Ulster Rugby is one of the four professional provincial rugby teams from the island of Ireland. They compete in the United Rugby Championship and the European Rugby Champions Cup. The team represents the IRFU Ulster Branch, which is one of the four primary branches of the IRFU and is responsible for rugby union throughout the geographical Irish province of Ulster, comprising Northern Ireland (Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone) and three counties in the Republic of Ireland which are Donegal, Monaghan and Cavan.