The 2023 Leinster Senior Hurling Championship was the 2023 installment of the annual Leinster Senior Hurling Championship organised by Leinster GAA. Kilkenny were the defending champions having defeated Galway in the 2022 final.
Each team plays each other once. The 1st and 2nd placed teams advance to the Leinster final and the 3rd placed team advances to the all-Ireland preliminary quarter-finals. All other teams are eliminated from the championship and the bottom placed team may face relegation to next years Joe McDonagh Cup.
The top 2 teams in the group stage contest this game. The Leinster champions advance to the All-Ireland semi-finals and the Leinster runners-up advance to the All-Ireland quarter-finals.
Promoted from the Joe McDonagh Cup
Relegated to the Joe McDonagh Cup
Six counties will compete in the Leinster Senior Hurling Championship: