1990 Cork Senior Hurling Championship
The 1990 Cork Senior Hurling Championship was the 102nd staging of the Cork Senior Hurling Championship since its establishment by the Cork County Board in 1887. The championship ended on 1 October 1989.
Glen Rovers entered the championship as the defending champions.
On 21 October 1990, Na Piarsaigh won the championship following a 2-7 to 1-8 defeat of St. Finbarr's in a replay of the final. This was their first championship title.Results
First round
Second round
Quarter-finals
Semi-finals
FinalsChampionship statistics
Top scorers
;Overall
| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | Brian Cunningham | St. Finbarr's | 2-28 | 34 | 5 | 6.80 |
| 2 | Mark Mullins | Na Piarsaigh | 1-22 | 25 | 4 | 6.25 |
| 3 | Christy Ryan | St. Finbarr's | 3-08 | 17 | 5 | 3.40 |
| 4 | John Fenton | Midleton | 1-12 | 15 | 2 | 7.50 |
| 5 | Paddy Harte | Carbery | 3-05 | 14 | 4 | 3.50 |
;In a single game
| Rank | Player | Club | Tally | Total | Opposition |
| 1 | Mark Mullins | Na Piarsaigh | 1-12 | 15 | Blackrock |
| 2 | Jessie O'Callaghan | Duhallow | 3-00 | 9 | Muskerry |
| 2 | Brian Cunningham | St. Finbarr's | 1-06 | 9 | Carbery |
| 2 | John Fenton | Midleton | 1-06 | 9 | Sarsfields |
| 2 | Alex Morrissey | Ballyhea | 1-06 | 9 | Na Piarsaigh |
| 2 | Brian Cunningham | St. Finbarr's | 0-09 | 9 | Valley Rovers |
| 3 | Christy Ryan | St. Finbarr's | 2-02 | 8 | Imokilly |
| 3 | Paddy Harte | Carbery | 2-02 | 8 | Muskerry |
| 3 | John Fitzgibbon | Glen Rovers | 2-02 | 8 | UCC |
| 3 | Pat Flynn | Muskerry | 2-02 | 8 | Duhallow |
