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. 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 Championship Macroom

From Championship

Regraded to the Cork Intermediate Football Championship Rockchapel

Results First round

Second round

Quarter-finals

Semi-finals

Final

Championship statistics Top scorers

Overall

Rank Player Club Tally Total Matches Average1Maurice FitzgeraldUCC2-162237.332Niall O'ConnorDuhallow2-152154.203Mick McCarthyO'Donovan Rossa3-112036.66Barry HarteCarbery0-202054.005Tony LeahySt. Finbarr's0-191944.756Jimmy DennehyDuhallow0-181853.607Jason WhooleyCarbery3-051434.668Michael BarrySt. Finbarr's3-041352.60Joe KavanaghNemo Rangers1-101334.6610Tony PowerSt. Finbarr's1-081152.20John MorganImokilly0-111133.66

In a single game

Rank Player Club Tally Total Opposition1Diarmuid LynchMuskerry2-039UCCMick McCarthyO'Donovan Rossa2-039Na PiarsaighGary O'SullivanSt. Nicholas'2-039BearaJason WhooleyCarbery2-039BearaMaurice FitzgeraldUCC1-069Muskerry6Mick McCarthyO'Donovan Rossa1-058St. Finbarr'sMaurice FitzgeraldUCC1-058Duhallow8John BradyO'Donovan Rossa2-017Na PiarsaighWilliam O'RiordanKilshannig2-017ClonakiltyMichael BarrySt. Finbarr's2-017O'Donovan Rossa

References