2003 Kilkenny Senior Hurling Championship
The 2003 Kilkenny Senior Hurling Championship was the 109th staging of the Kilkenny Senior Hurling Championship since its establishment by the Kilkenny County Board in 1887. The championship began on 25 July 2003 and ended on 2 November 2003.
Young Irelands were the defending champions.
On 2 November 2003, O'Loughlin Gaels won the title after a 2-12 to 2-10 defeat of Young Irelands in a final replay at Nowlan Park. It was their second championship title overall and their first title in two championship seasons.To Championship
Promoted from the Kilkenny Intermediate Hurling Championship
- St. Martin's
From Championship
Relegated to the Kilkenny Intermediate Hurling Championship
First round
Relegation play-off
Quarter-finals
Semi-finals
Final
Championship statistics
Top scorers
;Top scorers overall
| Rank | Player | Club | Tally | Total | Matches | Average |
| 1 | Nigel Skehan | O'Loughlin Gaels | 5-22 | 37 | 4 | 9.25 |
| 2 | D. J. Carey | Young Irelands | 3-18 | 27 | 4 | 6.75 |
| 3 | Joe Murray | James Stephens | 0-25 | 25 | 3 | 8.33 |
