|River mouth||Poerua River|
|Length||8 km (5.0 mi)|
The Willberg River (also spelt Wilberg River) is a river of the West Coast Region of New Zealand's South Island. It initially flows northwest before turning southwest, reaching the Poerua River 12 kilometres south of Harihari.
"Place Name Detail: Willberg River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
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