| Cavendish River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Cavendish River |
| Source1: | Caton Peak |
| Source1 Coordinates: | -46.0554°N 166.8822°W |
| Mouth Location: | Foveaux Strait |
| Mouth Elevation: | 0m (00feet) |
| Mouth Coordinates: | -46.2101°N 166.8721°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 150NaN0 |
| Progression: | Cavendish River → Foveaux Strait |
The Cavendish River is a river of New Zealand. It is one of the southernmost rivers of the country's South Island, flowing south for 15km (09miles) to reach Foveaux Strait on the southern coast of Fiordland. The river was named in 1882 by John Hay in commemoration of Lord Frederick Cavendish, who was murdered in Dublin's Phoenix Park earlier that year.[1]