1921 All-Ireland Senior Hurling Championship

The All-Ireland Senior Hurling Championship 1921 was the 35th series of the All-Ireland Senior Hurling Championship, Ireland's premier hurling knock-out competition. Limerick won the championship, beating Dublin 8-5 to 3-2 in the final.

Format
All-Ireland Championship

Semi-final: (1 match) This was a lone match which saw the winners of the Munster championship play Galway who received a bye to this stage. One team was eliminated at this stage while the winning team advanced to the final.

Final: (1 match) The winners of the lone semi-final played the winners of the Leinster championship. The winners were declared All-Ireland champions.