The 1964–65 Hellenic Football League season was the 12th in the history of the Hellenic Football League, a football competition in England.
| Competition: | Hellenic Football League Premier Division |
| Season: | 1964–65 |
| Winners: | Witney Town |
| Relegated: | Henley Town Hungerford Town |
| Matches: | 306 |
| Total Goals: | 1408 |
| Prevseason: | 1963–64 |
| Nextseason: | 1965–66 |
The Premier Division featured 16 clubs which competed in the division last season, along with two new clubs, promoted from Division One:
Also, Yiewsley reserves changed name to Hillingdon Borough reserves.
| Competition: | Hellenic Football League Division One |
| Season: | 1964–65 |
| Winners: | Thatcham |
| Promoted: | Thatcham Waddesdon |
| Matches: | 240 |
| Total Goals: | 1178 |
| Prevseason: | 1963–64 |
| Nextseason: | 1965–66 |
The Division One featured 7 clubs which competed in the division last season, along with 9 new club: