The Oruarangi Creek is a stream in Māngere, in the Auckland Region of New Zealand's North Island.

The name of the creek refers to Ruarangi, who was a chief of the patupaiarehe, supernatural beings who lived in the area before the arrival of people.

[2][3] The creek's catchment covers an area of 536 hectares (1,320 acres), including Airport Oaks industrial estate, Villa Maria Vineyard, farmland and Makaurau Marae.

[4] In 1960, the Manukau Sewage Purification Works (now Māngere Wastewater Treatment Plant) was opened,[5] The ponds caused degradation to the environment of the harbour, including traditional fishing grounds in the Oruarangi Creek, strong odours and swarms of Chironomus zealandicus (New Zealand midge) in the surrounding areas.

[5] Between 1998 and 2005, Watercare Services removed the oxidation ponds, allowing the creek to flow directly into the harbour again.