British Ulster Dominion Party ended in 1982.
Ulster Liberal Party ended in 1987.
Ulster Democratic Party ended in 2001.
United Ulster Unionist Party ended in 1984.
Ulster Popular Unionist Party ended in 1995.
British Democratic Party ended in 1982.
British Socialist Party ended in 1920.
Ulster Railway ended in 1876.
Ulster Protestant Action ended in 1966.
Ulster Defence Regiment ended in 1992.
New Ulster Movement ended in 1978.
New Ulster Province ended in 1853.
Royal Ulster Constabulary ended in 2001.