|Basin countries||New Zealand|
|Length||36 kilometres (22 mi)|
The Omaka River is a river of the Marlborough Region of New Zealand's South Island. It flows north from the slopes of Mount Horrible 30 kilometres west of Seddon, reachin the Opawa River at the eastern end of Renwick.
"Place Name Detail: Omaka River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
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