| Official Name: | Khandagay |
| Native Name: | Хандагай |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Khorinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 52°N 116°W[1] |
Khandagay (Russian: Хандагай) is a rural locality (a settlement) in Khorinsky District, Republic of Buryatia, Russia. The population was 448 as of 2010.[2] There are 9 streets.
Khandagay is located 61 km southwest of Khorinsk (the district's administrative centre) by road. Tarbagatay is the nearest rural locality.[3]