54°30′22″N 6°02′38″W / 54.506°N 6.044°W / 54.506; -6.044

Lagan Valley
Former County constituency for the Parliament of Northern Ireland
Former constituency
Created	1969
Abolished	1973
Election method	First past the post

(1921–72)
Politics of Northern Ireland
Government Governor Privy Council Ministries Prime Minister Craigavon ministry Andrews ministry Brookeborough ministry O'Neill ministry Chichester-Clark ministry Faulkner ministry Northern Ireland Civil Service Departments
Parliament Acts Statutory rules and orders Senate Speaker of the Senate Leader of the Senate House of Commons Speaker Leader of the Opposition Members 1921, 1925, 1929, 1933 1938, 1945, 1949, 1953 1958, 1962, 1965, 1969 Senate
Elections Elections in Northern Ireland 1921, 1925, 1929, 1933 1938, 1945, 1949, 1953 1958, 1962, 1965, 1969 By-elections Constituencies Political parties
See also Fourth Home Rule Bill Constitution Act 1973
Other countries
v t e

Lagan Valley was a single-member county constituency of the Parliament of Northern Ireland.

Before 1969, the area formed part of the Northern Ireland Parliament constituencies of Mid Down and Iveagh.

Lagan Valley was created by the Electoral Law Act (Northern Ireland) 1968 as a division of County Down. It was located to the south of Belfast. The seat included Hillsborough, Drumbo and Carryduff as well as the sprawling rural area of Ballymacbrennan, which are split between the Lagan Valley and South Belfast and Mid Down constituencies.

The constituency sent one MP to the House of Commons of Northern Ireland at the 1969 Northern Ireland general election. The Parliament was prorogued on 30 March 1972, under the terms of the Northern Ireland (Temporary Provisions) Act 1972. It was formally abolished in 1973 when the Northern Ireland Constitution Act 1973 received Royal Assent on 18 July 1973.

The Parliamentary representative of the division was elected using the first-past-the-post system.

Year	Member	Party
1969	Robert Porter		UUP
1972			Alliance

Porter joined the Alliance Party in June 1972, the Parliament having been suspended in March. As a result, he never sat as an Alliance member in the Northern Ireland House of Commons.

General Election 24 February 1969: Lagan Valley

Party		Candidate	Votes	%	±%
	UUP	Robert Porter	Unopposed	N/A	N/A
	UUP gain from new seat		Swing	N/A

• Parliament prorogued 30 March 1972 and abolished 18 July 1973

• Northern Ireland Parliamentary Election Results 1921-1972, compiled and edited by Sydney Elliott (Political Reference Publications 1973)
• Northern Ireland House of Commons, 1921 - 1972

• For more information about the Northern Ireland House of Commons, see http://www.election.demon.co.uk/stormont/stormont.html Archived 2006-02-11 at the Wayback Machine