The 1998 All-Ireland Under-21 Hurling Championship final was a hurling match that was played at Semple Stadium, Thurles on 20 September 1998 to determine the winners of the 1998 All-Ireland Under-21 Hurling Championship, the 35th 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.