| Official Name: | Burgastay |
| Native Name: | Бургастай |
| 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: | 51.15°N 143°W[1] |
Burgastay (Russian: Бургастай; Buriat: Бургаастай, Burgaastai) is a rural locality (an ulus) in Selenginsky District, Republic of Buryatia, Russia. The population was 96 as of 2010.[2]
Burgastay is located 38 km south of Gusinoozyorsk (the district's administrative centre) by road. Novoselenginsk is the nearest rural locality.[3]