The following table contains the by-elections that have occurred during the term of the 19th Parliament.
| Electorate and by-election | Date | Incumbent | Cause | Winner | |||
|---|---|---|---|---|---|---|---|
| Dunedin Central | 1915 | 3 February | Charles Statham | Resignation | Charles Statham | ||
| Bay of Islands | 1915 | 8 June | Vernon Reed | Election declared void[1] | William Stewart | ||
| Taumarunui | 1915 | 15 June | William Jennings | Election declared void[2] | William Jennings | ||
| Pahiatua | 1916 | 17 August | James Escott | Death | Harold Smith | ||
| Hawke's Bay | 1917 | 8 March | Robert McNab | Death | John Findlay | ||
| Bay of Islands | 1917 | 17 March | William Stewart | Resignation | Vernon Reed | ||
| Grey | 1917 | 24 November | Paddy Webb | Resignation | Paddy Webb | ||
| Wellington North | 1918 | 12 February | Alexander Herdman | Resignation | John Luke | ||
| Southern Maori | 1918 | 21 February | Taare Parata | Death | Hopere Uru | ||
| Grey | 1918 | 29 May | Paddy Webb | Imprisonment | Harry Holland | ||
| Wellington Central | 1918 | 3 October | Robert Fletcher | Death | Peter Fraser | ||
| Taranaki | 1918 | 10 October | Henry Okey | Death | Sydney Smith | ||
| Palmerston | 1918 | 19 December | David Buick | Death | Jimmy Nash | ||
| Wellington South | 1918 | 19 December | Alfred Hindmarsh | Death | Bob Semple | ||
References
- ^ "Election void, Vernon Reed disqualified for a year". Colonist. Vol. LVII, no. 13773. 10 May 1915. p. 4. Retrieved 14 August 2011.
- ^ "Mr Jennings Unseated for Taumarunui". Ashburton Guardian. Vol. XXXV, no. 9140. 14 May 1915. p. 4. Retrieved 14 August 2011.