Date
|
Constituency
|
Incumbent
|
Winner
|
Cause
|
2 May 1923
|
Belfast West
|
William Twaddell
|
|
UUP
|
Philip James Woods
|
|
Ind. Unionist
|
Death
|
6 November 1925
|
Belfast South
|
Philip James Woods
|
|
UUP
|
Anthony Babington
|
|
UUP
|
Declined seat in favour of Belfast West
|
25 November 1925
|
Armagh
|
Richard Best
|
|
UUP
|
John Clarke Davison
|
|
UUP
|
Appointed Lord Justice of Appeal
|
10 November 1930
|
North Tyrone
|
William Thomas Miller
|
|
UUP
|
James Fulton Gamble
|
|
UUP
|
Death
|
4 June 1934
|
Belfast Central
|
Joseph Devlin
|
|
Nationalist
|
Thomas Joseph Campbell
|
|
Nationalist
|
Death
|
22 March 1935
|
Queen's University of Belfast
|
Robert McNeill
|
|
Ind. Unionist
|
Arthur Brownlow Mitchell
|
|
UUP
|
Resignation
|
2 April 1937
|
Belfast Ballynafeigh
|
Thomas Moles
|
|
UUP
|
Frederick Thompson
|
|
UUP
|
Death
|
7 May 1937
|
Foyle
|
James Joseph McCarroll
|
|
Nationalist
|
Patrick Maxwell
|
|
Nationalist
|
Death
|
27 May 1937
|
Larne
|
George Boyle Hanna
|
|
UUP
|
Harold Claude Robinson
|
|
UUP
|
Resignation
|
29 September 1938
|
Mid Armagh
|
John Clarke Davison
|
|
UUP
|
Norman Stronge
|
|
UUP
|
Resignation
|
5 December 1938
|
Queen's University of Belfast
|
Robert James Johnstone
|
|
UUP
|
Howard Stevenson
|
|
UUP
|
Death
|
27 April 1939
|
City of Londonderry
|
Edward Sullivan Murphy
|
|
UUP
|
William Lowry
|
|
UUP
|
Death
|
10 November 1939
|
Bannside
|
George Charles Gillespie Young
|
|
UUP
|
Malcolm Patrick
|
|
UUP
|
Death
|
15 March 1941
|
Central Armagh
|
David Shillington
|
|
UUP
|
George Dougan
|
|
UUP
|
Death
|
27 March 1941
|
North Down
|
James Craig
|
|
UUP
|
Thomas Bailie
|
|
Ind. Unionist
|
Death
|
2 July 1941
|
Mid Tyrone
|
Hugh McAleer
|
|
Nationalist
|
Michael McGurk
|
|
Independent Nationalist
|
Death
|
3 December 1941
|
Belfast Willowfield
|
Arthur Black
|
|
UUP
|
Harry Midgley
|
|
NI Labour
|
Resignation
|
2 April 1942
|
Belfast Falls
|
Richard Byrne
|
|
Nationalist
|
Eamon Donnelly
|
|
Ind. Republican
|
Death
|
19 October 1942
|
Queen's University of Belfast
|
Arthur Brownlow Mitchell
|
|
UUP
|
William Lyle
|
|
UUP
|
Death
|
2 July 1943
|
Queen's University of Belfast
|
Robert Corkey
|
|
UUP
|
John W. Renshaw
|
|
UUP
|
Resignation
|
11 August 1943
|
North Tyrone
|
James Gamble
|
|
UUP
|
Thomas Lyons
|
|
UUP
|
Death
|
26 August 1943
|
Carrick
|
John Fawcett Gordon
|
|
UUP
|
John Dermot Campbell
|
|
UUP
|
Resignation
|
13 December 1944
|
Queen's University of Belfast
|
John MacDermott
|
|
UUP
|
Herbert Quin
|
|
UUP
|
Appointed High Court Judge
|
12 April 1945
|
South Tyrone
|
Rowley Elliott
|
|
UUP
|
W. F. McCoy
|
|
UUP
|
Death
|
19 April 1945
|
Carrick
|
John Dermot Campbell
|
|
UUP
|
Lancelot Curran
|
|
UUP
|
Death
|
19 April 1945
|
Larne
|
Harold Claude Robinson
|
|
UUP
|
Walter Topping
|
|
UUP
|
Death
|
15 October 1945
|
North Antrim
|
Robert Lynn
|
|
UUP
|
William McCleery
|
|
UUP
|
Death
|
22 August 1946
|
Belfast Central
|
Thomas Joseph Campbell
|
|
Nationalist
|
Frank Hanna
|
|
NI Labour
|
Resignation
|
7 November 1946
|
Bannside
|
Malcolm Patrick
|
|
UUP
|
Terence O'Neill
|
|
UUP
|
Death
|
27 June 1947
|
City of Londonderry
|
William Lowry
|
|
UUP
|
James Godfrey MacManaway
|
|
UUP
|
Resignation
|
20 April 1948
|
Queen's University, Belfast
|
Frederick McSorley
|
|
Independent
|
Samuel Irwin
|
|
UUP
|
Death
|
16 August 1948
|
Mid Tyrone
|
Michael McGurk
|
|
Nationalist
|
Edward McCullagh
|
|
Nationalist
|
Death
|
24 October 1949
|
Enniskillen
|
Erne Ferguson
|
|
UUP
|
Thomas Charles Nelson
|
|
UUP
|
Resignation
|
15 November 1949
|
Queen's University, Belfast
|
William Lyle
|
|
UUP
|
Frederick Lloyd-Dodd
|
|
UUP
|
Death
|
29 November 1949
|
Belfast Duncairn
|
William Grant
|
|
UUP
|
George Boyle Hanna
|
|
UUP
|
Death
|
20 January 1950
|
Carrick
|
Lancelot Curran
|
|
UUP
|
Alexander Hunter
|
|
UUP
|
Resignation
|
4 April 1950
|
Belfast Woodvale
|
John William Nixon
|
|
Ind. Unionist
|
Robert Harcourt
|
|
UUP
|
Death
|
31 October 1950
|
Belfast Bloomfield
|
Herbert Dixon
|
|
UUP
|
Daniel Dixon
|
|
UUP
|
Death
|
6 December 1950
|
South Armagh
|
Malachy Conlon
|
|
Nationalist
|
Charles McGleenan
|
|
Anti-Partition
|
Death
|
2 February 1951
|
Antrim Borough
|
Hugh Minford
|
|
UUP
|
Nat Minford
|
|
UUP
|
Death
|
18 June 1951
|
City of Londonderry
|
James Godfrey MacManaway
|
|
UUP
|
Edward Warburton Jones
|
|
UUP
|
Resignation
|
10 December 1951
|
South Antrim
|
John Milne Barbour
|
|
UUP
|
Brian McConnell
|
|
UUP
|
Death
|
8 May 1954
|
Enniskillen
|
Thomas Charles Nelson
|
|
UUP
|
Harry West
|
|
UUP
|
Death
|
15 October 1955
|
Central Armagh
|
George Dougan
|
|
UUP
|
Isaac Hawthorne
|
|
UUP
|
Death
|
15 November 1955
|
Belfast Woodvale
|
Robert Harcourt
|
|
UUP
|
Neville Martin
|
|
UUP
|
Elected Lord Mayor of Belfast
|
23 November 1956
|
Belfast Windsor
|
Archibald Wilson
|
|
UUP
|
Herbert Kirk
|
|
UUP
|
Resignation
|
4 December 1956
|
Belfast Duncairn
|
George Boyle Hanna
|
|
UUP
|
William Fitzsimmons
|
|
UUP
|
Resignation
|
5 March 1959
|
West Down
|
John Edgar Bailey
|
|
UUP
|
David John Little
|
|
UUP
|
Death
|
28 May 1959
|
Belfast Clifton
|
Robin Kinahan
|
|
UUP
|
William James Morgan
|
|
UUP
|
Elected Lord Mayor of Belfast
|
5 February 1960
|
Larne
|
Walter Topping
|
|
UUP
|
William Craig
|
|
UUP
|
Resignation
|
16 February 1960
|
Belfast Shankill
|
Henry Holmes
|
|
UUP
|
Desmond Boal
|
|
UUP
|
Resignation
|
9 July 1960
|
South Londonderry
|
Dehra Parker
|
|
UUP
|
James Chichester-Clark
|
|
UUP
|
Resignation
|
29 November 1960
|
North Londonderry
|
Robert Moore
|
|
UUP
|
Joseph Burns
|
|
UUP
|
Death
|
20 April 1961
|
Belfast Bloomfield
|
Daniel Dixon
|
|
UUP
|
Walter Scott
|
|
UUP
|
Resignation
|
22 November 1961
|
Queen's University, Belfast
|
Samuel Irwin
|
|
UUP
|
Sheelagh Murnaghan
|
|
Ulster Liberal
|
Death
|
6 December 1962
|
Belfast Cromac
|
Joseph Morgan
|
|
UUP
|
William Kennedy
|
|
UUP
|
Death
|
9 May 1964
|
Iveagh
|
Brian Maginess
|
|
UUP
|
Samuel Magowan
|
|
UUP
|
Appointed County Court Judge
|
30 June 1964
|
East Tyrone
|
Joseph Francis Stewart
|
|
Nationalist
|
Austin Currie
|
|
Nationalist
|
Death
|
3 December 1964
|
Mid Down
|
John L. O. Andrews
|
|
UUP
|
Basil Kelly
|
|
UUP
|
Elected to Senate
|
19 June 1965
|
West Down
|
David John Little
|
|
UUP
|
John Dobson
|
|
UUP
|
Appointed Recorder of Londonderry
|
23 November 1966
|
Queen's University, Belfast
|
Charles Stewart
|
|
Independent
|
Robert Porter
|
|
UUP
|
Resignation
|
25 May 1967
|
South Down
|
Joseph Connellan
|
|
Nationalist
|
Michael Keogh
|
|
Nationalist
|
Death
|
22 March 1968
|
Lisnaskea
|
Basil Brooke
|
|
UUP
|
John Brooke
|
|
UUP
|
Resignation
|
16 May 1968
|
City of Londonderry
|
Edward Warburton Jones
|
|
UUP
|
Albert Anderson
|
|
UUP
|
Appointed High Court Judge
|
6 November 1968
|
South Antrim
|
Brian McConnell
|
|
UUP
|
Richard Ferguson
|
|
UUP
|
Resignation
|
16 April 1970
|
Bannside
|
Terence O'Neill
|
|
UUP
|
Ian Paisley
|
|
Protestant Unionist
|
Resignation
|
16 April 1970
|
South Antrim
|
Richard Ferguson
|
|
UUP
|
William Beattie
|
|
Protestant Unionist
|
Resignation
|
12 November 1970
|
Belfast St Anne's
|
Norman Laird
|
|
UUP
|
John Laird
|
|
UUP
|
Death
|