| Competition: | Hong Kong First Division |
| Season: | 1965–66 |
| Winners: | South China |
| Relegated: | Kitchee Kwong Wah |
| Matches: | 132 |
| Total Goals: | 556 |
| Prevseason: | 1964–65 |
| Nextseason: | 1966–67 |
The 1965–66 Hong Kong First Division League season was the 55th since its establishment.