The Montgomerie River is a river in the Buller District of New Zealand's South Island. It flows southwest from the Victoria Range to reach the Waitahu River 12 kilometres (7.5 mi) east of Reefton. The river's entire length is within Victoria Forest Park.

• List of rivers of New Zealand

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

42°09′S 172°00′E / 42.150°S 172.000°E / -42.150; 172.000