|Basin countries||New Zealand|
|Length||10 kilometres (6.2 mi)|
The Mangapai River is a river of the Northland Region of New Zealand's North Island. It is perhaps better described as a silty arm of Whangarei Harbour, located 10 kilometres due south of Whangarei. Its average width is some four kilometres, but the silty nature of its course means that the stream itself is far narrower.
"Place Name Detail: Mangapai River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
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