| Tragilos | |
| Name Local: | Τράγιλος |
| Type: | municipal unit |
| Periph: | Central Macedonia |
| Periphunit: | Serres |
| Pop Municunit: | 3104 |
| Pop Community: | 417 |
| Population As Of: | 2021 |
| Area Municunit: | 197.8 |
| Coordinates: | 40.8833°N 68°W |
| Licence: | ΕΡ |
Tragilos (Greek, Modern (1453-);: Τράγιλος, in Greek, Modern (1453-); pronounced as /ˈtraʝilos/) is a village and a former municipality in the Serres regional unit, Greece. Since the 2011 local government reform it is part of the municipality Visaltia, of which it is a municipal unit.[1] The municipal unit has an area of 197.758 km2.[2] Population 3,104 (2021). The seat of the municipality was in Mavrothalassa.