| Official Name: | Khilgantuy |
| Native Name: | Хилгантуй |
| Settlement Type: | Ulus |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Kyakhtinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 50.4333°N 159°W[1] |
Khilgantuy (Russian: Хилгантуй; Buriat: Хилганта, Khilganta) is a rural locality (an ulus) in Kyakhtinsky District, Republic of Buryatia, Russia. The population was 161 as of 2010.[2] There are 6 streets.
Khilgantuy is located 77 km northeast of Kyakhta (the district's administrative centre) by road. Ust-Kiran is the nearest rural locality.[3]