Castelnau-Barbarens
| Castelnau-Barbarens | |
|---|---|
| The church in Castelnau-Barbarens | |
| Location of Castelnau-Barbarens | |
| Coordinates: 43°34′38″N 0°43′29″E / 43.5772°N 0.7247°E | |
| Country | France | 
| Region | Occitania | 
| Department | Gers | 
| Arrondissement | Auch | 
| Canton | Astarac-Gimone | 
| Intercommunality | CA Grand Auch Cœur Gascogne | 
| Government | |
| • Mayor (2020–2026) | Michel Burgan | 
| Area 1 | 42.37 km2 (16.36 sq mi) | 
| Population  (2022) | 579 | 
| • Density | 14/km2 (35/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 32076 /32450 | 
| Elevation | 157–291 m (515–955 ft) (avg. 295 m or 968 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Castelnau-Barbarens (Gascon: Castèthnau Barbarens) is a commune in the Gers department in southwestern France.