| Official Name: | Sian |
| Native Name: | Сиан |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Amur Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Amur Oblast |
| Subdivision Name3: | Zeysky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +9:00 |
| Coordinates: | 53.2833°N 183°W[1] |
Sian (Russian: Сиан) is a rural locality (a selo) in Siansky Selsoviet of Zeysky District, Amur Oblast, Russia. The population was 63 as of 2018.[2] There are 4 streets.
Sian is located 85 km southwest of Zeya (the district's administrative centre) by road. Chalbachi is the nearest rural locality.[3]