 clubs which competed in the division last season, along with three new clubs:
| Competition: | United Counties League Division One |
| Season: | 1983–84 |
| Winners: | Brackley Town |
| Promoted: | Brackley Town |
| Matches: | 240 |
| Total Goals: | 715 |
| Prevseason: | 1982–83 |
| Nextseason: | 1984–85 |
Division One featured 14 clubs which competed in the division last season, along with two new clubs: