The 2015 Mayo Senior Football Championship was the 114th edition of the Mayo GAA's premier club Gaelic football tournament for senior graded teams in County Mayo, Ireland. The tournament consists of 16 teams, with the winner going on to represent Mayo in the Connacht Senior Club Football Championship. The championship starts with a group stage and then progresses to a knock out stage. Ballintubber were the defending champions after they defeated Castlebar Mitchels in the previous years final, however they lost their crown at the Semi-Final stage, being defeated by Breaffy.