# List of United Kingdom by-elections (1857–1868)

This is a list of parliamentary by-elections in the United Kingdom held between 1857 and 1868, with the names of the previous incumbent and the victor in the by-election and their respective parties. Where seats changed political party at the election, the result is highlighted: light blue for a Conservative gain, orange for a Whig (after 1859 Liberal) gain, and grey for any other gain.

## Resignations

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

## By-elections

19th Parliament (1865–1868) :
| By-election | Date | Former incumbent | Party | Party | Winner | Party | Party | Cause |
| Clitheroe | 13 July 1868 | Richard Fort | | Liberal | Ralph Assheton | | Conservative | Death |
| Stamford | 24 June 1868 | Viscount Ingestre | | Conservative | William Unwin Heygate | | Conservative | Succession to a peerage |
| Dublin City | 1 June 1868 | Benjamin Guinness | | Conservative | Arthur Guinness | | Conservative | Resignation |
| East Worcestershire | 1 June 1868 | Frederick Gough-Calthorpe | | Liberal | Hon. Charles Lyttelton | | Liberal | Succession to a peerage |
| Stamford | 4 May 1868 | Viscount Cranborne | | Conservative | Viscount Ingestre | | Conservative | Succession to a peerage |
| East Kent | 2 May 1868 | Brook Bridges | | Conservative | Edward Leigh Pemberton | | Conservative | Elevation to the peerage |
| Stirling Burghs | 30 April 1868 | Laurence Oliphant | | Liberal | John Ramsay | | Liberal | Resignation |
| Bristol | 30 April 1868 | Samuel Morton Peto | | Liberal | John William Miles | | Conservative | Resignation |
| South Lincolnshire | 29 April 1868 | John Trollope | | Conservative | William Earle Welby | | Conservative | Elevation to the peerage |
| Radnorshire | 28 April 1868 | John Walsh | | Conservative | Arthur Walsh | | Conservative | Elevation to the peerage |
| Leominster | 27 April 1868 | Arthur Walsh | | Conservative | Viscount Mahon | | Conservative | Resignation to contest Radnorshire |
| Grantham | 27 April 1868 | William Earle Welby | | Conservative | Edmund Turnor | | Conservative | Resignation to contest South Lincolnshire |
| Cockermouth | 27 April 1868 | John Steel | | Liberal | Andrew Green Thompson | | Conservative | Death |
| Wycombe | 11 April 1868 | Charles Carington | | Liberal | William Carington | | Liberal | Succession to a peerage |
| Launceston | 9 April 1868 | Alexander Henry Campbell | | Conservative | Henry Lopes | | Conservative | Resignation |
| Coventry | 26 March 1868 | Henry Jackson | | Liberal | Samuel Carter | | Liberal | Void election |
| Huddersfield | 20 March 1868 | Thomas Crosland | | Liberal | Edward Aldam Leatham | | Liberal | Death |
| North Northamptonshire | 7 March 1868 | George Ward Hunt | | Conservative | George Ward Hunt | | Conservative | Chancellor of the Exchequer |
| Argyllshire | 3 March 1868 | Alexander Struthers Finlay | | Liberal | Marquess of Lorne | | Liberal | Resignation |
| Cambridge University | 24 February 1868 | Charles Jasper Selwyn | | Conservative | Alexander Beresford Hope | | Conservative | Resignation (Judge of the Court of Appeal in Chancery) |
| Stoke-upon-Trent | 20 February 1868 | Alexander Beresford Hope | | Conservative | George Melly | | Liberal | Resignation to contest Cambridge University |
| Helston | 19 February 1868 | William Brett | | Conservative | William Brett | | Conservative | Solicitor General for England and Wales |
| Kirkcudbright | 30 January 1868 | James Mackie | | Liberal | Wellwood Herries Maxwell | | Liberal | Death |
| Westmorland | 8 January 1868 | Henry Lowther | | Conservative | William Lowther | | Conservative | Death |
| Thetford | 2 December 1867 | Alexander Baring | | Conservative | Edward Gordon | | Conservative | Resignation |
| South Leicestershire | 30 November 1867 | Charles William Packe | | Conservative | Thomas Paget | | Liberal | Death |
| Manchester | 27 November 1867 | Edward James | | Liberal | Jacob Bright | | Liberal | Death |
| Rutland | 23 November 1867 | Gilbert Heathcote | | Liberal | George Finch | | Conservative | Succession to a peerage |
| Bradford | 16 October 1867 | Henry Wickham Wickham | | Conservative | Matthew William Thompson | | Liberal | Death |
| Galway County | 12 September 1867 | Lord Dunkellin | | Liberal | Viscount Burke | | Liberal | Death |
| Dublin University | 27 August 1867 | Hedges Eyre Chatterton | | Conservative | Robert Warren | | Conservative | Resignation (Vice-Chancellor of Ireland) |
| Stroud | 20 August 1867 | George Poulett Scrope | | Liberal | Henry Winterbotham | | Liberal | Resignation |
| Downpatrick | 5 August 1867 | David Stewart Ker | | Conservative | William Keown | | Conservative | Resignation |
| West Gloucestershire | 25 July 1867 | John Rolt | | Conservative | Edward Arthur Somerset | | Conservative | Resignation (Lord Justice of Appeal) |
| Coventry | 23 July 1867 | Morgan Treherne | | Conservative | Henry Jackson | | Liberal | Death |
| Birmingham | 23 July 1867 | William Scholefield | | Liberal | George Dixon | | Liberal | Death |
| Andover | 22 July 1867 | John Burgess Karslake | | Conservative | John Burgess Karslake | | Conservative | Attorney General for England and Wales |
| Cambridge University | 22 July 1867 | Charles Jasper Selwyn | | Conservative | Charles Jasper Selwyn | | Conservative | Solicitor General for England and Wales |
| North Lancashire | 1 July 1867 | John Wilson-Patten | | Conservative | John Wilson-Patten | | Conservative | Chancellor of the Duchy of Lancaster |
| Weymouth and Melcombe Regis | 11 June 1867 | Henry Gridley | | Liberal | Henry Edwards | | Liberal | Resignation |
| Sutherland | 27 May 1867 | David Dundas | | Liberal | Lord Ronald Gower | | Liberal | Resignation |
| Oxford University | 20 May 1867 | Gathorne Hardy | | Conservative | Gathorne Hardy | | Conservative | Home Secretary |
| Middlesex | 15 April 1867 | Robert Culling Hanbury | | Liberal | Henry Labouchère | | Liberal | Death |
| Galway Borough | 1 April 1867 | Michael Morris | | Conservative | George Morris | | Liberal | Resignation (Puisne Judge of the Court of Common Pleas in Ireland) |
| Dublin University | 30 March 1867 | Hedges Eyre Chatterton | | Conservative | Hedges Eyre Chatterton | | Conservative | Attorney-General for Ireland |
| Huntingdonshire | 25 March 1867 | Lord Robert Montagu | | Conservative | Lord Robert Montagu | | Conservative | Vice-President of the Committee on Education |
| Tyrone | 21 March 1867 | Henry Lowry-Corry | | Conservative | Henry Lowry-Corry | | Conservative | First Lord of the Admiralty |
| North Devon | 18 March 1867 | Stafford Northcote | | Conservative | Stafford Northcote | | Conservative | Secretary of State for India |
| Boston | 16 March 1867 | Meaburn Staniland | | Liberal | Thomas Parry | | Liberal | Resignation |
| North Shropshire | 14 March 1867 | Adelbert Brownlow-Cust | | Conservative | Viscount Newport | | Conservative | Succession to a peerage |
| Droitwich | 13 March 1867 | John Pakington | | Conservative | John Pakington | | Conservative | Secretary of State for War |
| South Shropshire | 8 March 1867 | Percy Egerton Herbert | | Conservative | Percy Egerton Herbert | | Conservative | Treasurer of the Household |
| North Riding of Yorkshire | 4 March 1867 | William Duncombe | | Conservative | Octavius Duncombe | | Conservative | Succession to a peerage |
| Cork County | 23 February 1867 | George Richard Barry | | Liberal | Arthur Smith-Barry | | Conservative | Death |
| East Suffolk | 20 February 1867 | Sir Edward Kerrison | | Conservative | Frederick Snowdon Corrance | | Conservative | Resignation |
| Colchester | 15 February 1867 | Taverner John Miller | | Conservative | Edward Karslake | | Conservative | Resignation (Chief Justice of the Common Pleas) |
| North Northamptonshire | 13 February 1867 | Lord Burghley | | Conservative | Sackville Stopford | | Conservative | Succession to a peerage |
| Galway Borough | 12 February 1867 | Michael Morris | | Conservative | Michael Morris | | Conservative | Attorney General for Ireland |
| Dublin University | 12 February 1867 | John Edward Walsh | | Conservative | Hedges Eyre Chatterton | | Conservative | Resignation (Master of the Rolls in Ireland) |
| Andover | 11 February 1867 | William Henry Humphery | | Conservative | John Burgess Karslake | | Conservative | Resignation |
| Armagh City | 30 January 1867 | Stearne Ball Miller | | Conservative | John Vance | | Conservative | Resignation (Judge in Bankruptcy in Ireland) |
| County Waterford | 31 December 1866 | Earl of Tyrone | | Conservative | Edmond de la Poer | | Liberal | Succession to a peerage |
| Guildford | 17 December 1866 | William Bovill | | Conservative | Richard Garth | | Conservative | Resignation (Chief Justice of the Common Pleas) |
| Pembrokeshire | 26 November 1866 | George Lort Phillips | | Conservative | James Bevan Bowen | | Conservative | Death |
| Belfast | 22 November 1866 | Hugh Cairns | | Conservative | Charles Lanyon | | Conservative | Resignation (Lord Justice of Appeal of England and Wales) |
| West Gloucestershire | 15 November 1866 | John Rolt | | Conservative | John Rolt | | Conservative | Attorney General for England and Wales |
| County Wexford | 15 November 1866 | John George | | Conservative | Arthur MacMorrough Kavanagh | | Conservative | Resignation (Judge in Bankruptcy in Ireland) |
| Tipperary | 22 October 1866 | John Blake Dillon | | Liberal | Charles William White | | Liberal | Death |
| Penryn and Falmouth | 15 October 1866 | Thomas Baring | | Liberal | Jervoise Smith | | Liberal | Succession to a peerage |
| Brecon | 3 October 1866 | Earl of Brecknock | | Liberal | Howel Gwyn | | Conservative | Succession to a peerage |
| North Shropshire | 17 August 1866 | Charles Cust | | Conservative | Adelbert Brownlow-Cust | | Conservative | Resignation |
| Caenarvonshire | 14 August 1866 | Edward Douglas-Pennant | | Conservative | George Douglas-Pennant | | Conservative | Elevation to the peerage |
| Abingdon | 6 August 1866 | Charles Lindsay | | Conservative | Charles Lindsay | | Conservative | Groom in Waiting |
| Galway Borough | 2 August 1866 | Michael Morris | | Liberal | Michael Morris | | Conservative | Solicitor General for Ireland |
| Dublin University | 30 July 1866 | James Whiteside | | Conservative | John Edward Walsh | | Conservative | Resignation (Lord Chief Justice of Ireland) |
| Eye | 27 July 1866 | Edward Kerrison | | Conservative | George Barrington | | Conservative | Resignation to contest East Suffolk |
| East Suffolk | 25 July 1866 | The Lord Henniker | | Conservative | John Henniker-Major | | Conservative | Elevation to the peerage |
| East Suffolk | 25 July 1866 | Fitzroy Kelly | | Conservative | Edward Kerrison | | Conservative | Resignation (Lord Chief Baron of the Exchequer) |
| Peeblesshire | 24 July 1866 | Graham Graham-Montgomery | | Conservative | Graham Graham-Montgomery | | Conservative | Lord Commissioner of the Treasury |
| Petersfield | 23 July 1866 | William Jolliffe | | Conservative | William Nicholson | | Liberal | Elevation to the peerage |
| Hertfordshire | 23 July 1866 | Edward Bulwer-Lytton | | Conservative | Abel Smith | | Conservative | Elevation to the peerage |
| Bridgnorth | 21 July 1866 | Henry Whitmore | | Conservative | Henry Whitmore | | Conservative | Lord Commissioner of the Treasury |
| Tyrone | 20 July 1866 | Lord Claud Hamilton | | Conservative | Lord Claud Hamilton | | Conservative | Vice-Chamberlain of the Household |
| Tyrone | 18 July 1866 | Henry Lowry-Corry | | Conservative | Henry Lowry-Corry | | Conservative | Vice-President of the Committee of the Council on Education |
| Cambridgeshire | 17 July 1866 | Viscount Royston | | Conservative | Viscount Royston | | Conservative | Comptroller of the Household |
| Antrim | 17 July 1866 | George Henry Seymour | | Conservative | George Henry Seymour | | Conservative | Third Naval Lord |
| North Essex | 16 July 1866 | Charles Du Cane | | Conservative | Charles Du Cane | | Conservative | Civil Lord of the Admiralty |
| Rutlandshire | 14 July 1866 | Gerard Noel | | Conservative | Gerard Noel | | Conservative | Lord Commissioner of the Treasury |
| North Northamptonshire | 14 July 1866 | Lord Burghley | | Conservative | Lord Burghley | | Conservative | Treasurer of the Household |
| North Leicestershire | 14 July 1866 | Lord John Manners | | Conservative | Lord John Manners | | Conservative | First Commissioner of Works |
| North Devon | 14 July 1866 | Stafford Northcote | | Conservative | Stafford Northcote | | Conservative | President of the Board of Trade |
| New Shoreham | 14 July 1866 | Stephen Cave | | Conservative | Stephen Cave | | Conservative | Paymaster General and Vice-President of the Board of Trade |
| Belfast | 13 July 1866 | Hugh Cairns | | Conservative | Hugh Cairns | | Conservative | Attorney General for England and Wales |
| Buckinghamshire | 13 July 1866 | Benjamin Disraeli | | Conservative | Benjamin Disraeli | | Conservative | Chancellor of the Exchequer |
| Oxford University | 12 July 1866 | Gathorne Hardy | | Conservative | Gathorne Hardy | | Conservative | President of the Poor Law Board |
| Stamford | 12 July 1866 | Viscount Cranborne | | Conservative | Viscount Cranborne | | Conservative | Secretary of State for India |
| Stamford | 12 July 1866 | Sir John Dalrymple-Hay | | Conservative | Sir John Dalrymple-Hay | | Conservative | Fourth Naval Lord |
| Bridgewater | 12 July 1866 | George Patton | | Conservative | Philip Vanderbyl | | Liberal | Lord Advocate |
| Cambridge University | 11 July 1866 | Spencer Horatio Walpole | | Conservative | Spencer Horatio Walpole | | Conservative | Home Secretary |
| King's Lynn | 11 July 1866 | Lord Stanley | | Conservative | Lord Stanley | | Conservative | Foreign Secretary |
| Huntingdon | 11 July 1866 | Jonathan Peel | | Conservative | Jonathan Peel | | Conservative | Secretary of State for War |
| Guildford | 11 July 1866 | William Bovill | | Conservative | William Bovill | | Conservative | Solicitor General for England and Wales |
| Durham | 11 July 1866 | John Mowbray | | Conservative | John Mowbray | | Conservative | Judge Advocate General |
| Droitwich | 11 July 1866 | John Pakington | | Conservative | John Pakington | | Conservative | First Lord of the Admiralty |
| Cockermouth | 11 July 1866 | Lord Naas | | Conservative | Lord Naas | | Conservative | Chief Secretary for Ireland |
| Hertford | 30 June 1866 | Walter Townshend-Farquhar | | Conservative | Robert Dimsdale | | Conservative | Death |
| South Nottinghamshire | 18 June 1866 | Lord Stanhope | | Conservative | Thomas Thoroton-Hildyard | | Conservative | Succession to a peerage |
| Bridgewater | 7 June 1866 | Henry Westropp | | Conservative | George Patton | | Conservative | Void election |
| County Waterford | 7 June 1866 | John Esmonde | | Liberal | John Esmonde | | Liberal | Lord Commissioner of the Treasury |
| Winchester | 4 June 1866 | John Bonham-Carter | | Liberal | John Bonham-Carter | | Liberal | Lord Commissioner of the Treasury |
| Devonport | 22 May 1866 | William Ferrand | | Conservative | Lord Eliot | | Liberal | Void election |
| Devonport | 22 May 1866 | John Fleming | | Conservative | Montague Chambers | | Liberal | Void election |
| Kildare | 21 May 1866 | Lord Otho FitzGerald | | Liberal | Lord Otho FitzGerald | | Liberal | Treasurer of the Household |
| Aberdeenshire | 15 May 1866 | William Leslie | | Conservative | William Dingwall Fordyce | | Liberal | Resignation |
| Nottingham | 11 May 1866 | Robert Juckes Clifton | | Liberal | Ralph Bernal Osborne | | Liberal | Void election |
| Nottingham | 11 May 1866 | Samuel Morley | | Liberal | Viscount Amberley | | Liberal | Void election |
| Northallerton | 10 May 1866 | Charles Mills | | Conservative | Egremont Lascelles | | Conservative | Void election |
| North Devon | 9 May 1866 | Charles Trefusis | | Conservative | Stafford Northcote | | Conservative | Succession to a peerage |
| Windsor | 9 May 1866 | Sir Henry Hoare | | Liberal | Charles Edwards | | Liberal | Void election |
| Windsor | 9 May 1866 | Henry Labouchère | | Liberal | Roger Eykyn | | Liberal | Void election |
| Stamford | 8 May 1866 | Stafford Northcote | | Conservative | Sir John Dalrymple-Hay | | Conservative | Resignation to Contest North Devon |
| Sandwich | 8 May 1866 | Lord Clarence Paget | | Liberal | Charles Capper | | Conservative | Resignation |
| Reading | 5 May 1866 | George Shaw-Lefevre | | Liberal | George Shaw-Lefevre | | Liberal | Civil Lord of the Admiralty |
| Helston | 1 May 1866 | Adolphus William Young | | Liberal | Robert Campbell | | Liberal | Void election |
| Helston | 1 May 1866 | Robert Campbell | | Liberal | William Brett | | Conservative | By-election result reversed on petition |
| Cambridge | 24 April 1866 | William Forsyth | | Conservative | John Eldon Gorst | | Conservative | Void election |
| Ripon | 28 March 1866 | Lord John Hay | | Liberal | Lord John Hay | | Liberal | Fifth Naval Lord |
| Honiton | 28 March 1866 | Frederick Goldsmid | | Liberal | Julian Goldsmid | | Liberal | Death |
| Wigan | 27 March 1866 | James Alexander Lindsay | | Conservative | Nathaniel Eckersley | | Conservative | Resignation |
| Western Worcestershire | 24 March 1866 | Frederick Lygon | | Conservative | William Edward Dowdeswell | | Conservative | Succession to a peerage |
| County Louth | 22 March 1866 | Chichester Parkinson-Fortescue | | Liberal | Chichester Parkinson-Fortescue | | Liberal | Chief Secretary for Ireland |
| Tewkesbury | 20 March 1866 | William Edward Dowdeswell | | Conservative | Sir Edmund Lechmere | | Conservative | Resignation to contest Western Worcestershire |
| Kerry | 16 March 1866 | Henry Arthur Herbert | | Liberal | Henry Arthur Herbert | | Liberal | Death |
| Richmond | 6 March 1866 | John Dundas | | Liberal | Marmaduke Wyvill | | Liberal | Death |
| County Limerick | 1 March 1866 | William Monsell | | Liberal | William Monsell | | Liberal | Vice-President of the Board of Trade and Paymaster General |
| North Lancashire | 28 February 1866 | Marquess of Hartington | | Liberal | Marquess of Hartington | | Liberal | Secretary of State for War |
| Tiverton | 28 February 1866 | The Viscount Palmerston | | Liberal | George Denman | | Liberal | Death |
| Sunderland | 28 February 1866 | Henry Fenwick | | Liberal | John Candlish | | Liberal | Civil Lord of the Admiralty |
| Brecon | 27 February 1866 | John Lloyd Vaughan Watkins | | Liberal | Earl of Brecknock | | Liberal | Death |
| Ripon | 26 February 1866 | Sir Charles Wood | | Liberal | Lord John Hay | | Liberal | Resignation pending elevation to the peerage |
| Leominster | 26 February 1866 | Gathorne Hardy | | Conservative | Richard Arkwright | | Conservative | Double election, chose to sit for Oxford University |
| City of London | 26 February 1866 | George Joachim Goschen | | Liberal | George Joachim Goschen | | Liberal | Chancellor of the Duchy of Lancaster |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 An uncontested by-election. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Seat vacated on appointment to the office noted. ↑ Both Robert Campbell and William Brett polled exactly the same number of votes. The mayor, as returning officer, gave his casting vote for the Liberal candidate Robert Campbell. As this vote was given after four o'clock, however, an appeal was lodged, and the House of Commons declared that the returning officer had no right to a casting vote, and that he should have returned the names of both tied candidates. On scrutiny of the votes, one vote was struck off Campbell's total, and the Conservative candidate William Brett declared duly elected. 18th Parliament (1859–1865) ||||||||||
| By-election | Date | Former incumbent | Party | Party | Winner | Party | Party | Cause |
| Devonport | 22 June 1865 | Arthur William Buller | | Liberal | Thomas Brassey | | Liberal | Resignation to contest Liskeard |
| Liskeard | 21 June 1865 | Ralph Bernal Osborne | | Liberal | Arthur William Buller | | Liberal | Resignation |
| Coventry | 21 June 1865 | Joseph Paxton | | Liberal | Henry Eaton | | Conservative | Death |
| Lambeth | 9 May 1865 | William Williams | | Liberal | James Lawrence | | Liberal | Death |
| Clackmannanshire and Kinross-shire | 20 April 1865 | William Patrick Adam | | Liberal | William Patrick Adam | | Liberal | Lord of the Treasury |
| Wigtown Burghs | 15 April 1865 | William Dunbar | | Liberal | George Young | | Liberal | Resignation (Commissioner for Auditing the Public Accounts) |
| Rochdale | 15 April 1865 | Richard Cobden | | Liberal | Thomas Bayley Potter | | Liberal | Death |
| Louth | 15 April 1865 | Richard Montesquieu Bellew | | Liberal | Tristram Kennedy | | Liberal | Resignation (Commissioner of Poor Laws in Ireland) |
| South Shropshire | 12 April 1865 | Viscount Newport | | Conservative | Percy Egerton Herbert | | Conservative | Succession to a peerage |
| Evesham | 4 April 1865 | Henry Willoughby | | Conservative | James Bourne | | Conservative | Death |
| North Devon | 1 April 1865 | James Wentworth Buller | | Liberal | Thomas Dyke Acland | | Liberal | Death |
| North Wiltshire | 20 March 1865 | Thomas H. Sotheron-Estcourt | | Conservative | Lord Charles Bruce | | Liberal | Resignation |
| Tipperary | 24 February 1865 | Daniel O'Donoghue | | Liberal | Charles Moore | | Liberal | Resignation to contest Tralee |
| Lancaster | 20 February 1865 | Samuel Gregson | | Liberal | Henry Schneider | | Liberal | Death |
| Truro | 14 February 1865 | Montague Edward Smith | | Conservative | Frederick Williams | | Conservative | Resignation (Judge of the Court of Common Pleas) |
| Tralee | 14 February 1865 | Thomas O'Hagan | | Liberal | Daniel O'Donoghue | | Liberal | Resignation (Judge of the Court of Common Pleas in Ireland) |
| Cork City | 14 February 1865 | Francis Lyons | | Liberal | Nicholas Daniel Murphy | | Liberal | Resignation |
| Salford | 13 February 1865 | William Nathaniel Massey | | Liberal | John Cheetham | | Liberal | Resignation (Council of India) |
| Buteshire | 6 February 1865 | David Mure | | Conservative | George Boyle | | Conservative | Resignation (Senator of the College of Justice) |
| North Warwickshire | 13 December 1864 | Richard Spooner | | Conservative | William Bromley-Davenport | | Conservative | Death |
| West Suffolk | 8 December 1864 | Earl Jermyn | | Conservative | Lord Augustus Hervey | | Conservative | Succession to a peerage |
| Carmarthen Boroughs | 31 October 1864 | David Morris | | Liberal | William Morris | | Liberal | Death |
| Hastings | 6 October 1864 | Lord Harry George Vane | | Liberal | George Waldegrave-Leslie | | Liberal | Succession to a peerage |
| Exeter | 4 August 1864 | Edward Divett | | Liberal | Lord Courtenay | | Conservative | Death |
| East Gloucestershire | 12 July 1864 | Christopher William Codrington | | Conservative | Michael Hicks Beach | | Conservative | Death |
| North Durham | 28 June 1864 | Lord Adolphus Vane-Tempest | | Conservative | Hedworth Williamson | | Liberal | Death |
| Gloucester | 25 May 1864 | John Joseph Powell | | Liberal | John Joseph Powell | | Liberal | Recorder of Wolverhampton |
| Stockport | 9 May 1864 | James Kershaw | | Liberal | Edward Watkin | | Liberal | Death |
| Merthyr Tydfil | 25 April 1864 | Henry Austin Bruce | | Liberal | Henry Austin Bruce | | Liberal | Vice-President of the Committee on Education |
| Pontefract | 20 April 1864 | Hugh Childers | | Liberal | Hugh Childers | | Liberal | Civil Lord of the Admiralty |
| Fife | 19 April 1864 | James Hay Erskine Wemyss | | Liberal | Robert Anstruther | | Liberal | Death |
| Devizes | 18 April 1864 | William Addington | | Conservative | Thomas Bateson | | Conservative | Succession to a peerage |
| Lancaster | 13 April 1864 | William James Garnett | | Conservative | Edward Matthew Fenwick | | Liberal | Resignation |
| Oxford | 9 April 1864 | Edward Cardwell | | Liberal | Edward Cardwell | | Liberal | Secretary of State for the Colonies |
| County Armagh | 23 March 1864 | Maxwell Charles Close | | Conservative | James Stronge | | Conservative | Resignation |
| Hertfordshire | 14 March 1864 | Christopher William Puller | | Liberal | Henry Surtees | | Conservative | Death |
| Dorset | 27 February 1864 | Henry Ker Seymer | | Conservative | John Floyer | | Conservative | Resignation |
| Brighton | 16 February 1864 | William Coningham | | Liberal | Henry Moor | | Conservative | Resignation |
| Winchester | 10 February 1864 | James Buller East | | Conservative | Thomas Willis Fleming | | Conservative | Resignation |
| Tewkesbury | 9 February 1864 | Frederick Lygon | | Conservative | John Yorke | | Conservative | Resignation to contest West Worcestershire. |
| Durham City | 9 February 1864 | William Atherton | | Liberal | John Henderson | | Liberal | Death |
| Buckinghamshire | 29 December 1863 | William George Cavendish | | Liberal | Robert Bateson Harvey | | Conservative | Succession to a peerage |
| Andover | 18 November 1863 | William Cubitt | | Conservative | William Humphery | | Conservative | Death |
| Oxford | 7 November 1863 | James Haughton Langston | | Liberal | Charles Neate | | Liberal | Death |
| Windsor | 4 November 1863 | George William Hope | | Conservative | Richard Henry Howard Vyse | | Conservative | Death |
| West Worcestershire | 26 October 1863 | Viscount Elmley | | Conservative | Frederick Lygon | | Conservative | Succession to a peerage |
| Barnstaple | 20 October 1863 | George Potts | | Liberal | Thomas Lloyd | | Liberal | Death |
| Barnstaple | 20 October 1863 | Thomas Lloyd | | Liberal | Richard Bremridge | | Conservative | By-election result reversed on petition |
| Richmond | 17 October 1863 | Roundell Palmer | | Liberal | Roundell Palmer | | Liberal | Attorney General for England and Wales |
| Reading | 17 October 1863 | Gillery Pigott | | Liberal | George Shaw-Lefevre | | Liberal | Resignation (Baron of the Court of the Exchequer) |
| Plymouth | 17 October 1863 | Robert Collier | | Liberal | Robert Collier | | Liberal | Solicitor General for England and Wales |
| Tamworth | 12 October 1863 | Viscount Raynham | | Liberal | John Peel | | Conservative | Succession to a peerage |
| Coventry | 8 October 1863 | Edward Ellice | | Liberal | Morgan Treherne | | Conservative | Death |
| Ludlow | 28 August 1863 | Beriah Botfield | | Conservative | William Fraser | | Conservative | Death |
| Montgomery Boroughs | 20 August 1863 | John Willes-Johnson | | Conservative | Charles Hanbury-Tracy | | Liberal | Death |
| Pontefract | 3 August 1863 | Richard Monckton Milnes | | Liberal | Samuel Waterhouse | | Conservative | Elevation to the peerage |
| Clare | 3 August 1863 | Francis Macnamara Calcutt | | Liberal | Colman O'Loghlen | | Liberal | Death |
| Berwick-upon-Tweed | 29 June 1863 | Charles William Gordon | | Conservative | William Walter Cargill | | Conservative | Death |
| Lisburn | 26 June 1863 | John Doherty Barbour | | Liberal | Edward Wingfield Verner | | Conservative | Void By-election |
| New Ross | 8 June 1863 | Charles Tottenham (II) | | Conservative | Charles George Tottenham | | Conservative | Resignation |
| Kinsale | 8 June 1863 | John Arnott | | Liberal | George Conway Colthurst | | Independent Liberal (Liberal-Conservative) | Resignation |
| City of London | 2 June 1863 | Western Wood | | Liberal | George Joachim Goschen | | Liberal | Death |
| Tralee | 15 May 1863 | Daniel O'Connell Jnr | | Liberal | Thomas O'Hagan | | Liberal | Resignation |
| Antrim | 6 May 1863 | George Upton | | Conservative | Edward O'Neill | | Conservative | Succession to an Irish peerage |
| Halifax | 28 April 1863 | James Stansfeld | | Liberal | James Stansfeld | | Liberal | Civil Lord of the Admiralty |
| Radnor Boroughs | 25 April 1863 | George Cornewall Lewis | | Liberal | Richard Green-Price | | Liberal | Death |
| Dublin County | 22 April 1863 | James Hans Hamilton | | Conservative | Ion Hamilton | | Conservative | Resignation |
| Thetford | 21 April 1863 | Earl of Euston | | Liberal | Lord Frederick FitzRoy | | Liberal | Succession to a peerage |
| North Lancashire | 24 March 1863 | Marquess of Hartington | | Liberal | Marquess of Hartington | | Liberal | Civil Lord of the Admiralty |
| Bandon | 27 February 1863 | William Smyth Bernard | | Conservative | Henry Boyle Bernard | | Conservative | Death |
| Lisburn | 23 February 1863 | Jonathan Joseph Richardson | | Conservative | John Doherty Barbour | | Liberal | Resignation |
| Chichester | 21 February 1863 | Humphrey William Freeland | | Liberal | John Abel Smith | | Liberal | Resignation |
| Devizes | 18 February 1863 | John Neilson Gladstone | | Conservative | William Addington | | Conservative | Death |
| West Somerset | 17 February 1863 | Charles Moody | | Conservative | William Gore-Langton | | Conservative | Resignation |
| Cambridgeshire | 14 February 1863 | Edward Ball | | Conservative | Lord George Manners | | Conservative | Resignation |
| Devonport | 12 February 1863 | Michael Seymour | | Liberal | William Ferrand | | Conservative | Resignation |
| Cambridge | 12 February 1863 | Andrew Steuart | | Conservative | Francis Powell | | Conservative | Resignation |
| Reigate | 6 February 1863 | William John Monson | | Liberal | Granville William Gresham Leveson-Gower | | Liberal | Succession to a peerage |
| Totnes | 20 January 1863 | George Hay | | Liberal | Alfred Seymour | | Liberal | Death |
| East Kent | 5 January 1863 | William Deedes | | Conservative | Edward Dering | | Liberal | Death |
| Andover | 17 December 1862 | Henry Beaumont Coles | | Conservative | William Cubitt | | Conservative | Death |
| Totnes | 9 December 1862 | Thomas Mills | | Liberal | John Pender | | Liberal | Death |
| Southampton | 6 December 1862 | Brodie McGhie Willcox | | Liberal | William Anderson Rose | | Conservative | Death |
| Stoke-upon-Trent | 23 September 1862 | John Lewis Ricardo | | Liberal | Henry Grenfell | | Liberal | Death |
| County Carlow | 7 August 1862 | William McClintock-Bunbury | | Conservative | Denis Pack-Beresford | | Conservative | Resignation |
| Kirkcaldy Burghs | 25 July 1862 | Robert Ferguson | | Liberal | Roger Sinclair Aytoun | | Liberal | Resignation |
| Montgomeryshire | 14 July 1862 | Herbert Watkin Williams-Wynn | | Conservative | Charles Watkin Williams-Wynn | | Conservative | Death |
| Shrewsbury | 2 June 1862 | Robert Aglionby Slaney | | Liberal | Henry Robertson | | Liberal | Death |
| Kidderminster | 27 May 1862 | Alfred Rhodes Bristow | | Liberal | Luke White | | Liberal | Resignation |
| Oldham | 5 May 1862 | William Johnson Fox | | Liberal | John Tomlinson Hibbert | | Liberal | Resignation |
| Lambeth | 5 May 1862 | William Roupell | | Liberal | Frederick Doulton | | Liberal | Resignation |
| Preston | 4 April 1862 | Richard Assheton Cross | | Conservative | Thomas Hesketh | | Conservative | Resignation |
| Wycombe | 18 March 1862 | George Dashwood | | Liberal | John Remington Mills | | Liberal | Death |
| North Riding of Yorkshire | 17 March 1862 | Edward Stillingfleet Cayley | | Liberal | William Morritt | | Conservative | Death |
| Longford | 7 March 1862 | Luke White | | Liberal | Myles William O'Reilly | | Liberal | Lord of the Treasury |
| Canterbury | 6 March 1862 | Henry Butler-Johnstone | | Conservative | Henry Munro-Butler-Johnstone | | Conservative | Resignation |
| Wakefield | 28 February 1862 | William Henry Leatham | | Liberal | John Charles Dalrymple Hay | | Conservative | Void election |
| Gloucester | 26 February 1862 | Charles James Monk | | Liberal | Charles Berkeley | | Liberal | Void election |
| Gloucester | 26 February 1862 | William Philip Price | | Liberal | John Joseph Powell | | Liberal | Void election |
| Leicester | 17 February 1862 | John Biggs | | Liberal | Peter Alfred Taylor | | Liberal | Resignation |
| Great Grimsby | 14 February 1862 | Lord Worsley | | Liberal | John Chapman | | Conservative | Succession to a peerage |
| Lincoln | 12 February 1862 | George Heneage | | Liberal | John Bramley-Moore | | Conservative | Resignation to contest Great Grimsby |
| New Shoreham | 5 February 1862 | Charles Burrell | | Conservative | Percy Burrell | | Conservative | Death |
| Oxfordshire | 3 February 1862 | George Harcourt | | Liberal | John Fane | | Conservative | Death |
| Coleraine | 31 January 1862 | John Boyd | | Conservative | Henry Bruce | | Conservative | Death |
| Nottingham | 26 December 1861 | John Mellor | | Liberal | Robert Juckes Clifton | | Liberal | Resignation (Justice of the Court of the King's Bench) |
| East Worcestershire | 20 December 1861 | John Hodgetts-Foley | | Liberal | Harry Vernon | | Liberal | Death |
| Finsbury | 17 December 1861 | Thomas Slingsby Duncombe | | Liberal | William Cox | | Liberal | Death |
| Birkenhead | 11 December 1861 | N/A | | N/A | John Laird | | Conservative | Birkenhead enfranchised |
| Carlisle | 26 November 1861 | James Graham | | Liberal | Edmund Potter | | Liberal | Death |
| Lincoln | 9 November 1861 | Gervaise Tottenham Waldo Sibthorp | | Conservative | Charles Seely | | Liberal | Death |
| Plymouth | 31 October 1861 | Viscount Valletort | | Conservative | Walter Morrison | | Liberal | Succession to a peerage |
| South Lancashire | 19 August 1861 | N/A | | N/A | Charles Turner | | Conservative | South Lancashire granted a third seat |
| Selkirkshire | 1 August 1861 | Allen Eliott-Lockhart | | Conservative | Lord Henry Scott | | Conservative | Resignation |
| Tamworth | 31 July 1861 | Robert Peel | | Liberal | Robert Peel | | Liberal | Chief Secretary for Ireland |
| Morpeth | 31 July 1861 | George Grey | | Liberal | George Grey | | Liberal | Home Secretary |
| Oxford | 30 July 1861 | Edward Cardwell | | Liberal | Edward Cardwell | | Liberal | Chancellor of the Duchy of Lancaster |
| City of London | 29 July 1861 | Lord John Russell | | Liberal | Western Wood | | Liberal | Resignation (elevated to the peerage) |
| Andover | 29 July 1861 | William Cubitt | | Conservative | Henry Beaumont Coles | | Conservative | Resignation to contest City of London |
| Richmond | 9 July 1861 | Henry Rich | | Liberal | Roundell Palmer | | Liberal | Resignation |
| Durham City | 8 July 1861 | William Atherton | | Liberal | William Atherton | | Liberal | Attorney General for England and Wales |
| Longford | 4 July 1861 | Henry White | | Liberal | Luke White | | Liberal | Resignation |
| Wolverhampton | 3 July 1861 | Sir Richard Bethell | | Liberal | Thomas Matthias Weguelin | | Liberal | Hereditary Peerage on appointment as Lord High Chancellor of Great Britain |
| Southwark | 30 May 1861 | Thomas Lloyd-Mostyn | | Liberal | Lord Richard Grosvenor | | Liberal | Death |
| Montgomery Boroughs | 4 May 1861 | David Pugh | | Conservative | John Willes-Johnson | | Conservative | Death |
| Banffshire | 1 May 1861 | Lachlan Gordon-Duff | | Liberal | Robert William Duff | | Liberal | Resignation |
| Southwark | 24 April 1861 | John Locke | | Liberal | John Locke | | Liberal | Recorder of Brighton |
| Tynemouth and North Shields | 23 April 1861 | Hugh Taylor | | Conservative | Richard Hodgson | | Conservative | Resignation |
| Marylebone | 19 April 1861 | Edwin James | | Liberal | John Harvey Lewis | | Liberal | Resignation |
| Tiverton | 28 March 1861 | The Viscount Palmerston | | Liberal | The Viscount Palmerston | | Liberal | Lord Warden of the Cinque Ports |
| Sutherland | 27 March 1861 | Marquess of Stafford | | Liberal | David Dundas | | Liberal | Succession to a peerage |
| County Cork | 28 February 1861 | Rickard Deasy | | Liberal | Nicholas Leader | | Conservative | Resignation (Baron of the Exchequer in Ireland) |
| Pembroke Boroughs | 22 February 1861 | Sir John Owen | | Liberal | Sir Hugh Owen | | Liberal | Death |
| South Wiltshire | 14 February 1861 | Sidney Herbert | | Liberal | Frederick Hervey-Bathurst | | Conservative | Elevation to the peerage |
| Aberdeenshire | 13 February 1861 | Lord Haddo | | Liberal | Walter Barttelot | | Conservative | Succession to a peerage |
| Bradford | 11 February 1861 | Titus Salt | | Liberal | William Edward Forster | | Liberal | Resignation |
| Bolton | 11 February 1861 | Joseph Crook | | Liberal | Thomas Barnes | | Liberal | Resignation |
| Leicester | 7 February 1861 | Joseph William Noble | | Liberal | William Unwin Heygate | | Conservative | Death |
| Pembrokeshire | 19 January 1861 | Viscount Emlyn | | Conservative | George Lort Phillips | | Conservative | Succession to a peerage |
| West Sussex | 27 December 1860 | Earl of March | | Conservative | Walter Barttelot | | Conservative | Succession to a peerage |
| Ripon | 22 December 1860 | John Ashley Warre | | Liberal | Reginald Vyner | | Liberal | Death |
| South Nottinghamshire | 18 December 1860 | Viscount Newark | | Conservative | Lord Stanhope | | Conservative | Succession to a peerage |
| Southwark | 12 December 1860 | Charles Napier | | Liberal | Austen Henry Layard | | Liberal | Death |
| Newcastle-upon-Tyne | 7 December 1860 | George Ridley | | Liberal | Somerset Beaumont | | Liberal | Resignation (Inclosure Commissioner) |
| Wick Burghs | 1 December 1860 | Samuel Laing | | Liberal | Viscount Bury | | Liberal | Resignation (Council of India) |
| Reading | 21 November 1860 | Francis Pigott | | Liberal | Gillery Pigott | | Liberal | Resignation (Lieutenant Governor of the Isle of Man) |
| Dartmouth | 3 November 1860 | John Dunn | | Conservative | John Hardy | | Conservative | Death |
| Boston | 30 October 1860 | Herbert Ingram | | Liberal | John Malcolm | | Conservative | Death |
| Honiton | 22 October 1860 | Joseph Locke | | Liberal | George Moffatt | | Liberal | Death |
| Ludlow | 4 September 1860 | Percy Egerton Herbert | | Conservative | George Windsor-Clive | | Conservative | Resignation |
| West Cumberland | 27 August 1860 | Henry Wyndham | | Conservative | Percy Wyndham | | Conservative | Death |
| Sligo Borough | 9 August 1860 | John Arthur Wynne | | Conservative | Francis Macdonogh | | Conservative | Resignation |
| Stafford | 3 August 1860 | John Ayshford Wise | | Liberal | Thomas Sidney | | Liberal | Resignation |
| Donegal | 17 July 1860 | Edmund Hayes | | Conservative | Viscount Hamilton | | Conservative | Death |
| Brighton | 16 July 1860 | George Brooke-Pechell | | Liberal | James White | | Liberal | Death |
| Belfast | 15 June 1860 | Richard Davison | | Conservative | Samuel Gibson Getty | | Conservative | Resignation |
| Lymington | 24 May 1860 | Sir John Rivett-Carnac | | Conservative | Lord George Gordon-Lennox | | Conservative | Resignation |
| Berkshire | 2 May 1860 | Leicester Viney Vernon | | Conservative | Richard Benyon | | Conservative | Death |
| Harwich | 24 April 1860 | William Campbell | | Liberal | Richard Rowley | | Conservative | Succession to a peerage |
| Clare | 13 April 1860 | Luke White | | Liberal | Francis Macnamara Calcutt | | Liberal | Void election |
| Londonderry City | 2 April 1860 | Robert Ferguson | | Liberal | William McCormick | | Conservative | Death |
| Norwich | 28 March 1860 | Viscount Bury | | Liberal | William Russell | | Liberal | Void election |
| Norwich | 28 March 1860 | Henry William Schneider | | Liberal | Edward Warner | | Liberal | Void election |
| Roscommon | 26 March 1860 | Thomas William Goff | | Conservative | Charles Owen O'Conor | | Liberal | Void election |
| Worcester | 12 March 1860 | William Laslett | | Liberal | Richard Padmore | | Liberal | Resignation |
| West Surrey | 10 March 1860 | Henry Drummond | | Conservative | George Cubitt | | Conservative | Death |
| County Cork | 5 March 1860 | Rickard Deasy | | Liberal | Rickard Deasy | | Liberal | Attorney General for Ireland |
| Ennis | 20 February 1860 | John FitzGerald | | Liberal | William Stacpoole | | Liberal | Resignation (Judge of the Court of the Queen's Bench in Ireland) |
| Hertford | 13 February 1860 | William Cowper | | Liberal | William Cowper | | Liberal | First Commissioner of Works |
| Gateshead | 13 February 1860 | William Hutt | | Liberal | William Hutt | | Liberal | Vice-President of the Board of Trade and Paymaster General |
| Forfarshire | 1 February 1860 | Viscount Duncan | | Liberal | Charles Carnegie | | Liberal | Succession to a peerage |
| Scarborough | 1 February 1860 | William Denison | | Liberal | John Dent Dent | | Liberal | Succession to a peerage |
| Pontefract | 31 January 1860 | William Overend | | Conservative | Hugh Childers | | Liberal | Resignation (arbitrator recommended resignation after contested election) |
| Beverly | 31 January 1860 | Ralph Walters | | Liberal | James Walker | | Conservative | Void election |
| Lewes | 16 January 1860 | Henry Fitzroy | | Liberal | John Blencowe | | Liberal | Death |
| Reading | 11 January 1860 | Henry Singer Keating | | Liberal | Francis Goldsmid | | Liberal | Resignation (Justice of the Court of Common Pleas) |
| Liskeard | 9 January 1860 | William Atherton | | Liberal | William Atherton | | Liberal | Solicitor General for England and Wales |
| Whitby | 23 November 1859 | Robert Stephenson | | Conservative | Harry Stephen Thompson | | Liberal | Death |
| Ayrshire | 31 October 1859 | Lord Patrick Crichton-Stuart | | Liberal | James Fergusson | | Conservative | Death |
| South Shropshire | 14 September 1859 | Robert Windsor-Clive | | Conservative | Baldwin Leighton | | Conservative | Death |
| Kingston upon Hull | 20 August 1859 | Joseph Hoare | | Conservative | Joseph Somes | | Conservative | Void election |
| Berwick-upon-Tweed | 20 August 1859 | Ralph Anstruther Earle | | Conservative | Dudley Marjoribanks | | Liberal | Resignation (in exchange for withdrawal of election petition) |
| Liskeard | 18 August 1859 | Ralph Grey | | Liberal | Ralph Bernal Osborne | | Liberal | Resignation |
| Hertford | 18 August 1859 | William Cowper | | Liberal | William Cowper | | Liberal | Vice-President of the Board of Trade and Paymaster General |
| Devonport | 17 August 1859 | James Wilson | | Liberal | Arthur William Buller | | Liberal | Resignation |
| Bodmin | 13 August 1859 | William Michell | | Conservative | James Wyld | | Liberal | Resignation (in exchange for withdrawal of election petition) |
| Taunton | 9 August 1859 | Henry Labouchere | | Liberal | George Cavendish-Bentinck | | Conservative | Resignation (Elevation to the peerage) |
| Devonport | 9 August 1859 | Thomas Erskine Perry | | Liberal | Michael Seymour | | Liberal | Resignation (Council of India) |
| Dartmouth | 8 August 1859 | Edward Wyndham Harrington Schenley | | Liberal | John Dunn | | Conservative | Void election |
| Wicklow | 18 July 1859 | Lord Proby | | Liberal | Lord Proby | | Liberal | Comptroller of the Household |
| Wolverhampton | 9 July 1859 | Charles Pelham Villiers | | Liberal | Charles Pelham Villiers | | Liberal | President of the Poor Law Board |
| Ashton-under-Lyne | 9 July 1859 | Thomas Milner Gibson | | Liberal | Thomas Milner Gibson | | Liberal | President of the Board of Trade |
| Marylebone | 7 July 1859 | Benjamin Hall | | Liberal | Edmond Roche | | Liberal | Elevation to the peerage |
| West Gloucestershire | 7 July 1859 | Robert Kingscote | | Liberal | Robert Kingscote | | Liberal | Groom in Waiting |
| Lichfield | 6 July 1859 | Lord Alfred Paget | | Liberal | Lord Alfred Paget | | Liberal | Chief Equerry and Clerk Marshal |
| Northampton | 5 July 1859 | Robert Vernon Smith | | Liberal | The Lord Henley | | Liberal | Elevation to the peerage |
| Kerry | 5 July 1859 | Viscount Castlerosse | | Liberal | Viscount Castlerosse | | Liberal | Vice-Chamberlain of the Household |
| County Cork | 5 July 1859 | Rickard Deasy | | Liberal | Rickard Deasy | | Liberal | Solicitor General for Ireland |
| Oxford University | 1 July 1859 | William Ewart Gladstone | | Peelite | William Ewart Gladstone | | Liberal | Chancellor of the Exchequer |
| Monmouthshire | 1 July 1859 | Edward Arthur Somerset | | Conservative | Poulett Somerset | | Conservative | Resignation |
| Clonmel | 1 July 1859 | John Bagwell | | Liberal | John Bagwell | | Liberal | Lord Commissioner of the Treasury |
| Ennis | 29 June 1859 | John FitzGerald | | Liberal | John FitzGerald | | Liberal | Attorney General for Ireland |
| Cork | 29 June 1859 | William Trant Fagan | | Liberal | Francis Lyons | | Liberal | Death |
| South Wiltshire | 29 June 1859 | Sidney Herbert | | Liberal | Sidney Herbert | | Liberal | Secretary of State for War and Secretary at War |
| Edinburgh | 28 June 1859 | James Moncreiff | | Liberal | James Moncreiff | | Liberal | Lord Advocate |
| Sandwich | 28 June 1859 | Edward Knatchbull-Hugessen | | Liberal | Edward Knatchbull-Hugessen | | Liberal | Lord Commissioner of the Treasury |
| Norwich | 28 June 1859 | Viscount Bury | | Liberal | Viscount Bury | | Liberal | Treasurer of the Household |
| Newcastle upon Tyne | 28 June 1859 | Thomas Emerson Headlam | | Liberal | Thomas Emerson Headlam | | Liberal | Judge Advocate General |
| Halifax | 28 June 1859 | Charles Wood | | Liberal | Charles Wood | | Liberal | Secretary of State for India |
| Bedford | 28 June 1859 | Samuel Whitbread | | Liberal | Samuel Whitbread | | Liberal | Civil Lord of the Admiralty |
| Wigtown Burghs | 27 June 1859 | William Dunbar | | Liberal | William Dunbar | | Liberal | Lord Commissioner of the Treasury |
| Radnor Boroughs | 27 June 1859 | George Cornewall Lewis | | Liberal | George Cornewall Lewis | | Liberal | Home Secretary |
| Wolverhampton | 27 June 1859 | Richard Bethell | | Liberal | Richard Bethell | | Liberal | Attorney General for England and Wales |
| Tiverton | 27 June 1859 | The Viscount Palmerston | | Liberal | The Viscount Palmerston | | Liberal | Prime Minister and First Lord of the Treasury |
| Reading | 27 June 1859 | Henry Singer Keating | | Liberal | Henry Singer Keating | | Liberal | Solicitor General for England and Wales |
| Oxford | 27 June 1859 | Edward Cardwell | | Liberal | Edward Cardwell | | Liberal | Chief Secretary for Ireland |
| Morpeth | 27 June 1859 | George Grey | | Liberal | George Grey | | Liberal | Chancellor of the Duchy of Lancaster |
| Lewes | 27 June 1859 | Henry Fitzroy | | Liberal | Henry Fitzroy | | Liberal | First Commissioner of Works |
| Devonport | 27 June 1859 | James Wilson | | Liberal | James Wilson | | Liberal | Vice-President of the Board of Trade and Paymaster General |
| Calne | 27 June 1859 | Robert Lowe | | Liberal | Robert Lowe | | Liberal | Vice-President of the Committee of the Council on Education |
| Ashton-under-Lyne | 27 June 1859 | Thomas Milner Gibson | | Liberal | Thomas Milner Gibson | | Liberal | President of the Poor Law Board |
| City of London | 27 June 1859 | Lord John Russell | | Liberal | Lord John Russell | | Liberal | Foreign Secretary |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 An uncontested by-election. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Seat vacated on appointment to the office noted. ↑ According to the writ of election the by-election cause was Castlerosse being appointed Treasurer of the Household. However according to the London Gazette he does not appear to have actually been appointed to that office but was instead appointed Vice-Chamberlain of the Household. ↑ According to the writ of election the by-election cause was Bury being appointed Comptroller of the Household. However according to the London Gazette he does not appear to have actually been appointed to that office but was instead appointed Treasurer of the Household. 17th Parliament (1857–1859) ||||||||||
| By-election | Date | Former incumbent | Party | Party | Winner | Party | Party | Cause |
| Harwich | 18 March 1859 | John Bagshaw | | Whig | Henry Jervis-White-Jervis | | Conservative | Resignation |
| Stirlingshire | 14 March 1859 | Peter Blackburn | | Conservative | Peter Blackburn | | Conservative | Junior Lord of the Treasury |
| North Northumberland | 10 March 1859 | Lord Lovaine | | Conservative | Lord Lovaine | | Conservative | Vice-President of the Board of Trade and Paymaster General |
| West Sussex | 9 March 1859 | Earl of March | | Conservative | Earl of March | | Conservative | President of the Poor Law Board |
| North Wiltshire | 8 March 1859 | Thomas H. Sotheron-Estcourt | | Conservative | Thomas H. Sotheron-Estcourt | | Conservative | Home Secretary |
| Tewkesbury | 8 March 1859 | Frederick Lygon | | Conservative | Frederick Lygon | | Conservative | Civil Lord of the Admiralty |
| Bury St. Edmunds | 7 March 1859 | Earl Jermyn | | Conservative | Lord Alfred Hervey | | Conservative | Succession to a peerage |
| Midhurst | 3 March 1859 | Samuel Warren | | Conservative | John Hardy | | Conservative | Resignation |
| Marylebone | 25 February 1859 | Viscount Ebrington | | Whig | Edwin James | | Whig | Resignation and elevation to the House of Lords through a Writ of acceleration |
| East Worcestershire | 24 February 1859 | George Rushout | | Conservative | Frederick Gough-Calthorpe | | Whig | Succession to a peerage |
| West Riding of Yorkshire | 21 February 1859 | Viscount Goderich | | Whig | John Ramsden | | Whig | Succession to a peerage |
| Enniskillen | 21 February 1859 | James Whiteside | | Conservative | John Lowry Cole | | Conservative | Resignation in order to contest Dublin University |
| Greenwich | 16 February 1859 | John Townsend | | Whig | David Salomons | | Whig | Resignation |
| Hythe | 15 February 1859 | John Ramsden | | Whig | Mayer Amschel de Rothschild | | Whig | Resignation in order to contest the West Riding of Yorkshire |
| Oxford University | 12 February 1859 | William Ewart Gladstone | | Peelite | William Ewart Gladstone | | Peelite | Resignation (Lord High Commissioner of the Ionian Islands) |
| Galway Borough | 11 February 1859 | Anthony O'Flaherty | | Whig | John Orrell Lever | | Conservative | Void election |
| Dublin University | 11 February 1859 | George Alexander Hamilton | | Conservative | James Whiteside | | Conservative | Resignation |
| Banbury | 9 February 1859 | Henry William Tancred | | Whig | Bernhard Samuelson | | Whig | Resignation |
| Linlithgowshire | 5 February 1859 | George Dundas | | Conservative | Charles Baillie | | Conservative | Resignation (Lieutenant Governor of Prince Edward Island) |
| Boston | 3 February 1859 | William Henry Adams | | Conservative | William Henry Adams | | Conservative | Recorder of Derby |
| Breconshire | 28 December 1858 | Joseph Bailey | | Conservative | Godfrey Morgan | | Conservative | Death |
| Herefordshire | 18 December 1858 | Thomas William Booker-Blakemore | | Conservative | Lord Montagu Graham | | Conservative | Death |
| Manchester | 17 November 1858 | John Potter | | Whig | Thomas Bazley | | Whig | Death |
| Reigate | 23 October 1858 | Henry Rawlinson | | Whig | William Monson | | Whig | Resignation (Council of India) |
| Leominster | 22 October 1858 | John Willoughby | | Conservative | Charles Bateman-Hanbury | | Conservative | Resignation (Council of India) |
| Guildford | 22 October 1858 | Ross Donnelly Mangles | | Whig | Guildford Onslow | | Whig | Resignation (Council of India) |
| North Cheshire | 7 August 1858 | William Egerton | | Conservative | Wilbraham Egerton | | Conservative | Resignation |
| South Devon | 6 August 1858 | John Yarde-Buller | | Conservative | Samuel Trehawke Kekewich | | Conservative | Resignation and elevation to the peerage |
| Stamford | 17 July 1858 | John Inglis | | Conservative | Stafford Northcote | | Conservative | Resignation (Lord Justice Clerk) |
| West Cornwall | 5 July 1858 | Michael Williams | | Whig | John St Aubyn | | Whig | Death |
| East Norfolk | 1 July 1858 | Edward Buxton | | Whig | Wenman Coke | | Whig | Death |
| Hertfordshire | 8 June 1858 | Edward Bulwer-Lytton | | Conservative | Edward Bulwer-Lytton | | Conservative | Secretary of State for the Colonies |
| King's Lynn | 5 June 1858 | Lord Stanley | | Conservative | Lord Stanley | | Conservative | President of the Board of Control |
| Limerick City | 21 May 1858 | George Gavin | | Whig | James Spaight | | Conservative | Void By-Election |
| Leitrim | 17 May 1858 | Hugh Lyons-Montgomery | | Conservative | William Ormsby-Gore | | Conservative | Resignation |
| Dublin University | 27 March 1858 | Joseph Napier | | Conservative | Anthony Lefroy | | Conservative | Resignation (Lord Chancellor of Ireland) |
| City Durham | 17 March 1858 | John Mowbray | | Conservative | John Mowbray | | Conservative | Judge Advocate General |
| Tyrone | 11 March 1858 | Lord Claud Hamilton | | Conservative | Lord Claud Hamilton | | Conservative | Treasurer of the Household |
| North Northumberland | 11 March 1858 | Lord Lovaine | | Conservative | Lord Lovaine | | Conservative | Civil Lord of the Admiralty |
| County Dublin | 11 March 1858 | Thomas Edward Taylor | | Conservative | Thomas Edward Taylor | | Conservative | Junior Lord of the Treasury |
| South Shropshire | 9 March 1858 | Viscount Newport | | Conservative | Viscount Newport | | Conservative | Vice-Chamberlain of the Household |
| Enniskillen | 9 March 1858 | James Whiteside | | Conservative | James Whiteside | | Conservative | Attorney-General for Ireland |
| North Staffordshire | 8 March 1858 | Charles Adderley | | Conservative | Charles Adderley | | Conservative | Vice-President of the Committee of the Council on Education and President of the Board of Health |
| North Leicestershire | 8 March 1858 | Lord John Manners | | Conservative | Lord John Manners | | Conservative | First Commissioner of Works |
| Buckinghamshire | 8 March 1858 | Benjamin Disraeli | | Conservative | Benjamin Disraeli | | Conservative | Chancellor of the Exchequer |
| East Suffolk | 6 March 1858 | Fitzroy Kelly | | Conservative | Fitzroy Kelly | | Conservative | Attorney General for England and Wales |
| Oxfordshire | 6 March 1858 | Joseph Warner Henley | | Conservative | Joseph Warner Henley | | Conservative | President of the Board of Trade |
| Chichester | 6 March 1858 | Lord Henry Lennox | | Conservative | Lord Henry Lennox | | Conservative | Junior Lord of the Treasury |
| North Wiltshire | 5 March 1858 | Thomas H. Sotheron-Estcourt | | Conservative | Thomas H. Sotheron-Estcourt | | Conservative | President of the Poor Law Board |
| Belfast | 5 March 1858 | Hugh Cairns | | Conservative | Hugh Cairns | | Conservative | Solicitor General for England and Wales |
| King's Lynn | 4 March 1858 | Lord Stanley | | Conservative | Lord Stanley | | Conservative | Secretary of State for the Colonies |
| Huntingdon | 4 March 1858 | Jonathan Peel | | Conservative | Jonathan Peel | | Conservative | Secretary of State for War and Secretary at War |
| Cambridge University | 4 March 1858 | Spencer Horatio Walpole | | Conservative | Spencer Horatio Walpole | | Conservative | Home Secretary |
| Wenlock | 3 March 1858 | George Weld-Forester | | Conservative | George Weld-Forester | | Conservative | Comptroller of the Household |
| Stamford | 3 March 1858 | Sir Frederic Thesiger | | Conservative | John Inglis | | Conservative | Hereditary Peerage on appointment as Lord High Chancellor of Great Britain |
| Droitwich | 3 March 1858 | Sir John Pakington | | Conservative | Sir John Pakington | | Conservative | First Lord of the Admiralty |
| Cockermouth | 3 March 1858 | Lord Naas | | Conservative | Lord Naas | | Conservative | Chief Secretary for Ireland |
| Bridgnorth | 3 March 1858 | Henry Whitmore | | Conservative | Henry Whitmore | | Conservative | Junior Lord of the Treasury |
| Wicklow | 25 February 1858 | Viscount Milton | | Whig | Lord Proby | | Whig | Succession to a peerage |
| South Northamptonshire | 20 February 1858 | Viscount Althorp | | Whig | Henry Cartwright | | Conservative | Succession to a peerage |
| Limerick City | 15 February 1858 | James O'Brien | | Whig | George Gavin | | Whig | Resignation (Justice of the Court of Queen's Bench in Ireland) |
| Reigate | 6 February 1858 | William Hackblock | | Ind. Whig | Henry Rawlinson | | Whig | Death |
| Mayo | 30 December 1857 | George Henry Moore | | Independent Irish | Lord John Browne | | Whig | Void election |
| Buckinghamshire | 28 December 1857 | Charles Compton Cavendish | | Whig | William George Cavendish | | Whig | Resignation and elevation to the peerage |
| Elgin Burghs | 19 December 1857 | George Skene Duff | | Whig | M. E. Grant Duff | | Whig | Resignation |
| Whitehaven | 17 December 1857 | Robert Charles Hildyard | | Conservative | George Lyall | | Conservative | Death |
| North Northamptonshire | 16 December 1857 | Augustus Stafford | | Conservative | George Ward Hunt | | Conservative | Death |
| Scarborough | 14 December 1857 | Earl of Mulgrave | | Whig | John Dent Dent | | Whig | Resignation |
| Ashton-under-Lyne | 14 December 1857 | Charles Hindley | | Whig | Thomas Milner Gibson | | Whig | Death |
| Paisley | 11 December 1857 | Archibald Hastie | | Whig | Humphrey Crum-Ewing | | Whig | Death |
| East Kent | 10 December 1857 | Sir Edward Dering | | Whig | William Deedes | | Conservative | Resignation |
| Thetford | 9 December 1857 | Francis Baring | | Conservative | Alexander Baring | | Conservative | Resignation |
| Harwich | 9 December 1857 | George Drought Warburton | | Ind. Whig | Robert John Bagshaw | | Whig | Death |
| Oldham | 19 October 1857 | James Platt | | Whig | William Johnson Fox | | Whig | Death |
| Tavistock | 4 September 1857 | George Henry Charles Byng | | Whig | Lord Arthur Russell | | Whig | Resignation to contest Middlesex |
| Middlesex | 3 September 1857 | Lord Robert Grosvenor | | Whig | George Henry Charles Byng | | Whig | Elevation to the peerage |
| Beverley | 11 August 1857 | Edward Auchmuty Glover | | Whig | Henry Edwards | | Conservative | Void election |
| Great Yarmouth | 10 August 1857 | William McCullagh Torrens | | Ind. Whig | Adolphus William Young | | Whig | Void election |
| Great Yarmouth | 10 August 1857 | Edward Watkin | | Whig | John Mellor | | Whig | Void election |
| Birmingham | 10 August 1857 | George Frederic Muntz | | Whig | John Bright | | Whig | Death |
| Falkirk Burghs | 8 August 1857 | James Merry | | Whig | John Glencairn Carter Hamilton | | Whig | Void election |
| City of London | 28 July 1857 | Lionel de Rothschild | | Whig | Lionel de Rothschild | | Whig | Seeks re-election following the rejection of the Jewish Disabilities Bill |
| Woodstock | 24 July 1857 | Marquess of Blandford | | Conservative | Lord Alfred Spencer-Churchill | | Conservative | Succession to a peerage |
| Oxford | 21 July 1857 | Charles Neate | | Whig | Edward Cardwell | | Peelite | Void election |
| Banffshire | 30 June 1857 | The Earl Fife | | Whig | Lachlan Gordon-Duff | | Whig | Resignation |
| Carmarthenshire | 12 June 1857 | David Arthur Saunders Davies | | Conservative | David Pugh | | Conservative | Death |
| Kerry | 9 June 1857 | Henry Arthur Herbert | | Whig | Henry Arthur Herbert | | Whig | Chief Secretary for Ireland |
| Leeds | 5 June 1857 | Robert Hall | | Conservative | George Skirrow Beecroft | | Conservative | Death |
| Reading | 2 June 1857 | Henry Singer Keating | | Whig | Henry Singer Keating | | Whig | Solicitor General for England and Wales |
| Penryn and Falmouth | 27 May 1857 | Thomas George Baring | | Whig | Thomas George Baring | | Whig | Civil Lord of the Admiralty |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 An uncontested by-election. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Seat vacated on appointment to the office noted. ||||||||||