| 1940 Cork Senior Hurling Championship | |
| Dates: | 10 March 1940 – 29 September 1940 |
| Teams: | 9 |
| Champions: | Glen Rovers |
| Count: | 7 |
| Champions Captain: | Jack Lynch |
| Runners-Up: | Sarsfields |
| Matches: | 10 |
| Goals: | 86 |
| Points: | 73 |
| Previous Year: | 1939 |
| Previous Tournament: | 1939 Cork Senior Hurling Championship |
| Next Year: | 1941 |
| Next Tournament: | 1941 Cork Senior Hurling Championship |
The 1940 Cork Senior Hurling Championship was the 52nd staging of the Cork Senior Hurling Championship since its establishment by the Cork County Board in 1887. The draw for the opening round fixtures took place at the Cork Convention on 28 January 1940. The championship began on 10 March 1940 and ended on 29 September 1940.
Glen Rovers were the defending champions.
On 29 September 1940, Glen Rovers won the championship following a 10–6 to 7–5 defeat of Sarsfields in the final. This was their seventh championship title and the seventh of eight successive championships.[1]