The 2009 All-Ireland Under-21 Hurling Championship final was a hurling match that was played at Croke Park, Dublin on 13 September 2009 to determine the winners of the 2009 All-Ireland Under-21 Hurling Championship, the 46th 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. The final was contested by Clare of Munster and Kilkenny of Leinster, with Clare winning by 0-15 to 0-14. Kilkenny's defeat was a record-equaling tenth in an All-Ireland final.