Onerahi is a seaside suburb of Whangārei, New Zealand's northernmost city. It is the city's only seaside suburb. It is located 9 km south-east of the centre of Whangārei and is principally a peninsula in the Whangārei Harbour, which empties into the Pacific Ocean. The New Zealand Ministry for Culture and Heritage gives a translation of "long beach" for Onerahi. The suburb's main feature is Whangarei Airport, located on the large flat area at the southern end of the suburb, which was built up using material from the site of a former Maori Pa (fortress) just to the north.