1991 Cork Senior Football Championship
The 1991 Cork Senior Football Championship was the 103rd staging of the Cork Senior Football Championship since its establishment by the Cork County Board in [1887 Cork (city)|Cork Senior Football Championship|1887]. The draw for the opening fixtures took place on 16 December 1990. The championship ran from 20 April to 6 October 1991.
Duhallow entered the championship as the defending champions.
The final was played on 6 October 1991 at Páirc Uí Chaoimh in Cork, between Duhallow and St. Finbarr's, in what was their third ever meeting in the final and their second meeting in succession. Duhallow won the match by 0-11 to 0-10 to claim their third championship title overall and a second title in succession..
University College Cork's Maurice Fitzgerald was the championship's top scorer with 2-16.
Team changes
To Championship
Promoted from the Cork Intermediate Football ChampionshipFrom Championship
Regraded to the Cork Intermediate Football ChampionshipChampionship statistics
Top scorers
;Overall| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | Maurice Fitzgerald | UCC | 2-16 | 22 | 3 | 7.33 |
| 2 | Niall O'Connor | Duhallow | 2-15 | 21 | 5 | 4.20 |
| 3 | Mick McCarthy | O'Donovan Rossa | 3-11 | 20 | 3 | 6.66 |
| 3 | Barry Harte | Carbery | 0-20 | 20 | 5 | 4.00 |
| 5 | Tony Leahy | St. Finbarr's | 0-19 | 19 | 4 | 4.75 |
| 6 | Jimmy Dennehy | Duhallow | 0-18 | 18 | 5 | 3.60 |
| 7 | Jason Whooley | Carbery | 3-05 | 14 | 3 | 4.66 |
| 8 | Michael Barry | St. Finbarr's | 3-04 | 13 | 5 | 2.60 |
| 8 | Joe Kavanagh | Nemo Rangers | 1-10 | 13 | 3 | 4.66 |
| 10 | Tony Power | St. Finbarr's | 1-08 | 11 | 5 | 2.20 |
| 10 | John Morgan | Imokilly | 0-11 | 11 | 3 | 3.66 |
;In a single game
| Rank | Player | Club | Tally | Total | Opposition |
| 1 | Diarmuid Lynch | Muskerry | 2-03 | 9 | UCC |
| 1 | Mick McCarthy | O'Donovan Rossa | 2-03 | 9 | Na Piarsaigh |
| 1 | Gary O'Sullivan | St. Nicholas' | 2-03 | 9 | Beara |
| 1 | Jason Whooley | Carbery | 2-03 | 9 | Beara |
| 1 | Maurice Fitzgerald | UCC | 1-06 | 9 | Muskerry |
| 6 | Mick McCarthy | O'Donovan Rossa | 1-05 | 8 | St. Finbarr's |
| 6 | Maurice Fitzgerald | UCC | 1-05 | 8 | Duhallow |
| 8 | John Brady | O'Donovan Rossa | 2-01 | 7 | Na Piarsaigh |
| 8 | William O'Riordan | Kilshannig | 2-01 | 7 | Clonakilty |
| 8 | Michael Barry | St. Finbarr's | 2-01 | 7 | O'Donovan Rossa |