| 1890 Cork Senior Hurling Championship | |
| Teams: | 19 |
| Dates: | 9 March 1890 – 13 July 1890 |
| Champions: | Aghabullogue |
| Champions Captain: | Dan Lane |
| Count: | 1 |
| Runners-Up: | Aghada |
| Runners-Up Captain: | Dan Higgins |
| Previous Year: | 1889 |
| Previous Tournament: | 1889 Cork Senior Hurling Championship |
| Next Year: | 1891 |
| Next Tournament: | 1891 Cork Senior Hurling Championship |
The 1890 Cork Senior Hurling Championship was the fourth 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 on 18 February 1890. The championship began on 9 March 1890 and ended on 13 July 1890.
Blackrock were the defending champions.
On 13 July 1890, Aghabullogue won the championship following a 7–3 to 1–1 defeat of Aghada in the final.[1] This remains their only championship title.
Final