1931 Cork Junior Hurling Championship

The 1931 Cork Junior Hurling Championship was the 35th staging of the Cork Junior Hurling Championship since its establishment by the Cork County Board.

On 9 November 1931, Blackrock won the championship following a 3–07 to 1–01 defeat of Skibberreen in the final at Clonakilty Sportsfield. This was their fourth championship title overall and their first title since 1910.