Sostis
Sostis 
    Σώστης  | |
|---|---|
| Coordinates: 41°08′N 25°17′E / 41.133°N 25.283°E | |
| Country | Greece | 
| Administrative region | East Macedonia and Thrace | 
| Regional unit | Rhodope | 
| Municipality | Iasmos | 
| Area | |
| • Municipal unit | 229.2 km2 (88.5 sq mi) | 
| Elevation | 60 m (200 ft) | 
| Population  (2021)  | |
| • Municipal unit | 5,521 | 
| • Municipal unit density | 24/km2 (62/sq mi) | 
| • Community | 632 | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Vehicle registration | ΚΟ | 
Sostis (Greek: Σώστης, romanized: Sóstis; Turkish: Susurköy) is a village and a former municipality in the Rhodope regional unit, East Macedonia and Thrace, Greece. Since the 2011 local government reform it is part of the municipality Iasmos, of which it is a municipal unit. The municipal unit has an area of 229.190 km2. The population was 5,521 in 2021.