The 2018 Ulster Senior Football Championship was the 130th instalment of the annual Ulster Senior Football Championship organised by Ulster GAA. It is one of the four provincial competitions of the 2018 All-Ireland Senior Football Championship. The winners receive The Anglo-Celt Cup. The draw for the championship was made on 19 October 2017.
Tyrone were the defending champions, though were eliminated in the quarter-finals. The championship was won by Donegal who defeated Fermanagh in the final. Donegal full-forward Patrick McBrearty suffered a season-ending cruciate ligament injury in the final. DUP leader Arlene Foster notably attended the final.
The Ulster championship is contested by the nine county teams in the province of Ulster.