The 1990 Antrim Senior Hurling Championship was the 90th staging of the Antrim Senior Hurling Championship since its establishment by the Antrim County Board in 1901.
Loughgiel Shamrocks entered the championship as the defending champions.
The final, a replay, was played on 7 October 1990 at Casement Park in Belfast, between Cuchullians Dunloy and O'Donovan Rossa, in what was their second meeting in the final overall. Cuchullians Dunloy won the match by 2âÂÂ10 to 1âÂÂ10 to claim their first ever championship title.