| Saxon River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Saxon River |
| Source1 Coordinates: | -40.8889°N 172.3097°W |
| Mouth Location: | Big River |
| Mouth Coordinates: | -40.8362°N 172.2657°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 12km (07miles) |
| Progression: | Saxon River → Big River → Tasman Sea |
| Tributaries Left: | Blue Duck Creek |
The Saxon River is a river of the Tasman Region of New Zealand's South Island. It flows northwest to reach the Big River 10 kilometres southeast off Kahurangi Point. The Saxon river's entire length is within Kahurangi National Park.