1991 All-Ireland Under-21 Hurling Championship
| Championship Details | |
|---|---|
| Dates | 12 June 1991 – 8 September 1991 | 
| Teams | 17 | 
| All Ireland Champions | |
| Winners | Galway (5th win) | 
| Captain | Brian Feeney | 
| All Ireland Runners-up | |
| Runners-up | Offaly | 
| Captain | Johnny Pilkington | 
| Provincial Champions | |
| Munster | Cork | 
| Leinster | Offaly | 
| Ulster | Antrim | 
| Connacht | Galway | 
| Championship Statistics | |
| Top Scorer | Frankie Carroll (1-38) | 
← 1990   1992 →   | |
The 1991 All-Ireland Under-21 Hurling Championship was the 28th staging of the All-Ireland Under-21 Hurling Championship since its establishment by the Gaelic Athletic Association in 1964. The championship began on 12 June 1991 and ended on 8 September 1991.
Kilkenny entered the championship as the defending champions, however, they were beaten by Offaly in the Leinster final.
On 8 September 1991, Galway won the championship following a 2-17 to 1-09 defeat of Offaly in the All-Ireland final. This was their fifth All-Ireland title overall and their first title since 1986.
Limerick's Frankie Carroll was the championship's top scorer with 1-38.