The Ōmaha River is a river of the Auckland Region of New Zealand's North Island. It flows south to reach the Pacific Ocean at the western end of Whangateau Harbour, 3 kilometres (2 mi) west of Ōmaha.

• List of rivers of New Zealand

"Place name detail: Ōmaha River". New Zealand Gazetteer. New Zealand Geographic Board. Retrieved 4 January 2024.