1991 All-Ireland Under-21 Hurling Championship
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.Results
Quarter-finals
Semi-finals
FinalQuarter-finals
Semi-finals
FinalSemi-finals
FinalSemi-finals
Final;Overall
| Rank | Player | County | Tally | Total | Matches | Average |
| 1 | Frankie Carroll | Limerick | 1-38 | 41 | 5 | 8.20 |
| 2 | Johnny Dooley | Offaly | 2-21 | 27 | 6 | 4.50 |
| 3 | Brian Cunningham | Cork | 1-20 | 23 | 3 | 7.66 |
| 4 | John Carson | Antrim | 2-16 | 22 | 3 | 7.33 |
| 4 | Ken Ralph | Tipperary | 2-16 | 22 | 3 | 7.33 |
| 5 | John Brady | Offaly | 5-06 | 21 | 6 | 3.50 |
