| Official Name: | Uoyan |
| Native Name: | Уоян |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Severo-Baykalsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 56.1167°N 148°W[1] |
Uoyan (ru|Уоян) is a rural locality (a settlement) in Severo-Baykalsky District, Republic of Buryatia, Russia. The population was 334 as of 2010.[2] There are 11 streets.
Uoyan is located 162 km east of Nizhneangarsk (the district's administrative centre) by road. Novy Uoyan is the nearest rural locality.[3]