List of United Kingdom by-elections (1931–1950)

This is a list of parliamentary by-elections in the United Kingdom held between 1931 and 1950, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighted: red for a Labour gain, blue for a Conservative gain, orange for a Liberal gain, yellow for an SNP gain and grey for any other gain. A grand total of 333 by-elections were held during this period.

Resignations
Where the cause of by-election is given as "resignation" or "seeks re-election", this indicates that the incumbent was appointed on his or her own request to an "office of profit under the Crown", either the Steward of the Chiltern Hundreds or the Steward of the Manor of Northstead. These appointments are made as a constitutional device for leaving the House of Commons, whose Members are not permitted to resign.

By-elections
{| class="wikitable"
 * colspan=9|

1945–1950 Parliament
!By-election !! Date !! Incumbent !! colspan=2 | Party !! Winner !! colspan=2 | Party !! Cause
 * Bradford South
 * 8 December 1949
 * Meredith Titterington
 * George Craddock
 * Death
 * Leeds West
 * 21 July 1949
 * Thomas Stamford
 * Charles Pannell
 * Death (suicide)
 * Sowerby
 * 16 March 1949
 * John Belcher
 * Douglas Houghton
 * Resignation (scandal)
 * St Pancras North
 * 10 March 1949
 * George House
 * Kenneth Robinson
 * Death
 * Hammersmith South
 * 24 February 1949
 * William Thomas Adams
 * Thomas Williams
 * Death
 * Batley and Morley
 * 17 February 1949
 * Hubert Beaumont
 * Alfred Broughton
 * Death
 * Glasgow Hillhead
 * 25 November 1948
 * James Reid
 * Thomas Galbraith
 * Law life peerage on appointment as Lord of Appeal in Ordinary
 * Edmonton
 * 13 November 1948
 * Evan Durbin
 * Austen Albu
 * Death (drowned in swimming accident)
 * Stirling and Falkirk
 * 7 October 1948
 * Joseph Westwood
 * Malcolm Macpherson
 * Death (road accident)
 * Glasgow Gorbals
 * 30 September 1948
 * George Buchanan
 * Alice Cullen
 * Chairman of National Assistance Board
 * Southwark Central
 * 29 April 1948
 * John Hanbury Martin
 * Roy Jenkins
 * Resignation
 * Brigg
 * 24 March 1948
 * Thomas Williamson
 * Lance Mallalieu
 * Resignation
 * Croydon North
 * 11 March 1948
 * Henry Willink
 * Fred Harris
 * Master of Magdalene College, Cambridge
 * Armagh
 * 5 March 1948
 * Sir William Allen
 * James Harden
 * Death (road accident)
 * Wigan
 * 4 March 1948
 * William Foster
 * Ronald Williams
 * Death
 * Paisley
 * 18 February 1948
 * Viscount Corvedale
 * Douglas Johnston
 * Succession to the peerage
 * - bgcolor=lightblue
 * Glasgow Camlachie
 * 28 January 1948
 * Campbell Stephen
 * /Labour Party
 * Charles McFarlane
 * Death
 * Epsom
 * 4 December 1947
 * Sir Archibald Southby, Bt
 * Malcolm McCorquodale
 * Resignation
 * Howdenshire
 * 27 November 1947
 * Clifford Glossop
 * George Odey
 * Resignation
 * Edinburgh East
 * 27 November 1947
 * George Thomson
 * John Wheatley
 * Appointment as Lord Justice Clerk
 * Gravesend
 * 26 November 1947
 * Garry Allighan
 * Sir Richard Acland
 * Expelled from the House (found to be in extreme contempt)
 * Islington West
 * 25 September 1947
 * Frederick Montague
 * Albert Evans
 * Appointment to hereditary peerage
 * Liverpool Edge Hill
 * 11 September 1947
 * Richard Clitherow
 * Arthur Irvine
 * Death (overdose)
 * Jarrow
 * 7 May 1947
 * Ellen Wilkinson
 * Ernest Fernyhough
 * Death (overdose)
 * Normanton
 * 11 February 1947
 * Tom Smith
 * George Sylvester
 * Labour Director of North East Coal Board
 * Kilmarnock
 * 5 December 1946
 * Clarice Shaw
 * William Ross
 * Resignation due to ill health
 * Aberdare
 * 5 December 1946
 * George Hall
 * David Thomas
 * Elevation to hereditary peerage
 * - bgcolor=lightblue
 * Combined Scottish Universities
 * 27 November 1946
 * Sir John Boyd-Orr
 * Walter Elliot
 * Appointment as Chancellor of the University of Glasgow
 * Aberdeen South
 * 26 November 1946
 * Sir Douglas Thomson
 * Lady Tweedsmuir
 * Resignation
 * Paddington North
 * 20 November 1946
 * Sir Noel Mason-Macfarlane
 * William J. Field
 * Resignation
 * Rotherhithe
 * 19 November 1946
 * Sir Benjamin Smith
 * Robert Mellish
 * Chairman of West Midlands Coal Board
 * Glasgow Bridgeton
 * 29 August 1946
 * James Maxton
 * James Carmichael
 * Death
 * Battersea North
 * 25 July 1946
 * Francis Douglas
 * Douglas Jay
 * Governor of Malta
 * Pontypool
 * 23 July 1946
 * Arthur Jenkins
 * Daniel West
 * Death
 * Bexley
 * 22 July 1946
 * Jennie Adamson
 * Ashley Bramall
 * Deputy Chairman of Assistance Board
 * - bgcolor=lightblue
 * Down
 * 6 June 1946
 * James Little
 * C. H. Mullan
 * Death
 * Ogmore
 * 4 June 1946
 * Edward Williams
 * John Evans
 * Australian High Commissioner
 * - bgcolor=lightblue
 * Combined English Universities
 * 18 March 1946
 * Eleanor Rathbone
 * Henry Strauss
 * Death
 * Hemsworth
 * 22 February 1946
 * George Griffiths
 * Horace Holmes
 * Death
 * Heywood and Radcliffe
 * 21 February 1946
 * John Edmondson Whittaker
 * Anthony Greenwood
 * Death (suicide)
 * Glasgow Cathcart
 * 12 February 1946
 * Francis Beattie
 * John Henderson
 * Death (road accident)
 * South Ayrshire
 * 7 February 1946
 * Alexander Sloan
 * Emrys Hughes
 * Death
 * Preston
 * 31 January 1946
 * John Sunderland
 * Edward Shackleton
 * Death
 * Tottenham North
 * 13 December 1945
 * Robert Morrison
 * William Irving
 * Elevation to hereditary peerage
 * Kensington South
 * 20 November 1945
 * Sir William Davison
 * Richard Law
 * Elevation to hereditary peerage
 * Bournemouth
 * 15 November 1945
 * Sir Leonard Lyle
 * Brendan Bracken
 * Elevation to hereditary peerage
 * Bromley
 * 14 November 1945
 * Edward Campbell
 * Harold Macmillan
 * Death
 * City of London
 * 31 October 1945
 * George Broadbridge
 * Ralph Assheton
 * Elevation to hereditary peerage
 * Monmouth
 * 31 October 1945
 * Leslie Pym
 * Peter Thorneycroft
 * Death
 * Edinburgh East
 * 3 October 1945
 * Frederick Pethick-Lawrence
 * George Thomson
 * Elevation to hereditary peerage
 * Ashton-under-Lyne
 * 2 October 1945
 * Sir William Jowitt
 * Hervey Rhodes
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * Smethwick
 * 1 October 1945
 * Alfred Dobbs
 * Patrick Gordon Walker
 * Death (road accident)
 * colspan=9|
 * 23 July 1946
 * Arthur Jenkins
 * Daniel West
 * Death
 * Bexley
 * 22 July 1946
 * Jennie Adamson
 * Ashley Bramall
 * Deputy Chairman of Assistance Board
 * - bgcolor=lightblue
 * Down
 * 6 June 1946
 * James Little
 * C. H. Mullan
 * Death
 * Ogmore
 * 4 June 1946
 * Edward Williams
 * John Evans
 * Australian High Commissioner
 * - bgcolor=lightblue
 * Combined English Universities
 * 18 March 1946
 * Eleanor Rathbone
 * Henry Strauss
 * Death
 * Hemsworth
 * 22 February 1946
 * George Griffiths
 * Horace Holmes
 * Death
 * Heywood and Radcliffe
 * 21 February 1946
 * John Edmondson Whittaker
 * Anthony Greenwood
 * Death (suicide)
 * Glasgow Cathcart
 * 12 February 1946
 * Francis Beattie
 * John Henderson
 * Death (road accident)
 * South Ayrshire
 * 7 February 1946
 * Alexander Sloan
 * Emrys Hughes
 * Death
 * Preston
 * 31 January 1946
 * John Sunderland
 * Edward Shackleton
 * Death
 * Tottenham North
 * 13 December 1945
 * Robert Morrison
 * William Irving
 * Elevation to hereditary peerage
 * Kensington South
 * 20 November 1945
 * Sir William Davison
 * Richard Law
 * Elevation to hereditary peerage
 * Bournemouth
 * 15 November 1945
 * Sir Leonard Lyle
 * Brendan Bracken
 * Elevation to hereditary peerage
 * Bromley
 * 14 November 1945
 * Edward Campbell
 * Harold Macmillan
 * Death
 * City of London
 * 31 October 1945
 * George Broadbridge
 * Ralph Assheton
 * Elevation to hereditary peerage
 * Monmouth
 * 31 October 1945
 * Leslie Pym
 * Peter Thorneycroft
 * Death
 * Edinburgh East
 * 3 October 1945
 * Frederick Pethick-Lawrence
 * George Thomson
 * Elevation to hereditary peerage
 * Ashton-under-Lyne
 * 2 October 1945
 * Sir William Jowitt
 * Hervey Rhodes
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * Smethwick
 * 1 October 1945
 * Alfred Dobbs
 * Patrick Gordon Walker
 * Death (road accident)
 * colspan=9|
 * Sir Leonard Lyle
 * Brendan Bracken
 * Elevation to hereditary peerage
 * Bromley
 * 14 November 1945
 * Edward Campbell
 * Harold Macmillan
 * Death
 * City of London
 * 31 October 1945
 * George Broadbridge
 * Ralph Assheton
 * Elevation to hereditary peerage
 * Monmouth
 * 31 October 1945
 * Leslie Pym
 * Peter Thorneycroft
 * Death
 * Edinburgh East
 * 3 October 1945
 * Frederick Pethick-Lawrence
 * George Thomson
 * Elevation to hereditary peerage
 * Ashton-under-Lyne
 * 2 October 1945
 * Sir William Jowitt
 * Hervey Rhodes
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * Smethwick
 * 1 October 1945
 * Alfred Dobbs
 * Patrick Gordon Walker
 * Death (road accident)
 * colspan=9|
 * George Thomson
 * Elevation to hereditary peerage
 * Ashton-under-Lyne
 * 2 October 1945
 * Sir William Jowitt
 * Hervey Rhodes
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * Smethwick
 * 1 October 1945
 * Alfred Dobbs
 * Patrick Gordon Walker
 * Death (road accident)
 * colspan=9|
 * 1 October 1945
 * Alfred Dobbs
 * Patrick Gordon Walker
 * Death (road accident)
 * colspan=9|
 * Death (road accident)
 * colspan=9|
 * colspan=9|

1935–1945 Parliament
This Parliament's life was extended by annual Prolongation of Parliament Acts for the duration of the Second World War. By-elections continued to fill vacancies. An electoral truce was negotiated between the Conservative, Labour, Liberal, National Liberal and National Labour parties, and National independent MPs that they would not contest by-elections which another party held (although there were a few occasions when a National party would step aside from a vacancy in favour of a National independent, usually a government minister). However many independents stood, including some party members who disagreed with the truce. The Common Wealth Party was formed in part with a view to contesting wartime by-elections. A total of 219 by-elections were held during this period. !By-election !! Date !! Incumbent !! colspan=2 | Party !! Winner !! colspan=2 | Party !! Cause
 * Newport
 * 17 May 1945
 * Reginald Clarry
 * Ronald Bell
 * Death
 * Neath
 * 15 May 1945
 * William Jenkins
 * D. J. Williams
 * Death
 * Middlesbrough West
 * 14 May 1945
 * Harcourt Johnstone
 * Don Bennett
 * Death
 * Caernarvon Boroughs
 * 26 April 1945
 * David Lloyd George
 * Seaborne Davies
 * Elevation to the peerage
 * - bgcolor="#c0c0c0"
 * Chelmsford
 * 26 April 1945
 * John Macnamara
 * Ernest Millington
 * Death (active service)
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 13 April 1945
 * George Morrison
 * John Boyd-Orr
 * Resignation
 * - bgcolor=FFFF66
 * Motherwell
 * 12 April 1945
 * James Walker
 * Robert McIntyre
 * Death (road accident)
 * Berwick-upon-Tweed
 * 17 October 1944
 * George Charles Grey
 * William Beveridge
 * Death (active service)
 * Chelsea
 * 11 October 1944
 * Samuel Hoare
 * William Sidney
 * Elevation to the peerage
 * Bilston
 * 20 September 1944
 * Ian Hannah
 * William Gibbons
 * Death
 * Manchester Rusholme
 * 8 July 1944
 * Edmund Radford
 * Frederick Cundiff
 * Death
 * Clay Cross
 * 14 April 1944
 * George Ridley
 * Harold Neal
 * Death
 * Camberwell North
 * 30 March 1944
 * Charles Ammon
 * Cecil Manning
 * Elevation to the peerage
 * Bury St Edmunds
 * 29 February 1944
 * Frank Heilgers
 * Edgar Keatinge
 * Death (train crash)
 * Sheffield Attercliffe
 * 21 February 1944
 * Cecil Wilson
 * John Hynd
 * Resignation (ill health)
 * Kirkcaldy Burghs
 * 17 February 1944
 * Thomas Kennedy
 * Thomas Hubbard
 * Resignation (ill-health)
 * - bgcolor="#c0c0c0"
 * West Derbyshire
 * 17 February 1944
 * Henry Hunloke
 * Charles Frederick White
 * Resignation
 * Brighton
 * 3 February 1944
 * Sir Cooper Rawson
 * William Teeling
 * Resignation (ill-health)
 * - bgcolor="#c0c0c0"
 * Skipton
 * 7 January 1944
 * George William Rickards
 * Hugh Lawson
 * Death
 * Acton
 * 14 December 1943
 * Hubert Duggan
 * Henry Longhurst
 * Death (active service)
 * Darwen
 * 15 December 1943
 * Stuart Russell
 * Stanley Prescott
 * Death (active service)
 * Consett
 * 15 November 1943
 * David Adams
 * James Glanville
 * Death
 * Woolwich West
 * 10 November 1943
 * Kingsley Wood
 * Francis Beech
 * Death
 * Peterborough
 * 15 October 1943
 * David Cecil
 * John Hely-Hutchinson
 * Appointment as Governor of Bermuda
 * St Albans
 * 5 October 1943
 * Francis Fremantle
 * John Grimston
 * Death
 * Chippenham
 * 24 August 1943
 * Victor Cazalet
 * David Eccles
 * Death (active service)
 * Burton-on-Trent
 * 2 July 1943
 * John Gretton
 * John Gretton
 * Resignation (ill-health)
 * Birmingham Aston
 * 9 June 1943
 * Edward Kellett
 * Redvers Prior
 * Death (active service)
 * Newark
 * 8 June 1943
 * William Cavendish-Bentinck
 * Sidney Shephard
 * Succession to the peerage
 * The Hartlepools
 * 1 June 1943
 * William George Howard Gritten
 * Thomas George Greenwell
 * Death
 * - bgcolor=lightblue
 * Daventry
 * 20 April 1943
 * Edward Fitzroy
 * Reginald Manningham-Buller
 * Death
 * - bgcolor="#c0c0c0"
 * Eddisbury
 * 7 April 1943
 * Richard John Russell
 * John Loverseed
 * Death
 * Buckingham
 * 4 April 1943
 * John Whiteley
 * Lionel Berry
 * Death (active service)
 * Watford
 * 23 February 1943
 * Dennis Herbert
 * William Helmore
 * Elevation to the peerage
 * Bristol Central
 * 18 February 1943
 * Allen Apsley
 * Violet Bathurst
 * Death (active service)
 * Portsmouth North
 * 16 February 1943
 * Sir Roger Keyes
 * William James
 * Elevation to the peerage
 * King's Lynn
 * 12 February 1943
 * Somerset Maxwell
 * Edmund Roche
 * Death (active service)
 * Midlothian and Peebles Northern
 * 11 February 1943
 * John Colville
 * Sir David King Murray
 * Appointment as Governor of Bombay
 * Antrim
 * 11 February 1943
 * Joseph McConnell
 * John Dermot Campbell
 * Death
 * Ashford
 * 10 February 1943
 * Patrick Spens
 * Edward Percy Smith
 * Appointment as Chief Justice of India
 * - bgcolor="#c0c0c0"
 * Belfast West
 * 9 February 1943
 * Alexander Browne
 * Jack Beattie
 * Death
 * University of Wales
 * 30 January 1943
 * Ernest Evans
 * William John Gruffydd
 * Appointment as a County Court Judge
 * Hamilton
 * 29 January 1943
 * Duncan Graham
 * Tom Fraser
 * Death
 * Ince
 * 20 October 1942
 * Gordon Macdonald
 * Tom Brown
 * Appointment as North-West Regional Fuel Controller
 * Manchester Clayton
 * 17 October 1942
 * John Jagger
 * Harry Thorneycroft
 * Death (road accident)
 * Sheffield Park
 * 27 August 1942
 * George Lathan
 * Thomas Burden
 * Death
 * Poplar South
 * 12 August 1942
 * David Morgan Adams
 * William Henry Guy
 * Death
 * Whitechapel and St Georges
 * 8 August 1942
 * J. H. Hall
 * Walter Edwards
 * Death
 * Rothwell
 * 7 August 1942
 * William Lunn
 * T. J. Brooks
 * Death
 * Spennymoor
 * 21 July 1942
 * Joseph Batey
 * James Murray
 * Resignation (ill-health)
 * Salisbury
 * 8 July 1942
 * James Despencer-Robertson
 * John Morrison
 * Death
 * Windsor
 * 30 June 1942
 * Annesley Somerville
 * Charles Mott-Radclyffe
 * Death
 * - bgcolor="#c0c0c0"
 * Maldon
 * 25 June 1942
 * Edward Ruggles-Brise
 * Tom Driberg
 * Death
 * Llandaff and Barry
 * 10 June 19421
 * Patrick Munro
 * Cyril Lakin
 * Death (active service)
 * Chichester
 * 25 May 1942
 * John Courtauld
 * Lancelot Joynson-Hicks
 * Death
 * Putney
 * 8 May 1942
 * Marcus Samuel
 * Hugh Linstead
 * Death
 * - bgcolor="#c0c0c0"
 * Rugby
 * 29 April 1942
 * David Margesson
 * William Brown
 * Elevation to the peerage
 * - bgcolor="#c0c0c0"
 * Wallasey
 * 29 April 1942
 * John Moore-Brabazon
 * George Reakes
 * Elevation to the peerage
 * Glasgow Cathcart
 * 29 April 1942
 * John Train
 * Francis Beattie
 * Death
 * - bgcolor="#c0c0c0"
 * Cardiff East
 * 13 April 1942
 * Owen Temple-Morris
 * Sir P. J. Grigg
 * Appointment as a County Court Judge
 * Tavistock
 * 2 April 1942
 * Colin Patrick
 * Henry Studholme
 * Death
 * - bgcolor="#c0c0c0"
 * Grantham
 * 25 March 1942
 * Victor Warrender
 * Denis Kendall
 * Elevation to the peerage
 * Wigan
 * 11 March 1942
 * John Parkinson
 * William Foster
 * Death
 * Newcastle-under-Lyme
 * 11 March 1942
 * Josiah Wedgwood
 * John Mack
 * Elevation to the peerage
 * Manchester Gorton
 * 11 March 1942
 * William Wedgwood Benn
 * William Oldfield
 * Elevation to the peerage
 * Nuneaton
 * 9 March 1942
 * Reginald Fletcher
 * Frank Bowles
 * Elevation to the peerage
 * Keighley
 * 13 February 1942
 * Hastings Lees-Smith
 * Ivor Thomas
 * Death
 * North East Derbyshire
 * 2 February 1942
 * Frank Lee
 * Henry White
 * Death
 * Edinburgh Central
 * 11 December 1941
 * James Guy
 * Frank Watt
 * Resignation (ill-health)
 * Harrow
 * 2 December 1941
 * Isidore Salmon
 * Norman Bower
 * Death
 * Hampstead
 * 27 November 1941
 * George Balfour
 * Charles Challen
 * Death
 * Brighton
 * 15 November 1941
 * Lord Erskine
 * Anthony Marlowe
 * Resignation
 * Lancaster
 * 15 October 1941
 * Herwald Ramsbotham
 * Fitzroy Maclean
 * Elevation to the peerage
 * The Wrekin
 * 26 September 1941
 * James Baldwin-Webb
 * Arthur Colegate
 * Death (drowned when the liner City of Benares was torpedoed)
 * Scarborough and Whitby
 * 24 September 1941
 * Paul Latham
 * Alexander Spearman
 * Resignation (scandal)
 * Berwick-upon-Tweed
 * 18 August 1941
 * Hugh Seely
 * George Charles Grey
 * Elevation to the peerage
 * Pontefract
 * 24 July 1941
 * Adam Hills
 * Percy Barstow
 * Death
 * Dudley
 * 23 July 1941
 * Dudley Joel
 * Cyril Edward Lloyd
 * Death (active service)
 * Edinburgh West
 * 12 July 1941
 * Thomas Cooper
 * Ian Clark Hutchison
 * Appointed Lord Justice Clerk
 * Greenock
 * 10 July 1941
 * Robert Gibson
 * Hector McNeil
 * Appointment as Chairman of the Scottish Land Court
 * West Dorset
 * 21 June 1941
 * Philip Colfox
 * Simon Wingfield-Digby
 * Resignation
 * Hornsey
 * 28 May 1941
 * Euan Wallace
 * David Gammans
 * Death
 * King's Norton
 * 8 May 1941
 * Ronald Cartland
 * Arthur Peto
 * Death (active service)
 * Mansfield
 * 22 April 1941
 * Charles Brown
 * Bernard Taylor
 * Death
 * West Bromwich
 * 16 April 1941
 * Frederick Roberts
 * John Dugdale
 * Resignation (ill-health)
 * Great Yarmouth
 * 8 April 1941
 * Arthur Harbord
 * Percy Jewson
 * Death
 * Carmarthen
 * 26 March 1941
 * Daniel Hopkin
 * Ronw Hughes
 * Appointment as a Metropolitan Police Magistrate
 * Bodmin
 * 11 March 1941
 * John Rathbone
 * Beatrice Wright
 * Death (active service)
 * Hitchin
 * 10 March 1941
 * Arnold Wilson
 * Seymour Berry
 * Death (active service)
 * Dunbartonshire
 * 27 February 1941
 * Thomas Cassells
 * Adam McKinlay
 * Appointment as Sheriff Substitute
 * Petersfield
 * 22 February 1941
 * Reginald Dorman-Smith
 * George Jeffreys
 * Appointment as Governor of Burma
 * South Dorset
 * 22 February 1941
 * Robert Gascoyne-Cecil
 * Victor Montagu
 * Succession to the peerage by writ of acceleration
 * Doncaster
 * 6 February 1941
 * John Morgan
 * Evelyn Walkden
 * Death
 * Birmingham Edgbaston
 * 18 December 1940
 * Neville Chamberlain
 * Peter Bennett
 * Death
 * Northampton
 * 6 December 1940
 * Mervyn Manningham-Buller
 * Gerard Summers
 * Resignation
 * - bgcolor="#c0c0c0"
 * Southampton
 * 27 November 1940
 * Sir John Reith
 * Russell Thomas
 * Elevation to the peerage
 * Aldershot
 * 26 November 1940
 * Roundell Palmer
 * Oliver Lyttelton
 * Succession to the peerage
 * Queen's University of Belfast
 * 2 November 1940
 * Thomas Sinclair
 * Douglas Savory
 * Resignation
 * Preston
 * 25 September 1940
 * Adrian Moreing
 * Randolph Churchill
 * Death
 * Manchester Exchange
 * 21 September 1940
 * Peter Eckersley
 * Thomas Hewlett
 * Death (active service)
 * Bolton
 * 13 September 1940
 * John Haslam
 * Edward Cadogan
 * Death
 * Heywood and Radcliffe
 * 28 August 1940
 * Richard Porritt
 * James Wootton-Davies
 * Death (active service)
 * Mitcham
 * 19 August 1940
 * Richard Meller
 * Malcolm Robertson
 * Death
 * Middlesbrough West
 * 7 August 1940
 * Frank Kingsley Griffith
 * Harcourt Johnstone
 * Appointment as a County Court Judge
 * Wansbeck
 * 29 July 1940
 * Bernard Cruddas
 * Robert Scott
 * Resignation
 * Rochdale
 * 20 July 1940
 * William Kelly
 * Hyacinth Morgan
 * Resignation (ill-health)
 * Nottingham Central
 * 19 July 1940
 * Terence O'Connor
 * Frederick Sykes
 * Death
 * Montrose Burghs
 * 5 July 1940
 * Charles Kerr
 * John Maclay
 * Elevation to the peerage
 * Newcastle upon Tyne West
 * 5 July 1940
 * Joseph Leech
 * William Nunn
 * Elevation to the peerage
 * Bournemouth
 * 27 June 1940
 * Henry Page Croft
 * Leonard Lyle
 * Elevation to the peerage
 * Wandsworth Central
 * 22 June 1940
 * Harry Nathan
 * Ernest Bevin
 * Elevation to the peerage
 * Croydon North
 * 19 June 1940
 * Glyn Mason
 * Henry Willink
 * Resignation
 * Bow and Bromley
 * 12 June 1940
 * George Lansbury
 * Charles Key
 * Death
 * - bgcolor="#c0c0c0"
 * Newcastle upon Tyne North
 * 7 June 1940
 * Nicholas Grattan-Doyle
 * Cuthbert Headlam
 * Resignation (ill-health)
 * Middleton and Prestwich
 * 1 June 1940
 * Nairne Stewart Sandeman
 * Ernest Gates
 * Death
 * Spen Valley
 * 1 June 1940
 * Sir John Simon
 * William Woolley
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * East Renfrewshire
 * 9 May 1940
 * Douglas Douglas-Hamilton
 * Guy Lloyd
 * Succession to the peerage
 * Brighton
 * 9 May 1940
 * George Tryon
 * Lord Erskine
 * Elevation to the peerage
 * Glasgow Pollok
 * 30 April 1940
 * John Gilmour
 * Thomas Galbraith
 * Death
 * Battersea North
 * 17 April 1940
 * William Sanders
 * Francis Douglas
 * Resignation (ill-health)
 * Lonsdale
 * 12 April 1940
 * David Lindsay
 * Ian Fraser
 * Succession to the peerage
 * Argyll
 * 10 April 1940
 * Frederick Macquisten
 * Duncan McCallum
 * Death
 * Leeds North East
 * 13 March 1940
 * John Birchall
 * John Craik-Henderson
 * Resignation (ill-health)
 * City of Chester
 * 7 March 1940
 * Charles Cayzer
 * Basil Nield
 * Apparent murder/suicide
 * Kettering
 * 6 March 1940
 * John Eastwood
 * John Profumo
 * Appointment as a Metropolitan Magistrate
 * - bgcolor="#c0c0c0"
 * Cambridge University
 * 23 February 1940
 * John James Withers
 * Archibald Hill
 * Conservative
 * Death
 * Silvertown
 * 22 February 1940
 * Jack Jones
 * James Hollins
 * Resignation (ill-health)
 * Southwark Central
 * 10 February 1940
 * Harry Day
 * John Hanbury Martin
 * Death
 * Belfast East
 * 8 February 1940
 * Herbert Dixon
 * Henry Peirson Harland
 * Elevation to the peerage
 * Swansea East
 * 5 February 1940
 * David Williams
 * David Mort
 * Resignation (ill-health)
 * - bgcolor="#c0c0c0"
 * City of London
 * 5 February 1940
 * Alan Anderson
 * Sir Andrew Duncan
 * Resignation (pressure of work at the Wheat Commission)
 * - bgcolor="#c0c0c0"
 * Southampton
 * 1 February 1940
 * Sir C. C. Barrie
 * Sir John Reith
 * Resignation (to provide a seat for Sir John Reith)
 * Wells
 * 13 December 1939
 * A. J. Muirhead
 * D. C. Boles
 * Death (suicide)
 * Stretford
 * 8 December 1939
 * Anthony Crossley
 * Ralph Etherton
 * Death (air crash)
 * Streatham
 * 7 December 1939
 * William Lane-Mitchell
 * David Robertson
 * Resignation (to make way for a younger candidate)
 * Macclesfield
 * 22 November 1939
 * John Remer
 * W. Garfield Weston
 * Resignation (ill-health)
 * Ashton-under-Lyne
 * 28 October 1939
 * Fred Simpson
 * William Jowitt
 * Death
 * Ormskirk
 * 27 October 1939
 * Samuel Rosbotham
 * Stephen King-Hall
 * Resignation (ill-health)
 * Clackmannanshire and East Stirlingshire
 * 13 October 1939
 * Lauchlin MacNeill Weir
 * Arthur Woodburn
 * Death
 * High Peak
 * 7 October 1939
 * Alfred Law
 * High Molson
 * Death
 * Fareham
 * 6 October 1939
 * Sir Thomas Inskip
 * Dymoke White
 * Hereditary Peerage on appointment as Lord High Chancellor of Great Britain
 * - bgcolor=pink
 * Brecon and Radnorshire
 * 1 August 1939
 * Ivor Guest
 * William Jackson
 * Succession to the peerage
 * Colne Valley
 * 27 July 1939
 * Ernest Marklew
 * Glenvil Hall
 * Death
 * Monmouth
 * 25 July 1939
 * John Herbert
 * Leslie Pym
 * Appointment as Governor of Bengal
 * Hythe
 * 20 July 1939
 * Philip Sassoon
 * Rupert Brabner
 * Death
 * North Cornwall
 * 13 July 1939
 * Francis Dyke Acland
 * Tom Horabin
 * Death
 * Portsmouth South
 * 12 July 1939
 * Herbert Cayzer
 * Jocelyn Lucas
 * Elevation to the peerage
 * Caerphilly
 * 4 July 1939
 * Morgan Jones
 * Ness Edwards
 * Death
 * - bgcolor=pink
 * Kennington
 * 24 May 1939
 * George Harvey
 * John Wilmot
 * Death
 * Birmingham Aston
 * 17 May 1939
 * Arthur Hope
 * Edward Kellett
 * Resignation
 * - bgcolor=pink
 * Southwark North
 * 19 May 1939
 * Edward Strauss
 * George Isaacs
 * Death
 * Westminster Abbey
 * 17 May 1939
 * Sidney Herbert
 * Harold Webbe
 * Death
 * Sheffield Hallam
 * 10 May 1939
 * Louis Smith
 * Roland Jennings
 * Death
 * Down
 * 10 May 1939
 * David Reid
 * James Little
 * Death
 * South Ayrshire
 * 20 April 1939
 * James Brown
 * Alexander Sloan
 * Death
 * Kincardineshire and West Aberdeenshire
 * 30 March 1939
 * Malcolm Barclay-Harvey
 * Colin Thornton-Kemsley
 * Resignation
 * Batley and Morley
 * 9 March 1939
 * Willie Brooke
 * Hubert Beaumont
 * Death
 * Ripon
 * 23 February 1939
 * John Waller Hills
 * Christopher York
 * Death
 * Holderness
 * 15 February 1939
 * Samuel Savery
 * Gurney Braithwaite
 * Death
 * East Norfolk
 * 26 January 1939
 * William Lygon
 * Frank Medlicott
 * Succession to the peerage
 * Kinross and Western Perthshire
 * 21 December 1938
 * The Duchess of Atholl
 * /Ind Conservative
 * William McNair Snadden
 * Sought re-election in opposition to government foreign policy
 * Fylde
 * 30 November 1938
 * Edward Stanley
 * Claude Lancaster
 * Death
 * Lewisham West
 * 24 November 1938
 * Philip Dawson
 * Henry Brooke
 * Death
 * Doncaster
 * 17 November 1938
 * Alfred Short
 * John Morgan
 * Death
 * - bgcolor="#c0c0c0"
 * Bridgwater
 * 17 November 1938
 * Reginald Croom-Johnson
 * Vernon Bartlett
 * Appointment as High Court Judge
 * Walsall
 * 16 November 1938
 * Joseph Leckie
 * George Schuster
 * Death
 * - bgcolor=pink
 * Dartford
 * 7 November 1938
 * Frank Edward Clarke
 * Jennie Adamson
 * Death
 * Oxford
 * 27 October 1938
 * Robert Bourne
 * Quintin Hogg
 * Death
 * Willesden East
 * 28 July 1938
 * Daniel Somerville
 * Samuel Hammersley
 * Death
 * Barnsley
 * 16 June 1938
 * John Potts
 * Frank Collindridge
 * Death
 * Stafford
 * 9 June 1938
 * William Ormsby-Gore
 * Peter Thorneycroft
 * Succession to the peerage
 * West Derbyshire
 * 2 June 1938
 * Edward Cavendish
 * Henry Hunloke
 * Succession to the peerage
 * Aylesbury
 * 19 May 1938
 * Michael Beaumont
 * Stanley Reed
 * Resignation
 * - bgcolor=pink
 * Lichfield
 * 5 May 1938
 * James Lovat-Fraser
 * Cecil Poole
 * Death
 * - bgcolor=pink
 * Fulham West
 * 6 April 1938
 * Cyril Cobb
 * Edith Summerskill
 * Death
 * City of London
 * 6 April 1938
 * Vansittart Bowater
 * George Broadbridge
 * Death
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 25 February 1938
 * Ramsay MacDonald
 * Sir John Anderson
 * Death
 * - bgcolor=pink
 * Ipswich
 * 16 February 1938
 * John Ganzoni
 * Richard Stokes
 * Elevation to the peerage
 * Pontypridd
 * 11 February 1938
 * David Lewis Davies
 * Arthur Pearson
 * Death
 * Farnworth
 * 27 January 1938
 * Guy Rowson
 * George Tomlinson
 * Death
 * Hastings
 * 24 November 1937
 * Eustace Percy
 * Maurice Hely-Hutchinson
 * Resignation
 * - bgcolor=pink
 * Islington North
 * 13 October 1937
 * Albert Goodman
 * Leslie Haden-Guest
 * Death
 * Glasgow Springburn
 * 7 September 1937
 * George Hardie
 * Agnes Hardie
 * Death
 * North Dorset
 * 13 July 1937
 * Cecil Hanbury
 * Angus Hambro
 * Death
 * Chertsey
 * 2 July 1937
 * Archibald Boyd-Carpenter
 * Arthur Marsden
 * Death
 * Kingston-upon-Thames
 * 1 July 1937
 * Frederick Penny
 * Percy Royds
 * Elevation to the peerage
 * St Ives
 * 30 June 1937
 * Walter Runciman
 * Alec Beechman
 * Elevation to the peerage
 * Ilford
 * 29 June 1937
 * George Hamilton
 * Geoffrey Hutchinson
 * Resignation
 * Bewdley
 * 29 June 1937
 * Stanley Baldwin
 * Roger Conant
 * Elevation to the peerage
 * Holland with Boston
 * 24 June 1937
 * James Blindell
 * Herbert Butcher
 * Death
 * Hemel Hempstead
 * 22 June 1937
 * John Davidson
 * Frances Davidson
 * Elevation to the peerage
 * - bgcolor="#c0c0c0"
 * Cheltenham
 * 22 June 1937
 * Walter Preston
 * Daniel Lipson
 * Conservative
 * Resignation
 * Plymouth Drake
 * 15 June 1937
 * Frederick Guest
 * Henry Guest
 * Death
 * Buckingham
 * 11 June 1937
 * George Bowyer
 * John Whiteley
 * Elevation to the peerage
 * Glasgow Hillhead
 * 10 June 1937
 * Robert Horne
 * James Reid
 * Elevation to the peerage
 * York
 * 6 May 1937
 * Lawrence Lumley
 * Charles Wood
 * Appointed Governor of Bombay
 * Birmingham West
 * 29 April 1937
 * Austen Chamberlain
 * Walter Higgs
 * Death
 * - bgcolor=pink
 * Wandsworth Central
 * 29 April 1937
 * Henry Jackson
 * Harry Nathan
 * Death
 * Stalybridge and Hyde
 * 28 April 1937
 * Philip Dunne
 * Horace Trevor-Cox
 * Resignation
 * Farnham
 * 23 March 1937
 * Arthur Samuel
 * Godfrey Nicholson
 * Elevation to the peerage
 * Tonbridge
 * 23 March 1937
 * Herbert Henry Spender-Clay
 * Adrian Baillie
 * Death
 * - bgcolor="#c0c0c0"
 * Combined English Universities
 * 22 March 1937
 * Reginald Craddock
 * Edmund Harvey
 * Death
 * - bgcolor="#c0c0c0"
 * Oxford University
 * 27 February 1937
 * Lord Hugh Cecil
 * Arthur Salter
 * Appointment as Provost of Eton College
 * Richmond-upon-Thames
 * 25 February 1937
 * William Ray
 * George Harvie-Watt
 * Resignation
 * Manchester Gorton
 * 18 February 1937
 * Joseph Compton
 * William Wedgwood Benn
 * Death
 * St Pancras North
 * 4 February 1937
 * Ian Fraser
 * Robert Grant-Ferris
 * Resignation
 * - bgcolor=pink
 * Greenock
 * 26 November 1936
 * Godfrey Collins
 * Robert Gibson
 * Death
 * Preston
 * 25 November 1936
 * William Kirkpatrick
 * Edward Cobb
 * Resignation
 * Clay Cross
 * 5 November 1936
 * Alfred Holland
 * George Ridley
 * Death
 * Birmingham Erdington
 * 20 October 1936
 * John Eales
 * John Wright
 * Death
 * East Grinstead
 * 23 July 1936
 * Henry Cautley
 * Ralph Clarke
 * Elevation to the peerage
 * Balham and Tooting
 * 23 July 1936
 * Sir Alfred Butt, 1st Baronet
 * George Doland
 * Resignation
 * - bgcolor=pink
 * Derby
 * 9 July 1936
 * J. H. Thomas
 * Philip Noel-Baker
 * Resigned over budget leak
 * Lewes
 * 18 June 1936
 * John Loder
 * Tufton Beamish
 * Elevation to the peerage
 * - bgcolor=pink
 * Peckham
 * 6 May 1936
 * David Beatty
 * Lewis Silkin
 * Succession to peerage
 * Llanelli
 * 26 March 1936
 * John Williams
 * Jim Griffiths
 * Death
 * - bgcolor=pink
 * Dunbartonshire
 * 18 March 1936
 * Archibald Cochrane
 * Thomas Cassells
 * Governor of Burma
 * - bgcolor="#c0c0c0"
 * Ross and Cromarty
 * 10 February 1936
 * Sir Ian Macpherson
 * Malcolm MacDonald
 * Peerage to provide seat for Dominions Secretary Malcolm MacDonald
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 31 January 1936
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Colne Valley
 * 27 July 1939
 * Ernest Marklew
 * Glenvil Hall
 * Death
 * Monmouth
 * 25 July 1939
 * John Herbert
 * Leslie Pym
 * Appointment as Governor of Bengal
 * Hythe
 * 20 July 1939
 * Philip Sassoon
 * Rupert Brabner
 * Death
 * North Cornwall
 * 13 July 1939
 * Francis Dyke Acland
 * Tom Horabin
 * Death
 * Portsmouth South
 * 12 July 1939
 * Herbert Cayzer
 * Jocelyn Lucas
 * Elevation to the peerage
 * Caerphilly
 * 4 July 1939
 * Morgan Jones
 * Ness Edwards
 * Death
 * - bgcolor=pink
 * Kennington
 * 24 May 1939
 * George Harvey
 * John Wilmot
 * Death
 * Birmingham Aston
 * 17 May 1939
 * Arthur Hope
 * Edward Kellett
 * Resignation
 * - bgcolor=pink
 * Southwark North
 * 19 May 1939
 * Edward Strauss
 * George Isaacs
 * Death
 * Westminster Abbey
 * 17 May 1939
 * Sidney Herbert
 * Harold Webbe
 * Death
 * Sheffield Hallam
 * 10 May 1939
 * Louis Smith
 * Roland Jennings
 * Death
 * Down
 * 10 May 1939
 * David Reid
 * James Little
 * Death
 * South Ayrshire
 * 20 April 1939
 * James Brown
 * Alexander Sloan
 * Death
 * Kincardineshire and West Aberdeenshire
 * 30 March 1939
 * Malcolm Barclay-Harvey
 * Colin Thornton-Kemsley
 * Resignation
 * Batley and Morley
 * 9 March 1939
 * Willie Brooke
 * Hubert Beaumont
 * Death
 * Ripon
 * 23 February 1939
 * John Waller Hills
 * Christopher York
 * Death
 * Holderness
 * 15 February 1939
 * Samuel Savery
 * Gurney Braithwaite
 * Death
 * East Norfolk
 * 26 January 1939
 * William Lygon
 * Frank Medlicott
 * Succession to the peerage
 * Kinross and Western Perthshire
 * 21 December 1938
 * The Duchess of Atholl
 * /Ind Conservative
 * William McNair Snadden
 * Sought re-election in opposition to government foreign policy
 * Fylde
 * 30 November 1938
 * Edward Stanley
 * Claude Lancaster
 * Death
 * Lewisham West
 * 24 November 1938
 * Philip Dawson
 * Henry Brooke
 * Death
 * Doncaster
 * 17 November 1938
 * Alfred Short
 * John Morgan
 * Death
 * - bgcolor="#c0c0c0"
 * Bridgwater
 * 17 November 1938
 * Reginald Croom-Johnson
 * Vernon Bartlett
 * Appointment as High Court Judge
 * Walsall
 * 16 November 1938
 * Joseph Leckie
 * George Schuster
 * Death
 * - bgcolor=pink
 * Dartford
 * 7 November 1938
 * Frank Edward Clarke
 * Jennie Adamson
 * Death
 * Oxford
 * 27 October 1938
 * Robert Bourne
 * Quintin Hogg
 * Death
 * Willesden East
 * 28 July 1938
 * Daniel Somerville
 * Samuel Hammersley
 * Death
 * Barnsley
 * 16 June 1938
 * John Potts
 * Frank Collindridge
 * Death
 * Stafford
 * 9 June 1938
 * William Ormsby-Gore
 * Peter Thorneycroft
 * Succession to the peerage
 * West Derbyshire
 * 2 June 1938
 * Edward Cavendish
 * Henry Hunloke
 * Succession to the peerage
 * Aylesbury
 * 19 May 1938
 * Michael Beaumont
 * Stanley Reed
 * Resignation
 * - bgcolor=pink
 * Lichfield
 * 5 May 1938
 * James Lovat-Fraser
 * Cecil Poole
 * Death
 * - bgcolor=pink
 * Fulham West
 * 6 April 1938
 * Cyril Cobb
 * Edith Summerskill
 * Death
 * City of London
 * 6 April 1938
 * Vansittart Bowater
 * George Broadbridge
 * Death
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 25 February 1938
 * Ramsay MacDonald
 * Sir John Anderson
 * Death
 * - bgcolor=pink
 * Ipswich
 * 16 February 1938
 * John Ganzoni
 * Richard Stokes
 * Elevation to the peerage
 * Pontypridd
 * 11 February 1938
 * David Lewis Davies
 * Arthur Pearson
 * Death
 * Farnworth
 * 27 January 1938
 * Guy Rowson
 * George Tomlinson
 * Death
 * Hastings
 * 24 November 1937
 * Eustace Percy
 * Maurice Hely-Hutchinson
 * Resignation
 * - bgcolor=pink
 * Islington North
 * 13 October 1937
 * Albert Goodman
 * Leslie Haden-Guest
 * Death
 * Glasgow Springburn
 * 7 September 1937
 * George Hardie
 * Agnes Hardie
 * Death
 * North Dorset
 * 13 July 1937
 * Cecil Hanbury
 * Angus Hambro
 * Death
 * Chertsey
 * 2 July 1937
 * Archibald Boyd-Carpenter
 * Arthur Marsden
 * Death
 * Kingston-upon-Thames
 * 1 July 1937
 * Frederick Penny
 * Percy Royds
 * Elevation to the peerage
 * St Ives
 * 30 June 1937
 * Walter Runciman
 * Alec Beechman
 * Elevation to the peerage
 * Ilford
 * 29 June 1937
 * George Hamilton
 * Geoffrey Hutchinson
 * Resignation
 * Bewdley
 * 29 June 1937
 * Stanley Baldwin
 * Roger Conant
 * Elevation to the peerage
 * Holland with Boston
 * 24 June 1937
 * James Blindell
 * Herbert Butcher
 * Death
 * Hemel Hempstead
 * 22 June 1937
 * John Davidson
 * Frances Davidson
 * Elevation to the peerage
 * - bgcolor="#c0c0c0"
 * Cheltenham
 * 22 June 1937
 * Walter Preston
 * Daniel Lipson
 * Conservative
 * Resignation
 * Plymouth Drake
 * 15 June 1937
 * Frederick Guest
 * Henry Guest
 * Death
 * Buckingham
 * 11 June 1937
 * George Bowyer
 * John Whiteley
 * Elevation to the peerage
 * Glasgow Hillhead
 * 10 June 1937
 * Robert Horne
 * James Reid
 * Elevation to the peerage
 * York
 * 6 May 1937
 * Lawrence Lumley
 * Charles Wood
 * Appointed Governor of Bombay
 * Birmingham West
 * 29 April 1937
 * Austen Chamberlain
 * Walter Higgs
 * Death
 * - bgcolor=pink
 * Wandsworth Central
 * 29 April 1937
 * Henry Jackson
 * Harry Nathan
 * Death
 * Stalybridge and Hyde
 * 28 April 1937
 * Philip Dunne
 * Horace Trevor-Cox
 * Resignation
 * Farnham
 * 23 March 1937
 * Arthur Samuel
 * Godfrey Nicholson
 * Elevation to the peerage
 * Tonbridge
 * 23 March 1937
 * Herbert Henry Spender-Clay
 * Adrian Baillie
 * Death
 * - bgcolor="#c0c0c0"
 * Combined English Universities
 * 22 March 1937
 * Reginald Craddock
 * Edmund Harvey
 * Death
 * - bgcolor="#c0c0c0"
 * Oxford University
 * 27 February 1937
 * Lord Hugh Cecil
 * Arthur Salter
 * Appointment as Provost of Eton College
 * Richmond-upon-Thames
 * 25 February 1937
 * William Ray
 * George Harvie-Watt
 * Resignation
 * Manchester Gorton
 * 18 February 1937
 * Joseph Compton
 * William Wedgwood Benn
 * Death
 * St Pancras North
 * 4 February 1937
 * Ian Fraser
 * Robert Grant-Ferris
 * Resignation
 * - bgcolor=pink
 * Greenock
 * 26 November 1936
 * Godfrey Collins
 * Robert Gibson
 * Death
 * Preston
 * 25 November 1936
 * William Kirkpatrick
 * Edward Cobb
 * Resignation
 * Clay Cross
 * 5 November 1936
 * Alfred Holland
 * George Ridley
 * Death
 * Birmingham Erdington
 * 20 October 1936
 * John Eales
 * John Wright
 * Death
 * East Grinstead
 * 23 July 1936
 * Henry Cautley
 * Ralph Clarke
 * Elevation to the peerage
 * Balham and Tooting
 * 23 July 1936
 * Sir Alfred Butt, 1st Baronet
 * George Doland
 * Resignation
 * - bgcolor=pink
 * Derby
 * 9 July 1936
 * J. H. Thomas
 * Philip Noel-Baker
 * Resigned over budget leak
 * Lewes
 * 18 June 1936
 * John Loder
 * Tufton Beamish
 * Elevation to the peerage
 * - bgcolor=pink
 * Peckham
 * 6 May 1936
 * David Beatty
 * Lewis Silkin
 * Succession to peerage
 * Llanelli
 * 26 March 1936
 * John Williams
 * Jim Griffiths
 * Death
 * - bgcolor=pink
 * Dunbartonshire
 * 18 March 1936
 * Archibald Cochrane
 * Thomas Cassells
 * Governor of Burma
 * - bgcolor="#c0c0c0"
 * Ross and Cromarty
 * 10 February 1936
 * Sir Ian Macpherson
 * Malcolm MacDonald
 * Peerage to provide seat for Dominions Secretary Malcolm MacDonald
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 31 January 1936
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Buckingham
 * 11 June 1937
 * George Bowyer
 * John Whiteley
 * Elevation to the peerage
 * Glasgow Hillhead
 * 10 June 1937
 * Robert Horne
 * James Reid
 * Elevation to the peerage
 * York
 * 6 May 1937
 * Lawrence Lumley
 * Charles Wood
 * Appointed Governor of Bombay
 * Birmingham West
 * 29 April 1937
 * Austen Chamberlain
 * Walter Higgs
 * Death
 * - bgcolor=pink
 * Wandsworth Central
 * 29 April 1937
 * Henry Jackson
 * Harry Nathan
 * Death
 * Stalybridge and Hyde
 * 28 April 1937
 * Philip Dunne
 * Horace Trevor-Cox
 * Resignation
 * Farnham
 * 23 March 1937
 * Arthur Samuel
 * Godfrey Nicholson
 * Elevation to the peerage
 * Tonbridge
 * 23 March 1937
 * Herbert Henry Spender-Clay
 * Adrian Baillie
 * Death
 * - bgcolor="#c0c0c0"
 * Combined English Universities
 * 22 March 1937
 * Reginald Craddock
 * Edmund Harvey
 * Death
 * - bgcolor="#c0c0c0"
 * Oxford University
 * 27 February 1937
 * Lord Hugh Cecil
 * Arthur Salter
 * Appointment as Provost of Eton College
 * Richmond-upon-Thames
 * 25 February 1937
 * William Ray
 * George Harvie-Watt
 * Resignation
 * Manchester Gorton
 * 18 February 1937
 * Joseph Compton
 * William Wedgwood Benn
 * Death
 * St Pancras North
 * 4 February 1937
 * Ian Fraser
 * Robert Grant-Ferris
 * Resignation
 * - bgcolor=pink
 * Greenock
 * 26 November 1936
 * Godfrey Collins
 * Robert Gibson
 * Death
 * Preston
 * 25 November 1936
 * William Kirkpatrick
 * Edward Cobb
 * Resignation
 * Clay Cross
 * 5 November 1936
 * Alfred Holland
 * George Ridley
 * Death
 * Birmingham Erdington
 * 20 October 1936
 * John Eales
 * John Wright
 * Death
 * East Grinstead
 * 23 July 1936
 * Henry Cautley
 * Ralph Clarke
 * Elevation to the peerage
 * Balham and Tooting
 * 23 July 1936
 * Sir Alfred Butt, 1st Baronet
 * George Doland
 * Resignation
 * - bgcolor=pink
 * Derby
 * 9 July 1936
 * J. H. Thomas
 * Philip Noel-Baker
 * Resigned over budget leak
 * Lewes
 * 18 June 1936
 * John Loder
 * Tufton Beamish
 * Elevation to the peerage
 * - bgcolor=pink
 * Peckham
 * 6 May 1936
 * David Beatty
 * Lewis Silkin
 * Succession to peerage
 * Llanelli
 * 26 March 1936
 * John Williams
 * Jim Griffiths
 * Death
 * - bgcolor=pink
 * Dunbartonshire
 * 18 March 1936
 * Archibald Cochrane
 * Thomas Cassells
 * Governor of Burma
 * - bgcolor="#c0c0c0"
 * Ross and Cromarty
 * 10 February 1936
 * Sir Ian Macpherson
 * Malcolm MacDonald
 * Peerage to provide seat for Dominions Secretary Malcolm MacDonald
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 31 January 1936
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Ralph Clarke
 * Elevation to the peerage
 * Balham and Tooting
 * 23 July 1936
 * Sir Alfred Butt, 1st Baronet
 * George Doland
 * Resignation
 * - bgcolor=pink
 * Derby
 * 9 July 1936
 * J. H. Thomas
 * Philip Noel-Baker
 * Resigned over budget leak
 * Lewes
 * 18 June 1936
 * John Loder
 * Tufton Beamish
 * Elevation to the peerage
 * - bgcolor=pink
 * Peckham
 * 6 May 1936
 * David Beatty
 * Lewis Silkin
 * Succession to peerage
 * Llanelli
 * 26 March 1936
 * John Williams
 * Jim Griffiths
 * Death
 * - bgcolor=pink
 * Dunbartonshire
 * 18 March 1936
 * Archibald Cochrane
 * Thomas Cassells
 * Governor of Burma
 * - bgcolor="#c0c0c0"
 * Ross and Cromarty
 * 10 February 1936
 * Sir Ian Macpherson
 * Malcolm MacDonald
 * Peerage to provide seat for Dominions Secretary Malcolm MacDonald
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 31 January 1936
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Thomas Cassells
 * Governor of Burma
 * - bgcolor="#c0c0c0"
 * Ross and Cromarty
 * 10 February 1936
 * Sir Ian Macpherson
 * Malcolm MacDonald
 * Peerage to provide seat for Dominions Secretary Malcolm MacDonald
 * - bgcolor="#c0c0c0"
 * Combined Scottish Universities
 * 31 January 1936
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Noel Skelton
 * Ramsay MacDonald
 * Death
 * colspan=9|
 * Death
 * colspan=9|
 * colspan=9|

1931–1935 Parliament
!By-election !! Date !! Incumbent !! colspan=2 | Party !! Winner !! colspan=2 | Party !! Cause
 * Dumfriesshire
 * 12 September 1935
 * Joseph Hunter
 * / National Liberal
 * Henry Fildes
 * Death
 * Sevenoaks
 * 20 July 1935
 * Edward Young
 * Charles Ponsonby
 * Created Baron Kennet
 * - bgcolor=pink
 * Liverpool West Toxteth
 * 16 July 1935
 * Clyde Tabor Wilson
 * Joseph Gibbins
 * Appointment as a Metropolitan Police Magistrate
 * Liverpool West Derby
 * 6 July 1935
 * John Sandeman Allen
 * David Maxwell Fyfe
 * Death
 * City of London
 * 26 June 1935
 * Edward Grenfell
 * Alan Anderson
 * Resigned, later created Baron St Just
 * Combined Scottish Universities
 * 17–22 June 1935
 * John Buchan
 * John Graham Kerr
 * Appointed Governor General of Canada
 * Aberdeen South
 * 21 May 1935
 * Sir Frederick Thomson
 * Sir Douglas Thomson
 * Death
 * Tamworth
 * 10 May 1935
 * Arthur Steel-Maitland
 * John Mellor
 * Death
 * Edinburgh West
 * 2 May 1935
 * Wilfrid Normand
 * Thomas Cooper
 * Appointed as Lord Justice General
 * Perth
 * 16 April 1935
 * Lord Scone
 * Francis Norie-Miller
 * Succession to the peerage
 * Eastbourne
 * 29 March 1935
 * John Slater
 * Charles Taylor
 * Death
 * Norwood
 * 14 March 1935
 * Walter Greaves-Lord
 * Duncan Sandys
 * Resignation
 * Cambridge University
 * 23 February 1935
 * Godfrey Wilson
 * Kenneth Pickthorn
 * Resignation
 * - bgcolor=pink
 * Liverpool Wavertree
 * 6 February 1935
 * Ronald Nall-Cain
 * Joseph Cleary
 * Succession to the peerage
 * Putney
 * 28 November 1934
 * Samuel Samuel
 * Marcus Samuel
 * Death
 * - bgcolor=pink
 * Swindon
 * 25 October 1934
 * Reginald Mitchell Banks
 * Christopher Addison
 * Appointment as County Court Judge
 * - bgcolor=pink
 * Lambeth North
 * 23 October 1934
 * Frank Briant
 * George Strauss
 * Death
 * Rushcliffe
 * 26 July 1934
 * Henry Betterton
 * Ralph Assheton
 * Resignation
 * Fermanagh and Tyrone
 * 27 June 1934
 * Joseph Devlin
 * Joseph Francis Stewart
 * Death
 * Weston-super-Mare
 * 26 June 1934
 * James Erskine
 * Ian Orr-Ewing
 * Resignation
 * Twickenham
 * 22 June 1934
 * Hylton Murray-Philipson
 * Alfred Critchley
 * Death
 * Monmouth
 * 14 June 1934
 * Leolin Forestier-Walker
 * J. A. Herbert
 * Death
 * - bgcolor=pink
 * Merthyr
 * 5 June 1934
 * Richard Wallhead
 * / Labour
 * S. O. Davies
 * Death
 * Hemsworth
 * 17 May 1934
 * John Guest
 * George Griffiths
 * Death
 * - bgcolor=pink
 * Upton
 * 14 May 1934
 * Alfred Chotzner
 * Benjamin Walter Gardner
 * Resignation
 * - bgcolor=pink
 * Hammersmith North
 * 24 April 1934
 * Mary Pickford
 * Fielding West
 * Death
 * Basingstoke
 * 19 April 1934
 * Gerard Wallop
 * Henry Drummond Wolff
 * Resignation
 * Combined Scottish Universities
 * 7–12 March 1934
 * Dugald Cowan
 * George Morrison
 * Death
 * Portsmouth North
 * 19 February 1934
 * Bertram Godfray
 * Roger Keyes
 * Elevation to the peerage
 * Lowestoft
 * 15 February 1934
 * Gervais Rentoul
 * Pierse Loftus
 * Resignation
 * Cambridge
 * 8 February 1934
 * George Newton
 * Richard Tufnell
 * Elevation to the peerage
 * Wentworth
 * 22 December 1933
 * George Henry Hirst
 * Wilfred Paling
 * Death
 * Harborough
 * 28 November 1933
 * Arthur Stuart
 * Arthur Tree
 * Resignation
 * Rutland and Stamford
 * 21 November 1933
 * Neville Smith-Carington
 * Lord Willoughby de Eresby
 * Death
 * Manchester Rusholme
 * 21 November 1933
 * Frank Merriman
 * Edmund Radford
 * Appointment to High Court
 * Skipton
 * 7 November 1933
 * Ernest Bird
 * George Rickards
 * Death
 * Kilmarnock
 * 2 November 1933
 * Craigie Aitchison
 * Kenneth Lindsay
 * Appointment to Scottish bench
 * - bgcolor=pink
 * Fulham East
 * 25 October 1933
 * Kenyon Vaughan-Morgan
 * John Charles Wilmot
 * Death
 * Clay Cross
 * 1 September 1933
 * Charles Duncan
 * Arthur Henderson
 * Death
 * Altrincham
 * 14 June 1933
 * Cyril Atkinson
 * Edward Grigg
 * Appointment to High Court
 * Hitchin
 * 8 June 1933
 * Edward Lytton
 * Arnold Wilson
 * Death
 * Normanton
 * 8 May 1933
 * Frederick Hall
 * Tom Smith
 * Death
 * Rhondda East
 * 28 March 1933
 * David Watts-Morgan
 * William Mainwaring
 * Death
 * Ashford
 * 17 March 1933
 * Michael Knatchbull
 * Patrick Spens
 * Succession to the peerage
 * - bgcolor=pink
 * Rotherham
 * 27 February 1933
 * George Herbert
 * William Dobbie
 * Resignation
 * East Fife
 * 2 February 1933
 * Sir James Millar
 * James Henderson-Stewart
 * Death
 * Liverpool Exchange
 * 19 January 1933
 * Sir James Reynolds
 * John Shute
 * Death
 * Cardiganshire
 * 22 September 1932
 * Rhys Hopkin Morris
 * Owen Evans
 * Appointment as a Metropolitan Police magistrate
 * Twickenham
 * 16 September 1932
 * John Ferguson
 * Hylton Murray-Philipson
 * Death
 * - bgcolor=pink
 * Wednesbury
 * 26 July 1932
 * William Ward
 * William Banfield
 * Succession to the peerage
 * North Cornwall
 * 22 July 1932
 * Donald Maclean
 * Francis Dyke Acland
 * Death
 * Westminster Abbey
 * 12 July 1932
 * Otho Nicholson
 * Sidney Herbert
 * Resignation
 * Montrose Burghs
 * 28 June 1932
 * Robert Hutchison
 * Charles Kerr
 * Elevation to the peerage
 * Dulwich
 * 8 June 1932
 * Sir Frederick Hall
 * Bracewell Smith
 * Death
 * St Marylebone
 * 28 April 1932
 * Rennell Rodd
 * Alec Cunningham-Reid
 * Resignation
 * Eastbourne
 * 28 April 1932
 * Edward Marjoribanks
 * John Slater
 * Death
 * - bgcolor=pink
 * Wakefield
 * 21 April 1932
 * George Brown Hillman
 * Arthur Greenwood
 * Death
 * Richmond-upon-Thames
 * 13 April 1932
 * Newton Moore
 * William Ray
 * Resignation
 * Dunbartonshire
 * 17 March 1932
 * John Thom
 * Archibald Cochrane
 * Resignation
 * Henley
 * 25 February 1932
 * Robert Henderson
 * Sir Gifford Fox, Bt.
 * Death
 * New Forest and Christchurch
 * 9 February 1932
 * Wilfrid Ashley
 * John Mills
 * Elevation to the peerage
 * Croydon South
 * 9 February 1932
 * William Mitchell-Thomson
 * Herbert Williams
 * Resignation
 * colspan=9|
 * Arnold Wilson
 * Death
 * Normanton
 * 8 May 1933
 * Frederick Hall
 * Tom Smith
 * Death
 * Rhondda East
 * 28 March 1933
 * David Watts-Morgan
 * William Mainwaring
 * Death
 * Ashford
 * 17 March 1933
 * Michael Knatchbull
 * Patrick Spens
 * Succession to the peerage
 * - bgcolor=pink
 * Rotherham
 * 27 February 1933
 * George Herbert
 * William Dobbie
 * Resignation
 * East Fife
 * 2 February 1933
 * Sir James Millar
 * James Henderson-Stewart
 * Death
 * Liverpool Exchange
 * 19 January 1933
 * Sir James Reynolds
 * John Shute
 * Death
 * Cardiganshire
 * 22 September 1932
 * Rhys Hopkin Morris
 * Owen Evans
 * Appointment as a Metropolitan Police magistrate
 * Twickenham
 * 16 September 1932
 * John Ferguson
 * Hylton Murray-Philipson
 * Death
 * - bgcolor=pink
 * Wednesbury
 * 26 July 1932
 * William Ward
 * William Banfield
 * Succession to the peerage
 * North Cornwall
 * 22 July 1932
 * Donald Maclean
 * Francis Dyke Acland
 * Death
 * Westminster Abbey
 * 12 July 1932
 * Otho Nicholson
 * Sidney Herbert
 * Resignation
 * Montrose Burghs
 * 28 June 1932
 * Robert Hutchison
 * Charles Kerr
 * Elevation to the peerage
 * Dulwich
 * 8 June 1932
 * Sir Frederick Hall
 * Bracewell Smith
 * Death
 * St Marylebone
 * 28 April 1932
 * Rennell Rodd
 * Alec Cunningham-Reid
 * Resignation
 * Eastbourne
 * 28 April 1932
 * Edward Marjoribanks
 * John Slater
 * Death
 * - bgcolor=pink
 * Wakefield
 * 21 April 1932
 * George Brown Hillman
 * Arthur Greenwood
 * Death
 * Richmond-upon-Thames
 * 13 April 1932
 * Newton Moore
 * William Ray
 * Resignation
 * Dunbartonshire
 * 17 March 1932
 * John Thom
 * Archibald Cochrane
 * Resignation
 * Henley
 * 25 February 1932
 * Robert Henderson
 * Sir Gifford Fox, Bt.
 * Death
 * New Forest and Christchurch
 * 9 February 1932
 * Wilfrid Ashley
 * John Mills
 * Elevation to the peerage
 * Croydon South
 * 9 February 1932
 * William Mitchell-Thomson
 * Herbert Williams
 * Resignation
 * colspan=9|
 * Rennell Rodd
 * Alec Cunningham-Reid
 * Resignation
 * Eastbourne
 * 28 April 1932
 * Edward Marjoribanks
 * John Slater
 * Death
 * - bgcolor=pink
 * Wakefield
 * 21 April 1932
 * George Brown Hillman
 * Arthur Greenwood
 * Death
 * Richmond-upon-Thames
 * 13 April 1932
 * Newton Moore
 * William Ray
 * Resignation
 * Dunbartonshire
 * 17 March 1932
 * John Thom
 * Archibald Cochrane
 * Resignation
 * Henley
 * 25 February 1932
 * Robert Henderson
 * Sir Gifford Fox, Bt.
 * Death
 * New Forest and Christchurch
 * 9 February 1932
 * Wilfrid Ashley
 * John Mills
 * Elevation to the peerage
 * Croydon South
 * 9 February 1932
 * William Mitchell-Thomson
 * Herbert Williams
 * Resignation
 * colspan=9|
 * Robert Henderson
 * Sir Gifford Fox, Bt.
 * Death
 * New Forest and Christchurch
 * 9 February 1932
 * Wilfrid Ashley
 * John Mills
 * Elevation to the peerage
 * Croydon South
 * 9 February 1932
 * William Mitchell-Thomson
 * Herbert Williams
 * Resignation
 * colspan=9|
 * Croydon South
 * 9 February 1932
 * William Mitchell-Thomson
 * Herbert Williams
 * Resignation
 * colspan=9|
 * Resignation
 * colspan=9|
 * colspan=9|
 * }