Kopuaranga River

The Kopuaranga River (officially Kōpuaranga River) is a river of the Wairarapa, in New Zealand's North Island. It flows generally south from rough hill country southwest of Eketāhuna, reaching its outflow into the Ruamahanga River 5 km north of Masterton.

In December 2019, the approved official geographic name of the river was gazetted as "Kōpuaranga River".