The 1991 Limerick Senior Hurling Championship was the 97th staging of the Limerick Senior Hurling Championship since its establishment by the Limerick County Board in 1887. The championship ran from 21 June to 6 October 1991.
Patrickswell were the defending champions, however, they were beaten by Ballybrown in the quarter-finals.
On 6 October 1991, Ballybrown won the championship after a 1âÂÂ11 to 1âÂÂ10 defeat of Kilmallock in the final. It was their second championship title overall and their second title in two championship seasons.
Kilmallock's Paddy Kelly was the championship's top scorer with 4âÂÂ35.