The 1977–78 Hellenic Football League season was the 25th in the history of the Hellenic Football League, a football competition in England.
| Competition: | Hellenic Football League Premier Division |
| Season: | 1977–78 |
| Winners: | Chipping Norton Town |
| Relegated: | Cirencester Town Thatcham Town |
| Matches: | 240 |
| Total Goals: | 739 |
| Prevseason: | 1976–77 |
| Nextseason: | 1978–79 |
The Premier Division featured 13 clubs which competed in the division last season, along with three new clubs, promoted from Division One:
| Competition: | Hellenic Football League Division One |
| Season: | 1977–78 |
| Promoted: | Bicester Town Garrard Athletic |
| Prevseason: | 1976–77 |
| Nextseason: | 1978–79 |
The Division One featured 12 clubs which competed in the division last season, along with 4 new clubs: