The 2012 Cork Junior A Hurling Championship was the 115th staging of the Cork Junior A Hurling Championship since its establishment by the Cork County Board in 1895. The championship began on 9 September 2012 and ended on 4 November 2012.
On 4 November 2012, Kildorrery won the championship following a 2âÂÂ8 to 0âÂÂ13 defeat of Brian Dillons in a final replay at Páirc UàRinn. This was their first championship title in the grade.
Brian Dillons' John Horgan was the championship's top scorer with 2-39.