| Official Name: | Udunga |
| Native Name: | Удунга |
| Settlement Type: | Ulus |
| 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: | 51.1167°N 163°W[1] |
Udunga (Russian: Удунга; Buriat: Үдэнгэ, Üdenge) is a rural locality (an ulus) in Selenginsky District, Republic of Buryatia, Russia. The population was 76 as of 2010.[2] There are 4 streets.
Udunga is located 80 km southwest of Gusinoozyorsk (the district's administrative centre) by road. Ust-Urma is the nearest rural locality.[3]