The 1990 Limerick Senior Hurling Championship was the 96th staging of the Limerick Senior Hurling Championship since its establishment by the Limerick County Board in 1887. The draw for the first-round fixtures took place on 6 February 1990. The championship ran from 22 July to 21 October 1990.
Ballybrown were the defending champions, however, they were defeated by Patrickswell in first round.
On 21 October 1990, Patrickswell won the championship after a 1âÂÂ15 to 1âÂÂ12 defeat of Adare in the final. It was their 12th championship title overall and their first title in two championship seasons.
Patrickswell's Gary Kirby was the championship's top scorer with 1âÂÂ31.