Template:New Zealand by-elections during the 4th Parliament

The following table contains the by-elections that have occurred during the term of the 4th Parliament.

{| class="wikitable" ! By-election !! Electorate !! Date !! Incumbent !! Reason !! Winner
 * - style="text-align:center;"
 * 1866
 * Mount Herbert
 * 27 July
 * William Moorhouse
 * Chose to represent Westland
 * Thomas Potts
 * 1866
 * Port Chalmers
 * 15 December
 * Thomas Dick
 * Resignation
 * Thomas Dick
 * 1867
 * City of Dunedin
 * 19 January
 * William Reynolds
 * Resignation
 * William Reynolds
 * 1867
 * City of Christchurch
 * 13 February
 * James FitzGerald
 * Resignation
 * William Travers
 * 1867
 * Avon
 * 11 March
 * Crosbie Ward
 * Resignation
 * William Reeves
 * 1867
 * City of Auckland West
 * 25 April
 * James Williamson
 * Resignation
 * Patrick Dignan
 * 1867
 * Manuherikia
 * 27 April
 * William Baldwin
 * Resignation
 * David Mervyn
 * 1867
 * Wanganui
 * 27 April
 * John Bryce
 * Resignation
 * Henry Harrison
 * 1867
 * Town of New Plymouth
 * 29 April
 * John Richardson
 * Resignation
 * Harry Atkinson
 * 1867
 * Raglan
 * 4 June
 * Joseph Newman
 * Resignation
 * James Farmer
 * 1867
 * Parnell
 * 5 June
 * Frederick Whitaker
 * Resignation
 * Charles Heaphy
 * 1867
 * Port Chalmers
 * 15 June
 * Thomas Dick
 * Resignation
 * David Main
 * 1867
 * Waimea
 * 28 June
 * Arthur Oliver
 * Resignation
 * Edward Baigent
 * 1867
 * Lyttelton
 * 1 July
 * Edward Hargreaves
 * Resignation
 * George Macfarlan
 * 1867
 * Northern Division
 * 1 July
 * Thomas Henderson
 * Resignation
 * Thomas Macfarlane
 * 1867
 * Kaiapoi
 * 5 July
 * Joseph Beswick
 * Resignation
 * John Studholme
 * 1867
 * Picton
 * 25 July
 * Arthur Beauchamp
 * Resignation
 * William Adams
 * 1867
 * Pensioner Settlements
 * 5 August
 * Paul de Quincey
 * Resignation
 * John Kerr
 * 1867
 * Ashley
 * 7 August
 * Lancelot Walker
 * Resignation
 * Henry Tancred
 * 1868
 * Omata
 * 7 February
 * Arthur Atkinson
 * Resignation
 * Charles Brown
 * 1868
 * Collingwood
 * 18 March
 * Andrew Richmond
 * Resignation
 * Arthur Collins
 * 1868
 * Westland Boroughs
 * 3 April
 * William Moorhouse
 * Resignation
 * William Harrison
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * 1868
 * Omata
 * 7 February
 * Arthur Atkinson
 * Resignation
 * Charles Brown
 * 1868
 * Collingwood
 * 18 March
 * Andrew Richmond
 * Resignation
 * Arthur Collins
 * 1868
 * Westland Boroughs
 * 3 April
 * William Moorhouse
 * Resignation
 * William Harrison
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * Resignation
 * William Harrison
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|

Supplementary election, 1868

 * colspan=2|Westland North
 * colspan=3 | 9 April 1868
 * Timothy Gallagher
 * colspan=2|Westland South
 * colspan=3 | 6 April 1868
 * Edmund Barff
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * Edmund Barff
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|

First Māori elections
! By-election !! Electorate !! Date !! Incumbent !! Reason !! Winner
 * colspan=2|Eastern Maori
 * colspan=3 |15 April 1868
 * Tāreha Te Moananui
 * colspan=2|Northern Maori
 * colspan=3 |15 April 1868
 * Frederick Russell
 * colspan=2|Southern Maori
 * colspan=3 |20 June 1868
 * John Patterson
 * colspan=2|Western Maori
 * colspan=3 |1 May 1868
 * Mete Kīngi Paetahi
 * - style="text-align:center;"
 * colspan=2|Western Maori
 * colspan=3 |1 May 1868
 * Mete Kīngi Paetahi
 * - style="text-align:center;"
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|
 * style="background-color:#EEEEEE;text-align:center;" colspan=6|

4th Parliament (continued)
|}
 * 1868
 * Avon
 * 8 June
 * William Reeves
 * Resignation
 * William Rolleston
 * 1868
 * Picton
 * 11 June
 * William Adams
 * Resignation
 * Courtney Kenny
 * 1868
 * Rangitiki
 * 22 June
 * William Watt
 * Resignation
 * William Fox
 * 1868
 * Franklin
 * 2 July
 * Robert Graham
 * Resignation
 * William Swan
 * 1868
 * Waikouaiti
 * 27 July
 * William Murison
 * Resignation
 * Robert Mitchell
 * 1868
 * Lyttelton
 * 2 November
 * George Macfarlan
 * Death
 * John Peacock
 * 1868
 * Timaru
 * 20 November
 * Alfred Cox
 * Resignation
 * Edward Stafford
 * 1868
 * City of Nelson
 * 24 December
 * Edward Stafford
 * Resignation
 * Nathaniel Edwards
 * 1869
 * Marsden
 * 25 January
 * Francis Hull
 * Resignation
 * John Munro
 * 1869
 * Roslyn
 * 12 February
 * George Hepburn
 * Resignation
 * Henry Driver
 * 1869
 * City of Dunedin
 * 5 March
 * James Paterson
 * Resignation
 * Thomas Birch
 * 1869
 * Northern Division
 * 15 March
 * James O'Neill
 * Resignation
 * Harry Farnall
 * 1869
 * Newton
 * 19 March
 * George Graham
 * Resignation
 * Robert Creighton
 * 1869
 * Waikouaiti
 * 27 April
 * Robert Mitchell
 * Resignation
 * Francis Rich
 * 1869
 * Town of New Plymouth
 * 28 April
 * Harry Atkinson
 * Resignation
 * Thomas Kelly
 * 1869 (1st)
 * Wallace
 * 30 April
 * Alexander McNeill
 * Resignation
 * Cuthbert Cowan
 * 1869
 * Oamaru
 * 25 May
 * Robert Campbell
 * Resignation
 * Charles Graham
 * 1869
 * Taieri
 * 19 June
 * Donald Reid
 * Resignation
 * Henry Howorth
 * 1869 (2nd)
 * Wallace
 * 17 September
 * Cuthbert Cowan
 * Resignation
 * George Webster
 * 1870
 * Bruce
 * 21 March
 * John Cargill
 * Resignation
 * James Brown
 * 1870
 * Mongonui
 * 30 March
 * Thomas Ball
 * Resignation
 * Thomas Gillies
 * 1870
 * Caversham
 * 25 April
 * Arthur John Burns
 * Resignation
 * James McIndoe
 * 1870
 * Omata
 * 27 April
 * Charles Brown
 * Resignation
 * Frederic Carrington
 * 1870
 * Parnell
 * 12 May
 * Charles Heaphy
 * Resignation
 * Reader Wood
 * 1870
 * Riverton
 * 18 May
 * Donald Hankinson
 * Resignation
 * Lauchlan McGillivray
 * 1870
 * Westland North
 * 2 July
 * Timothy Gallagher
 * Resignation
 * Thomas Kynnersley
 * 1870
 * City of Christchurch
 * 12 August
 * William Travers
 * Resignation
 * William Moorhouse
 * 1870
 * Parnell
 * 12 May
 * Charles Heaphy
 * Resignation
 * Reader Wood
 * 1870
 * Riverton
 * 18 May
 * Donald Hankinson
 * Resignation
 * Lauchlan McGillivray
 * 1870
 * Westland North
 * 2 July
 * Timothy Gallagher
 * Resignation
 * Thomas Kynnersley
 * 1870
 * City of Christchurch
 * 12 August
 * William Travers
 * Resignation
 * William Moorhouse
 * William Travers
 * Resignation
 * William Moorhouse