| Official Name: | Zaktuy |
| Native Name: | Зактуй |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Tunkinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 51.6833°N 139°W[1] |
Zaktuy (Russian: Зактуй; Buriat: Загтад, Zagtad) is a rural locality (a selo) in Tunkinsky District, Republic of Buryatia, Russia. The population was 191 as of 2010.[2] There are 4 streets.
Zaktuy is located 36 km east of Kyren (the district's administrative centre) by road. Tunka is the nearest rural locality.[3]