| Zi River | |
| Map: | Dongtingriversmap.png |
| Map Size: | 300px |
| Pushpin Map: | Hunan |
| Pushpin Map Caption: | Location of mouth in Hunan Province |
| Subdivision Type1: | Country |
| Subdivision Name1: | China |
| Subdivision Type2: | Province |
| Subdivision Name2: | Hunan |
| Mouth Coordinates: | 28.8°N 112.633°W |
The Zi River (资水) in Hunan, China, flows into the Yangtze River via Lake Dongting.[1]