The Mangapapa River is a river of the Manawatū-Whanganui region of New Zealand's North Island.

The river rises near the remote settlement of Mangapapa, northwest of Mangaweka.

It flows westward through heavily eroded hilly farmland to meet the Turakina River.

There is a 12-metre (39 ft) waterfall on the lower reaches of the river.

This article about a river in Manawatū-Whanganui is a stub.