The 1999 All-Ireland Under-21 Hurling Championship final was a hurling match that was played at O'Connor Park, Tullamore on 19 September 1999 to determine the winners of the 1999 All-Ireland Under-21 Hurling Championship, the 36th 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.