2021 Kilkenny Senior Hurling Championship
The 2021 Kilkenny Senior Hurling Championship was the 127th staging of the Kilkenny Senior Hurling Championship since its establishment by the Kilkenny County Board in [1887 Kilkenny (city)|Kilkenny Senior Hurling Championship|1887]. The championship began on 2 October 2021 and ended on 7 November 2021.
Ballyhale Shamrocks entered the championship as the defending champions. Rower-Inistioge were relegated from the championship after being beaten in a playoff by Erin's Own.
The final was played on 7 November 2021 at UPMC Nowlan Park in Kilkenny, between Ballyhale Shamrocks and O'Loughlin Gaels, in what was their first meeting in a final in five years. Ballyhale Shamrocks won the match by 3–19 to 3–15 to claim their 19th championship title overall and a fourth title in succession.
T. J. Reid was the championship's top scorer with 1-31.
Team changes
To Championship
Promoted from the Kilkenny Intermediate Hurling ChampionshipFrom Championship
Relegated to the Kilkenny Intermediate Hurling ChampionshipChampionship statistics
Top scorers
;Overall| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | T. J. Reid | Ballyhale Shamrocks | 1-31 | 34 | 4 | 8.50 |
| 2 | Shane Walsh | Tullaroan | 0-31 | 31 | 3 | 10.33 |
| 3 | Mark Bergin | O'Loughlin Gaels | 1-26 | 29 | 4 | 7.25 |
| 4 | Seán Ryan | Graigue-Ballycallan | 2-16 | 22 | 2 | 11.00 |
| 4 | Jack Buggy | Erin's Own | 2-16 | 22 | 3 | 7.33 |
| 6 | Jack Walsh | Rower-Inistioge | 0-21 | 21 | 3 | 7.00 |
| 7 | Paddy Deegan | O'Loughlin Gaels | 3-11 | 20 | 4 | 5.00 |
| 8 | Aidan Tallis | Lisdowney | 3-10 | 19 | 2 | 9.50 |
| 9 | Owen Wall | O'Loughlin Gaels | 4-05 | 17 | 4 | 4.25 |
| 9 | Shane Stapleton | Dicksboro | 0-17 | 17 | 2 | 8.50 |
;In a single game
| Rank | Player | Club | Tally | Total | Opposition |
| 1 | T. J. Reid | Ballyhale Shamrocks | 1-11 | 14 | James Stephens |
| 2 | Aidan Tallis | Lisdowney | 3-04 | 13 | Rower-Inistioge |
| 2 | Mark Bergin | O'Loughlin Gaels | 1-10 | 13 | Mullinavat |
| 4 | Seán Ryan | Graigue-Ballycallan | 1-09 | 12 | Ballyhale Shamrocks |
| 5 | Jack Buggy | Erin's Own | 2-05 | 11 | Tullaroan |
| 6 | Seán Ryan | Graigue-Ballycallan | 1-07 | 10 | Erin's Own |
| 6 | Shane Stapleton | Dicksboro | 0-10 | 10 | Lisdowney |
| 6 | John Walsh | Mullinavat | 0-10 | 10 | O'Loughlin Gaels |
| 6 | Shane Walsh | Tullaroan | 0-10 | 10 | O'Loughlin Gaels |
| 10 | Paddy Deegan | O'Loughlin Gaels | 2-03 | 9 | Ballyhale Shamrocks |
| 10 | Jack Walsh | Rower-Inistioge | 0-09 | 9 | O'Loughlin Gaels |
| 10 | Shane Walsh | Tullaroan | 0-09 | 9 | Erin's Own |
| 10 | Mark Bergin | O'Loughlin Gaels | 0-09 | 9 | Tullaroan |
| 10 | T. J. Reid | Ballyhale Shamrocks | 0-09 | 9 | O'Loughlin Gaels |