| Official Name: | Sioni |
| Native Name: | სიონი |
| Settlement Type: | Townlet |
| Pushpin Map: | Georgia#Georgia Mtskheta-Mtianeti |
| Pushpin Mapsize: | 280 |
| Pushpin Map Caption: | Location of Dusheti in Georgia |
| Subdivision Type: | Country |
| Subdivision Type1: | Mkhare |
| Subdivision Name1: | Mtskheta-Mtianeti |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Tianeti |
| Population As Of: | 2014 |
| Population Total: | 371 |
| Timezone: | Georgian Time |
| Utc Offset: | +4 |
| Coordinates: | 41.9894°N 45.025°W |
| Elevation M: | 1000 |
Sioni is a townlet in Georgia, the part of Tianeti Municipality, in the Mtskheta-Mtianeti region. Located 80km (50miles) from the Tbilisi railway station, it arose in 1951 during the construction of the Sioni reservoir. Sioni obtained status of a townlet in 1960. Until the 1970s, it was called Sionmsheni.