British Ulster Dominion Party ended in 1982.
Ulster Democratic Party ended in 2001.
Ulster Liberal Party ended in 1987.
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.
Dominion Network ended in 1962.
Royal Ulster Constabulary ended in 2001.
Royal Ulster Rifles ended in 1968.
Ulster Protestant Action ended in 1966.
Ulster Defence Regiment ended in 1992.