Varnavas
| Varnavas Βαρνάβας | |
|---|---|
| Coordinates: 38°13′N 23°55′E / 38.217°N 23.917°E | |
| Country | Greece | 
| Administrative region | Attica | 
| Regional unit | East Attica | 
| Municipality | Marathon | 
| Area | |
| • Municipal unit | 37.349 km2 (14.421 sq mi) | 
| Elevation | 453 m (1,486 ft) | 
| Population  (2021) | |
| • Municipal unit | 1,771 | 
| • Municipal unit density | 47/km2 (120/sq mi) | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Postal code | 190 14 | 
| Area code(s) | 22950 | 
| Vehicle registration | ZX | 
Varnavas (Greek: Βαρνάβας "Barnabas") is a town in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Marathon, of which it is a municipal unit. It is part of Athens metropolitan area.
On 11 Aug 2024, a large wildfire in Varnavas caused smoke over Athens.