|River mouth||Oruawharo River|
|Length||8 km (5 mi)|
The Waireia River is a river of the Auckland Region of New Zealand's North Island. Part of the Kaipara Harbour system, it flows north to meet the Oruawharo River 10 kilometres (6 mi) west of Wellsford.
- "Place Name Detail: Waireia River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
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