The 1939 Cork Junior Hurling Championship was the 42nd staging of the Cork Junior Hurling Championship since its establishment by the Cork County Board.
On 13 November 1939, Cloyne won the championship following a 6âÂÂ05 to 3âÂÂ03 defeat of Mayfield in the final at Midleton Sportsfield. It was their first ever championship title.