The Waiohine River is a river of the Greater Wellington Region of New Zealand's North Island.

At first it flows generally south from its origins in the Tararua Range west of Ōtaki. It turns south-east once it reaches the plain where it passes to the north of Greytown and flows into the Ruamahanga River at Pāpāwai. Its main tributary is the Mangatarere Stream.

Some of its water reaches Lake Wairarapa directly through many channels and irrigation features in Greytown's fruit-growing district.

• List of rivers of New Zealand

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

41°05′14″S 175°30′15″E / 41.08722°S 175.50417°E / -41.08722; 175.50417