The 1984 All-Ireland Under-21 Hurling Championship final was a hurling match that was played at Walsh Park, Waterford on 22 August 1981 to determine the winners of the 1984 All-Ireland Under-21 Hurling Championship, the 20th 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.