1989 Cork Senior Football Championship
The 1989 Cork Senior Football Championship was the 101st staging of the Cork Senior Football Championship since its establishment by the Cork County Board in 1887. The draw for the opening round fixtures took place on 18 December 1988. The championship began on 16 April 1989 and ended on 29 October 1989.
Nemo Rangers entered the championship as the defending champions, however, they were defeated by St. Finbarr's in a semi-final replay.
On 29 October 1989, Castlehaven won the championship following a 0-09 to 0-07 defeat of St. Finbarr's in the final. This was their first championship title.
Eoin O'Mahony from the Nemo Rangers club was the championship's top scorer with 2-14.To Championship
Promoted from the Cork Intermediate Football Championship
Regraded to the Cork Intermediate Football Championship
First round
Second round
Quarter-finals
Semi-finals
Final
Top scorers
;Top scorers overall
| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | Eoin O'Mahony | Nemo Rangers | 2-14 | 20 | 4 | 5.00 |
| 2 | Larry Tompkins | Castlehaven | 0-18 | 18 | 4 | 4.50 |
| 3 | Dave Barry | St. Finbarr's | 0-17 | 17 | 5 | 3.40 |
| 4 | Mick McCarthy | O'Donovan Rossa | 0-13 | 13 | 2 | 6.50 |
| 4 | Mick Mullins | Na Piarsaigh | 0-13 | 13 | 3 | 4.66 |
;Top scorers in a single game
| Rank | Player | Club | Tally | Total | Opposition |
| 1 | Eoin O'Mahony | Nemo Rangers | 1-06 | 9 | Avondhu |
| 2 | Mick McCarthy | O'Donovan Rossa | 0-08 | 8 | Na Piarsaigh |
| 2 | Mick Mullins | Na Piarsaigh | 0-08 | 8 | O'Donovan Rossa |
| 2 | Barry Harte | Carbery | 0-08 | 8 | Castlehaven |
| 3 | Larry Tompkins | Castlehaven | 0-07 | 7 | Carbery |
| 3 | Dave Barry | St. Finbarr's | 0-07 | 7 | UCC |
| 3 | Dave Barry | St. Finbarr's | 0-07 | 7 | Nemo Rangers |
| 4 | John Caulfield | Carbery | 1-03 | 6 | Kilshannig |
| 4 | - | - | - | - | - |
| 4 | - | - | - | - | - |
