| 1891 Cork Senior Football Championship | |
| Champions: | Clondrohid |
| Count: | 1 |
| Runners-Up: | Nils |
| Previous Year: | 1890 |
| Previous Tournament: | 1890 Cork Senior Football Championship |
| Next Year: | 1892 |
| Next Tournament: | 1892 Cork Senior Football Championship |
The 1891 Cork Senior Football Championship was the fifth staging of the Cork Senior Football Championship since its establishment by the Cork County Board in 1887.
Clondrohid won the championship following a 3–05 to 0–02 defeat of Nils in the final.[1] This was their first ever championship title.