The 2003–04 Hellenic Football League season was the 51st in the history of the Hellenic Football League, a football competition in England.
| Competition: | Hellenic Football League Premier Division |
| Season: | 2003–04 |
| Winners: | Brackley Town |
| Promoted: | Brackley Town |
| Relegated: | Hook Norton |
| Matches: | 462 |
| Total Goals: | 1381 |
| Prevseason: | 2002–03 |
| Nextseason: | 2004–05 |
Premier Division featured 19 clubs which competed in the division last season, along with three new clubs:
| Competition: | Hellenic Football League Division One East |
| Season: | 2003–04 |
| Winners: | Wantage Town |
| Promoted: | Wantage Town Milton United |
| Matches: | 272 |
| Total Goals: | 936 |
| Prevseason: | 2002–03 |
| Nextseason: | 2004–05 |
Division One East featured 14 clubs which competed in the division last season, along with three clubs:
| Competition: | Hellenic Football League Division One West |
| Season: | 2003–04 |
| Winners: | Purton |
| Promoted: | Ardley United Witney United |
| Matches: | 306 |
| Total Goals: | 1014 |
| Prevseason: | 2002–03 |
| Nextseason: | 2004–05 |
Division One West featured 17 clubs which competed in the division last season, along with one new club: