The Otaua River is a river of the Northland Region of New Zealand's North Island.

It is a tributary of the Punakitere River, which it reaches 5 kilometres (3 mi) south of the latter's outflow into the Waima River "Place name detail: Otaua River".

New Zealand Gazetteer.

Land Information New Zealand.

This article about a river in the Northland Region is a stub.