The South East Cork Under-21 A Football Championship is an annual Gaelic football competition organised by the Carrigdhoun Board of the Gaelic Athletic Association since 1966 for Under-21 Gaelic football teams in the southeastern region of County Cork, Ireland.
The title has been won at least once by 8 different clubs. The all-time record-holders are Valley Rovers, who have won a total of 21 titles.
Kinsale are the title-holders after defeating Carrigaline by 2-17 to 1-12 in the 2025 championship final.
The most successful team of each decade, judged by number of South-East Under 21A Football Championship titles, is as follows:
Top five longest gaps between successive championship titles: