2021 Cork Senior A Football Championship
The 2021 Cork Senior A Football Championship was the second staging of the Cork Senior A Football Championship since its establishment by the Cork County Board. The draw for the group stage placings took place on 29 April 2021. The championship began on 3 September 2021 and ended on 28 November 2021.
The final was played on 28 November 2021 at Páirc Uí Chaoimh in Cork, between Mallow and St. Michael's, in what was their first meeting in a final in this grade. Mallow won the match by 2-12 to 0-15 to claim their first championship title.
Mark Buckley was the championship's top scorer with 1-24.
Team changes
To Championship
Promoted from the Cork Premier Intermediate Football ChampionshipRelegated from the Cork Premier Senior Football Championship
From Championship
Promoted to the Cork Premier Senior Football ChampionshipRelegated to the Cork Premier Intermediate Football Championship
Knockout stage
Top scorers
;Overall| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | Mark Buckley | Dohenys | 1-24 | 27 | 5 | 5.40 |
| 2 | Ben Seartan | Béal Átha'n Ghaorthaidh | 2-18 | 24 | 5 | 4.80 |
| 3 | Keith White | Dohenys | 1-20 | 23 | 5 | 4.60 |
| 4 | Arthur Coakley | Bantry Blues | 1-19 | 22 | 4 | 5.50 |
| 5 | Fintan O'Connor | Knocknagree | 2-15 | 21 | 4 | 5.25 |
| 7 | Kevin Sheehan | Mallow | 0-19 | 19 | 5 | 3.80 |
| 6 | Simon Collins | Bishopstown | 1-15 | 18 | 4 | 4.50 |
| 7 | Eoin Walsh | Clyda Rovers | 1-14 | 17 | 4 | 4.25 |
| 9 | Barry Collins | Bandon | 0-16 | 16 | 3 | 5.33 |
| 10 | Seán McDonnell | Mallow | 3-04 | 13 | 5 | 2.60 |
;In a single game
| Rank | Player | Club | Tally | Total | Opposition |
| 1 | Mark Buckley | Dohenys | 0-10 | 10 | St. Michael's |
| 2 | Fintan O'Connor | Knocknagree | 1-06 | 9 | Bishopstown |
| 3 | Arthur Coakley | Bantry Blues | 1-05 | 8 | Bishopstown |
| 3 | Mark Buckley | Dohenys | 1-05 | 8 | Knocknagree |
| 3 | Ben Seartan | Béal Átha'n Ghaorthaidh | 1-05 | 8 | Bandon |
| 3 | Kevin Davis | O'Donovan Rossa | 0-08 | 8 | Bandon |
| 3 | Tadhg Deasy | St. Michael's | 0-08 | 8 | Mallow |
| 8 | Keith White | Dohenys | 1-04 | 7 | Béal Átha'n Ghaorthaidh |
| 8 | Kevin Sheehan | Mallow | 0-07 | 7 | Fermoy |
| 8 | Keith White | Dohenys | 0-07 | 7 | Bandon |
| 8 | Eoin Walsh | Clyda Rovers | 0-07 | 7 | Bantry Blues |