The Waireia River is a river of the Auckland Region of New Zealand's North Island. Part of the Kaipara Harbour system, it flows north to meet the Oruawharo River 10 kilometres (6 mi) west of Wellsford.

• List of rivers of New Zealand

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