The 2015 Ulster Club Senior Football Championship had reigning champions of which Gaelic club?
2015 Ulster Senior Club Football Championship:  Slaughtneil (Derry) were the reigning champions following the 2014 Championship defeat of Omagh St. Enda's (Tyrone) Slaughtneil GAC: Robert Emmet's Gaelic Athletic Club Slaughtneil (Irish: "CLG Roibeard Éiméid Sleacht Néill" ) is a Gaelic Athletic Association club based on the townland of Slaughtneil, County Londonderry, Northern Ireland.
Robert Emmet's Gaelic Athletic Club Slaughtneil