Liberal Unionist Party was created in 1886.
Liberal Unionist Party ended in 1912.
UK Unionist Party was created in 1995.
Progressive Unionist Party was created in 1979.
Protestant Unionist Party was created in 1966.
United Ulster Unionist Party was created in 1975.
Unionist Party - South Africa - was created in 1910.
National Progressive Unionist Party was created in 1977.
Ulster Unionist Coalition Party was created in 2007.
Ulster Popular Unionist Party was created in 1980.
Democratic Unionist Party was created on 1971-09-30.
Vanguard Unionist Progressive Party was created in 1972-02.
Unionist Party of Northern Ireland was created in 1974-09.