Onerahi, for half a century known as Grahamtown, 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.