|Mouth||confluence with the Ruamahanga River|
|Progression||Ruamahanga – Cook Strait|
|Basin countries||New Zealand|
|Length||28 kilometres (17 mi)|
The Kopuaranga River is a river of the Wairarapa, in New Zealand's North Island. It flows generally south from rough hill country southwest of Eketahuna, reaching its outflow into the Ruamahanga River five kilometres north of Masterton.
"Place Name Detail: Kopuaranga River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
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