The 2021 Cork Intermediate A Football Championship was the 86th staging of the Cork Intermediate A Football Championship since its establishment by the Cork County Board in 1909. The draw for the group stage placings took place on 29 April 2021. The championship began on 4 September 2021 and ended on 5 December 2021.
The final was played on 5 December 2021 at Páirc UàChaoimh in Cork, between Iveleary and Mitchelstown, in what was their first ever meeting in a final. Iveleary won the match by 0-20 to 0-07 to claim their first ever championship title.
Iveleary's Chris ÃÂg Jones was the championship's top scorer with 5-38.
Promoted from the Cork Junior A Football Championship
Relegated from the Cork Premier Intermediate Football Championship
Promoted to the Cork Premier Intermediate Football Championship
Relegated to the City Junior A Football Championship