The 1975 All-Ireland Under-21 Hurling Championship was the 12th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964. The championship began on 9 April 1975 and ended on 12 October 1975.
Kilkenny entered the championship as the defending champions.
On 12 October 1975, Kilkenny won the championship following a 5-13 to 2-19 defeat of Cork in the All-Ireland final. This was their second All-Ireland title overall and their second title in succession.
Cork's ÃÂamonn O'Sullivan was the championship's top scorer with 4-09.
Quarter-finals
Semi-finals
Final
First round
Semi-finals
Final
Final
Semi-finals
Final