| Mōkau River | |
| Map: | Mokau river basin.jpg |
| Map Size: | 270px |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | Region |
| Subdivision Name2: | Waikato |
| Subdivision Type3: | District |
| Subdivision Name3: | Waitomo |
| Length: | 158km (98miles) |
| Source1: | Pureora Forest |
| Source1 Location: | about 1 km south of Magokewa, near State Highway 30 |
| Mouth: | North Taranaki Bight |
The Mōkau River is located in the North Island of New Zealand.
The river rises as a spring in the Pureora Forest, south of Te Kūiti, on the slopes of the Rangitoto Range. After briefly following a north-westward course, it turns south-westwards and flows for 158km (98miles) through the Waitomo District of the King Country. It enters the North Taranaki Bight at its mouth at the town of Mōkau.
Although the rivermouth is enclosed by a large sandbar, with a high tide, larger vessels can pass safely and enter the river, which is navigable for 37km (23miles) upstream. In the late 19th century and early 20th century, the banks of the river were host to a thriving industry of logging and coal-mining. However, the risks and costs of transporting goods down the Mōkau eventually ended such enterprise.
Today the river is a popular whitebaiting and kayaking location.