The 2018 Leinster Senior Football Championship was the 2018 installment of the annual Leinster Senior Football Championship organised by Leinster GAA.
Dublin, the defending champions, won their eighth consecutive championship title, defeating Laois in the final.
The Leinster championship was contested by 11 of the 12 county teams in Leinster, a province of Ireland. Kilkenny was the only county team not to compete.