The Mamaku Ranges are a range of rugged hills in the North Island of New Zealand. Located to the west of Lake Rotorua and north of Lake Taupo, they lie to the immediate south of the Kaimai Ranges and can be thought of as an extension of them, in much the same way that the Kaimais themselves could be considered an extension of the Coromandel Peninsula. The hills terminate in the south with the valley of the Waikato River.

At their highest, the Mamaku Ranges rise to over 600 metres, and much of the high ground within the hills forms a plateau. The range is extensively forested, with the Kaimai-Mamaku State Forest and Kinleith Forest both covering a considerable part of them.