| Waitohi River | |
| Subdivision Type1: | Country |
| Length: | 41km (25miles) |
| Source1 Coordinates: | -42.9776°N 172.2902°W |
| Mouth Location: | Near Hurunui and State Highway 7 bridge |
| Tributaries Left: | Whistling Creek, Big Bush Stream, Jacks Stream, |
| Tributaries Right: | Retreat Creek, Bridge Creek, Taruna Stream, Washpen Stream |
The Waitohi River is a river of the north Canterbury region of New Zealand's South Island. It initially flows northeast from its origins in the Puketeraki Range 25km (16miles) south of Lake Sumner before turning eastwards to reach the Hurunui River at the settlement of Hurunui.