2003 All-Ireland Under-21 Hurling Championship
| All Ireland Champions | |
|---|---|
| Winners | Kilkenny (8th win) |
| Captain | Jackie Tyrrell |
| All Ireland Runners-up | |
| Runners-up | Tipperary |
| Provincial Champions | |
| Munster | Tipperary |
| Leinster | Kilkenny |
| Ulster | Down |
| Connacht | Not Played |
|
← 2002 2004 → | |
The 2003 Erin Foods All-Ireland Under-21 Hurling Championship was the 40th staging of Ireland's hurling knock-out competition for players aged between 18 and 21. Kilkenny won the championship, beating Galway 2-13 to 0-12 in the final.
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