Coordinates: 36°18′S 174°45′E / 36.300°S 174.750°E Whangateau is a small coastal settlement on the east coast of the North Island of New Zealand. It is situated in Rodney District, part of the Auckland Region, and is on a peninsula stretching out into the Hauraki Gulf, north of Auckland. Whangateau is on the northern shore of Whangateau Harbour which is fed by the Omaha River and separated from Omaha Bay by the Maungatawhiri sandspit. The settlement is in two parts of 20 to 30 houses each. The main settlement includes a large public reserve with sports fields and a campground. There is also a public hall which hosts music events and a flax weaving group. The smaller settlement is Tram Car Bay, named for two tram cars which were used as holiday homes. Whangateau is situated between the rural settlement of Matakana and the fishing village of Leigh.A tsunami siren is located in the town.
The wider Omaha area around Whangateau Harbour was a favourite source of fish and birds for Māori tribes for centuries before the arrival of Europeans. (Omaha means 'Place of Plenty'). There were many disputes over control and the only tribe in residence at the time of the first European settlement was Ngāti Wai, whose chief Te Kiri gave the Leigh marae its name.
In 1858 the Pakiri block was purchased from Maori by the Crown and in 1892 the area around Whangateau was surveyed into 30 or 40-acre (160,000 m2) blocks for settlement by immigrants from England and Scotland. The public reserve, which is on the waterfront, was surveyed and plans for a school and hall were formulated. Smaller house sites were established close to the reserve. The school was later closed but a hall was built around 1898, and remains today as the focal point of the settlement. Until the 1980s there was a store located on the main road, which was featured in a 1985 Tip Top Trumpet television commercial starring Kiwi model Rachel Hunter.