The Hunua electorate existed three times for the New Zealand House of Representatives beginning in 1978, based at the south end of the Auckland urban area, and named for the Hunua Ranges. It covered different geographical areas over those periods. The electorate is currently represented by Andrew Bayly of the National Party.
The 1977 electoral redistribution was the most overtly political since the Representation Commission had been established through an amendment to the Representation Act in 1886, initiated by Muldoon's National Government. As part of the 1976 census, a large number of people failed to fill out an electoral re-registration card, and census staff had not been given the authority to insist on the card being completed. This had little practical effect for people on the general roll, but it transferred Māori to the general roll if the card was not handed in. Together with a northward shift of New Zealand's population, this resulted in five new electorates having to be created in the upper part of the North Island. The electoral redistribution was very disruptive, and 22 electorates were abolished, while 27 electorates were newly created (including Hunua) or re-established. These changes came into effect for the 1978 election.
Population centres of the original electorate included Cockle Bay in the north-west, East Tamaki in the west, the settlement of Hunua itself, Mangatawhiri in the south, and Kaiaua in the east. The electorate existed for two parliamentary periods until the 1983 electoral redistribution, when boundary changes forced its abolition ahead of the 1984 election. The north-west corner went to the newly established Otara electorate, and the remaining part was absorbed by the reconstituted Franklin electorate.