Maungakiekie / One Tree Hill is a 182-metre (597 ft) volcanic peak in Auckland, New Zealand. It is an important memorial place for both Māori and other New Zealanders. The suburb around the base of the hill is also called One Tree Hill. It is surrounded by the suburbs of Royal Oak to the west, and clockwise, Epsom, Greenlane, Oranga, and Onehunga. The summit provides views across the Auckland area, and allows visitors to see both of Auckland's harbours.
The hill's scoria cones were erupted from three craters – one is intact and two have been breached by lava flows that rafted away part of the side of the scoria cone. Lava flows went in all directions, many towards Onehunga, covering an area of 20 square kilometres (7.7 sq mi), making it the second largest (in area covered) of the Auckland volcanic field, behind Rangitoto Island. The age of eruption is currently unknown, but it is older than 28,500 years as it has a mantling of volcanic ash erupted at that time from Te Tātua-a-Riukiuta volcano.
Maungakiekie is a New Zealand parliamentary electorate, returning one Member of Parliament to the House of Representatives of New Zealand. The current MP for Maungakiekie is Sam Lotu-Iiga of the National Party. The name is from Maungakiekie / One Tree Hill, a large and symbolically important hill at the western end of the seat; the name denotes the presence of kiekie vines on the hill.
The core of Maungakiekie is the suburbs of Auckland clustered around the Southern Motorway, and the most southern parts of Auckland City facing the Manukau Harbour. As at 2008, these include Penrose, Panmure, Onehunga and Royal Oak. In character, the seat is a minority-majority seat, with a large Māori, Pacific Island and Asian population. It is also quite a young seat, with 46.8 percent of the seat's residents under the age of thirty.
Maungakiekie has existed in various forms since its creation ahead of the introduction of Mixed Member Proportional voting in the 1996 election. It was created from merging most of Onehunga with a large section of Panmure, both of them reasonably safe Labour seats. Its original incarnation included both Onehunga and Otahuhu, though for the nine years from 1996, Onehunga was part of Mount Roskill, and from 2008 onwards, Otahuhu formed the northernmost part of Manukau East. The same boundary changes that took Otahuhu out put Panmure in at the expense of Tāmaki.