The Orowaiti River is a river of the West Coast Region of New Zealand's South Island. The smaller of the two rivers which run through the town of Westport, it reaches the Karamea Bight three kilometres to the east of its larger neighbour, the Buller River.

• List of rivers of New Zealand

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

41°45′S 171°38′E