The 1978 All-Ireland Under-21 Hurling Championship final was a hurling match played at the Gaelic Grounds, Limerick on 8 October 1978 to determine the winners of the 1978 All-Ireland Under-21 Hurling Championship, the 15th season of the All-Ireland Under-21 Hurling Championship, a tournament organised by the Gaelic Athletic Association for the champion teams of the four provinces of Ireland.