2003 Cork Senior Hurling Championship

The 2003 Cork Senior Hurling Championship was the 117th since its establishment in 1887. The first matches of the season were played in May and the championship ended on 12 October 2003. Blackrock went into the 2003 championship as three-in-a-row hopefuls, having won their 32nd county title the previous year.

The championship culminated with the county final, held at Páirc Uí Chaoimh, Cork. The match was a replay of the previous year's final and was contested by Newtownshandrum and Blackrock. Newtownshandrum won the game by 0-17 to 0-9. It was their second county title ever.