| Source1 location | Hanmer Range |
|---|---|
| Mouth location | Waiau River |
| Country | New Zealand |
| Length | 14 km |
The Percival River is a river of the Canterbury region of New Zealand's South Island. It flows southwest from its origins in the Hanmer Range to the northeast of Hanmer Springs, reaching the Waiau River 7 kilometres (4 mi) south of the town.