|River mouth||Hokianga Harbour|
|Length||14 kilometres (8.7 mi)|
The Omanaia River is a river of the Northland Region of New Zealand's North Island. It flows northwest from the Waima Forest, first as a stream and then as a silty arm of the Hokianga Harbour. The toiwnship of Rawene stands at the point where the river meets the main waters of the harbour.
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