2003 Antrim Senior Hurling Championship

The 2003 Antrim Senior Hurling Championship was the 103rd staging of the Antrim Senior Hurling Championship since its establishment by the Antrim County Board in 1901.
Cuchullians Dunloy entered the championship as the defending champions.
The [|final] was played on 5 October 2003 at Casement Park in Belfast, between Cuchullians Dunloy and Loughgiel Shamrocks, in what was their second meeting in the final overall. Cuchullians Dunloy won the match by 1–16 to 2–12 to claim their ninth championship title overall and a record fourth consecutive title.