| Source1 location | Ben McLeod Range |
|---|---|
| Mouth location | Orari River |
| Country | New Zealand |
| Length | 23 km |
The Hewson River is a river of New Zealand's South Island. It flows east and then south from the Ben McLeod Range of inland Canterbury before flowing into the upper reaches of the Orari River 5 kilometres (3 mi) west of Mount Peel.