The Waiotauru River is a river of the Wellington Region of New Zealand's North Island. It flows generally north from two branches, the Southern Waiotauru River and the Eastern Waiotauru (or Snowy) River. Both of these branches have their origins in the southwestern Tararua Range, with the Eastern branch having its origin on the slopes of Mount Hector, and the Southern on Renata. The Waiotauru meets the Ōtaki River at Ōtaki Forks, 15 kilometres (9 mi) southeast of Ōtaki.

• List of rivers of New Zealand

"Place name detail: Waiotauru River". New Zealand Gazetteer. New Zealand Geographic Board. Retrieved 12 July 2009.