| 1942 Limerick Senior Hurling Championship | |
| Champions: | Ahane |
| Count: | 9 |
| Runners-Up: | Rathkeale |
| Previous Year: | 1941 |
| Previous Tournament: | 1941 Limerick Senior Hurling Championship |
| Next Year: | 1943 |
| Next Tournament: | 1943 Limerick Senior Hurling Championship |
The 1942 Limerick Senior Hurling Championship was the 48th staging of the Limerick Senior Hurling Championship since its establishment by the Limerick County Board.
Croom were the defending champions, however, they were defeated by Rathkeale in the Western Championship final.
On 18 October 1942, Ahane won the championship after a 7–08 to 1–00 defeat of Rathkeale in the final.[1] It was their ninth championship title overall and their first title in three championship seasons.