| Slate River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Slate River |
| Source1 Location: | Slate River Peak |
| Source1 Coordinates: | -40.9052°N 172.6209°W |
| Mouth Location: | Ōtere River |
| Mouth Coordinates: | -40.7631°N 172.7101°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Progression: | Slate River → Aorere River → Ruataniwha Inlet → Golden Bay / Mohua → Tasman Sea |
| Tributaries Left: | Serpentine Creek, Whitehorn Creek, Kill Devil Creek, Snow River, Rocky River |
| Tributaries Right: | Fletcher Creek |
The Slate River is located in the northwest of the South Island of New Zealand. It is a tributary of the Aorere River.