1825 in New Zealand
Regal and viceregal
- Head of State – King George IV
- Governor of New South Wales – Major-General Sir Thomas Brisbane, although recalled on 29 December 1824 only leaves in December this year. His successor, General Ralph Darling appointed in 1824 finally arrives in New South Wales on 25 December.
- Ngāpuhi chief Hongi Hika's campaign against Ngāti Whātua ends with the battle Te Ika a Ranganui on the Kaiwaka River (approximately 105 km north of modern downtown Auckland). Hongi's eldest son is killed in the battle. Most of the Ngāti Whatua survivors, heavily defeated, flee south, leaving Tāmaki-makau-rau (Auckland) almost deserted until the arrival of Governor William Hobson in 1840. Hongi later pursues the Ngāti Whatua survivors into the Waikato.
- The 1825 New Zealand Company forms. A preliminary expedition to New Zealand, with 60 artisans, leaves Great Britain on the Rosanna (Captain James Herd) and the Lambton (Captain Barnett) before the end of the year.
- Wesleyan missionary William White becomes possibly the first European to visit the central Waikato.
- 10 February (in England): William Reeves, Journalist and politician.
- 13 March (in England): Benjamin Mountfort, architect.
- 28 July (in England): Maxwell Bury, architect.
- 13 August (in England): William Gisborne, colonial secretary.
- 18 December (in England): William Sefton Moorhouse, politician.
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- List of years in New Zealand
- Timeline of New Zealand history
- History of New Zealand
- Military history of New Zealand
- Timeline of the New Zealand environment
- Timeline of New Zealand's links with Antarctica
- Dictionary of Australian Biography Sir Thomas Brisbane
- New Zealand Encyclopaedia 1966: Hongi Hika Biography
- Dictionary of New Zealand Biography: Hongi Hika
- A Manukau Timeline
- New Zealand Encyclopaedia 1966: 1825 New Zealand Company
- Dictionary of New Zealand Biography: William White
- Wilson, James Oakley (1985) [First published in 1913]. New Zealand Parliamentary Record, 1840–1984 (4th ed.). Wellington: V.R. Ward, Govt. Printer. OCLC 154283103.
- "Benjamin Mountfort and the Gothic Revival". Christchurch City Libraries.
- Marchant, Anne, Bury, Maxwell, 1825-1912, architect, engineer in The Dictionary of New Zealand Biography Volume Two (1870-1900), 1993.
- Bohan, Edmund. (22 June 2007). "Gisborne, William 1825 - 1898". Dictionary of New Zealand Biography.
- Macdonald, G.R. (1966). "MOORHOUSE, William Sefton". An Encyclopaedia of New Zealand, edited by A. H. McLintock. Te Ara - The Encyclopedia of New Zealand.
- Te Papa: George Boyd