Ngaio is an inner suburb of Wellington, the capital city of New Zealand. It is situated on the slopes of Mount Kaukau, 3500 metres north of the city's CBD. It was settled in the 1840s and many of its streets are named after early settler families. Ngaio was originally a logging community known first as Upper Kaiwarra, then as Crofton until 1908. The area was administratively part of a separate local authority called the Onslow Borough Council which amalgamated with Wellington City in 1919.

Wellington is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the third-largest city in New Zealand, and is the administrative centre of the Wellington Region. It is the world's southernmost capital of a sovereign state. Wellington features a temperate maritime climate, and is the world's windiest city by average wind speed.