The 1986 East Londonderry by-election was one of the fifteen 1986 Northern Ireland by-elections held on 23 January 1986, to fill vacancies in the Parliament of the United Kingdom caused by the resignation in December 1985 of all sitting Unionist Members of Parliament (MPs).
The East Londonderry by-election in 1986 was one among fifteen Northern Ireland by-elections that occurred on January 23, 1986. These elections were conducted to fill vacancies in the Parliament of the United Kingdom resulting from the resignation of all Unionist MPs in December 1985.