| Official Name: | Ardasan |
| Native Name: | Ардасан |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Selenginsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 51.4333°N 140°W[1] |
Ardasan (Russian: Ардасан) is a rural locality (a settlement) in Selenginsky District, Republic of Buryatia, Russia. The population was 163 as of 2010.[2] There are 4 streets.
Ardasan is located 25 km north of Gusinoozyorsk (the district's administrative centre) by road. Yagodnoye is the nearest rural locality.[3]