Kilkenny came into the season as defending champions of the 2002 season. Laois entered Division 1 as the promoted team.
On 5 May 2003, Kilkenny won the title following a 5–14 to 5–13 win over Tipperary in the final.[1] It was their second league title in succession and their 11th National League title overall.
Derry, who lost all of their group stage matches, were relegated from Division 1 after losing all of their matches in the relegation group. Antrim won Division 2 and secured promotion to the top tier.
Tipperary's Eoin Kelly was the Division 1 top scorer with 6-56.
D Sheehan 4-2, B Begley 1-4, B Foley 1-4, TJ Ryan 0-3, M Keane 0-3, E Foley 0-1, P Lawlor 0-1, C Carey 0-1, C Fitzgerald 0-1, J Moran 0-1, N Moran 0-1.
O Collins 0-2, G Biggs 0-2, D McGrellis 0-2, R Kennedy 0-1, P Doherty 0-1, P Quigg 0-1.
O Moran 2-1, N Moran 1-4, Michael O’Brien 1-4, P Kirby 0-5, A O’Shaughnessy 1-1, D Sheehan 0-3, J Meskell 0-3, R Hayes 0-2, J O’Brien 0-2, J Moran 0-1.
T McGrain 0-6, L Ryan 0-2, K Horgan 0-1, F Armstrong 0-1.