1984 Cork Junior A Football Championship

The 1984 Cork Junior A Football Championship was the 86th staging of the Cork Junior A Football Championship since its establishment by Cork County Board in 1895. The championship ran from 30 September to 4 November 1984.

The final was played on 4 November 1984 at Fr Con Buckley Park in Buttevant, between Knocknagree and Mallow, in what was their first ever meeting in the final. Knocknagree won the match by 0–13 to 1–10 to claim their first ever championship title.

Mallow's Donal Murphy was the championship's top scorer with 1-09.