| 1990 Cork Senior Football Championship | |
| Dates: | 20 April – 4 November 1990 |
| Teams: | 21 |
| Champions: | Duhallow |
| Count: | 2 |
| Champions Captain: | Danny Culloty |
| Champions Manager: | John Fintan Daly |
| Runners-Up: | St. Finbarr's |
| Runners-Up Captain: | Christy Ryan |
| Runners-Up Manager: | Donal Murray |
| Matches: | 23 |
| Goals: | 48 |
| Points: | 433 |
| Top Scorer: | Colm O'Neill (0-21) Dave Barry (0-21) |
| Previous Year: | 1989 |
| Previous Tournament: | 1989 Cork Senior Football Championship |
| Next Year: | 1991 |
| Next Tournament: | 1991 Cork Senior Football Championship |
The 1990 Cork Senior Football Championship was the 102nd 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 17 December 1989. The championship began on 20 April 1990 and ended on 4 November 1990.
Castlehaven entered the championship as the defending champions, however, they were defeated by Muskerry in the second round.[1]
On 4 November 1990, Duhallow won the championship following an 0-08 to 0-06 defeat of St. Finbarr's in the final.[2] This was their second championship title overall and their first title since 1936.
Colm O'Neill and Dave Barry were the championship's joint top scorers with 0-21.
Promoted from the Cork Intermediate Football Championship
| Rank | Player | Club | Tally | Total | Matches | Average |
|---|---|---|---|---|---|---|
| 1 | Colm O'Neill | Imokilly | 0-21 | 21 | 3 | 7.00 |
| Dave Barry | St. Finbarr's | 0-21 | 21 | 5 | 4.20 | |
| 3 | Tony Power | St. Finbarr's | 3-07 | 16 | 5 | 3.20 |
| Mick McCarthy | O'Donovan Rossa | 2-10 | 16 | 2 | 8.00 | |
| 5 | John Caulfield | Carbery | 1-10 | 13 | 4 | 3.25 |
| Niall O'Connor | Duhallow | 0-13 | 13 | 4 | 3.25 | |
| 7 | Dinny Allen | Nemo Rangers | 2-04 | 10 | 4 | 2.50 |
| Denis O'Sullivan | Nemo Rangers | 0-10 | 10 | 4 | 2.50 | |
| 9 | Ciarán O'Sullivan | Beara | 1-06 | 9 | 2 | 4.50 |
| William O'Riordan | Kilshannig | 1-06 | 9 | 2 | 4.50 | |
| Stephen Calnan | Nemo Rangers | 0-09 | 9 | 4 | 2.25 |
| Rank | Player | Club | Tally | Total | Opposition |
|---|---|---|---|---|---|
| 1 | Mick McCarthy | O'Donovan Rossa | 1-06 | 9 | Glanmire |
| Colm O'Neill | Imokilly | 0-09 | 9 | Na Piarsaigh | |
| 3 | Tony Power | St. Finbarr's | 2-02 | 8 | St. Nicholas' |
| Ciarán O'Sullivan | Beara | 1-05 | 8 | Seandún | |
| Dave Barry | St. Finbarr's | 0-08 | 8 | St. Nicholas' | |
| 6 | William O'Riordan | Kilshannig | 1-04 | 7 | Na Piarsaigh |
| John Cleary | Castlehaven | 1-04 | 7 | Muskerry | |
| John Caulfield | Carbery | 1-04 | 7 | St. Finbarr's | |
| Mick McCarthy | O'Donovan Rossa | 1-04 | 7 | Duhallow | |
| Colm O'Neill | Imokilly | 0-07 | 7 | Nemo Rangers | |
| Niall O'Connor | Duhallow | 0-07 | 7 | Carrigdhoun |