| Tournament details | |
|---|---|
| Province | Leinster |
| Year | 2021 |
| Trophy | Bob O'Keeffe Cup |
| Date | 26 June – 17 July 2021 |
| Teams | 6 |
| Defending champions | Kilkenny |
| Winners | |
| Champions | Kilkenny (73rd win) |
| Manager | Brian Cody |
| Captain | Adrian Mullen |
| Qualify for | Leinster SHC Final All-Ireland SHC |
| Runners-up | |
| Runners-up | Dublin |
| Promotion/Relegation | |
| Promoted team(s) | Westmeath |
| Relegated team(s) | Antrim |
| Other | |
| Matches played | 5 |
| Website | Leinster GAA |
The 2021 Leinster Senior Hurling Championship was the 2021 installment of the annual Leinster Senior Hurling Championship organised by Leinster GAA.[1] Kilkenny were the defending champions and eventual champions, defeating Dublin in the final.[2][3]