Onehunga is a suburb of Auckland in New Zealand and the location of the Port of Onehunga, the city's small port on the Manukau Harbour. It is eight kilometres south of the city centre, close to the volcanic cone of Maungakiekie / One Tree Hill.
Onehunga is a residential and light-industrial suburb. There are almost 1,000 commercial and industrial businesses in the area. Onehunga stretches south from Royal Oak to the northern shore of the Manukau Harbour. To the east are the areas of Oranga and Te Papapa; to the west, Hillsborough. On the southern shore of the Manukau Harbour, and linked to Onehunga by two bridges, is the suburb of Māngere Bridge.