| 1966 Waterford Senior Hurling Championship | |
| Champions: | Ballygunner |
| Count: | 1 |
| Runners-Up: | Mount Sion |
| Previous Year: | 1965 |
| Previous Tournament: | 1965 Waterford Senior Hurling Championship |
| Next Year: | 1967 |
| Next Tournament: | 1967 Waterford Senior Hurling Championship |
The 1966 Waterford Senior Hurling Championship was the 66th staging of the Waterford Senior Hurling Championship since its establishment by the Waterford County Board in 1897.
Mount Sion were the defending champions.
On 13 November 1966, Ballygunner won the championship after a 2–06 to 2–03 defeat of Mount Sion in the final.[1] This was their first ever championship title.