1821 in New Zealand

The following lists events that happened during 1821 in New Zealand.

Events

 * 12 July – Thomas Kendall, Hongi Hika and Waikato arrive back in the Bay of Islands from their trip to England. While in England they have helped to compile a Maori dictionary, met King George IV who gave Hongi a suit of armour, and Hongi has acquired a number of muskets (his primary purpose).
 * 20 July – Grass is sown for the first time in New Zealand, on land cleared from fern at Kerikeri.
 * 5 September – Hongi Hika and 2000 Ngā Puhi, armed with 1000 muskets, lay siege to Mauinaina pā at Tamaki. The pā is taken and the inhabitants massacred.
 * September
 * – John Gare Butler and his family move into the Mission House even though it is still unfinished.


 * Undated
 * Construction of the Mission House is started.
 * Late in the year Hongi Hika and Ngā Puhi lay siege to the Ngāti Maru pā at Te Totara (Thames), but after 2 days they make peace with the defenders and withdraw. They return that night and take the pā without difficulty.
 * Te Rauparaha and Ngāti Toa move south from Kawhia to resettle in Taranaki after several defeats by Waikato and Ngāti Maniapoto.

Births

 * 21 February (in Scotland): James Menzies, Superintendent of Southland Province.
 * 12 July (in England): William Richmond, politician.
 * 10 August (in England): John Turnbull Thomson, engineer and surveyor.
 * 29 August (in Kerikeri): Elizabeth Fairburn (later Elizabeth Colenso), missionary and Bible translator.
 * 10 September (in England): William Jervois, 10th Governor of New Zealand
 * 2 November (in Ireland): George Bowen, 5th Governor of New Zealand.


 * Undated
 * John Bacot, politician.
 * (in England): Samuel Bealey, runholder and politician.
 * (in England): Thomas Brunner, explorer.
 * (in Scotland): John Cargill, politician.
 * Oswald Curtis, politician.
 * George Hunter, politician.
 * (in England): Charles Kettle, surveyor of Dunedin.
 * Reader Wood, politician.
 * Approximate
 * (in England): William Montgomery, politician and merchant.
 * (in Ireland): George O'Brien, painter.