The 1991 All-Ireland Minor Hurling Championship was the 61st staging of the All-Ireland Minor Hurling Championship since its establishment by the Gaelic Athletic Association in 1928. The championship began on 16 April 1991 and ended on 1 September 1991.
Kilkenny entered the championship as the defending champions.
On 1 September 1991, Kilkenny won the championship following a 0-15 to 1-10 defeat of Tipperary in the All-Ireland final. This was their second All-Ireland title in-a-row and their 14th title overall.
Kilkenny's P. J. Delaney was the championship's top scorer with 2-29.
First round
Semi-finals
Final
First round
Semi-finals
Final
Semi-final
Final
Semi-finals
Final