| Official Name: | Mengey |
| Native Name: | Мэнгэй |
| Settlement Type: | Ulus |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name3: | Selenginsky District |
| Subdivision Type4: | Municipality |
| Population Footnotes: | [1] |
| Population Total: | 13 |
| Population As Of: | 2010 |
| Utc Offset1: | +8:00 |
| Coordinates: | 51°N 161°W[2] |
Mengey (Russian: Мэнгэй) is a rural locality (an ulus) in Selenginsky District, Republic of Buryatia, Russia. The population was 13 as of 2010.[1] There is 1 street.