Castelnau-d'Arbieu (French pronunciation: [kastɛlno daʁbjø]; Occitan: Castèthnau d'Arbiu) is a commune in the Gers department in southwestern France.
Castelnau-d'Arbieu | |
|---|---|
Commune | |
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Coat of arms | |
Location of Castelnau-d'Arbieu ![]() | |
Castelnau-d'Arbieu Castelnau-d'Arbieu | |
| Coordinates: 43°53′01″N 0°42′20″E | |
| Country | France |
| Region | Occitania |
| Department | Gers |
| Arrondissement | Condom |
| Canton | Fleurance-Lomagne |
| Intercommunality | Lomagne Gersoise |
| Government | |
| • Mayor (2020–2026) | Olivier Tarbouriech |
| Area 1 | 16.34 km2 (6.31 sq mi) |
| Population | 231 |
| • Density | 14/km2 (37/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| INSEE/Postal code | 32078 /32500 |
| Elevation | 79–231 m (259–758 ft) (avg. 209 m or 686 ft) |
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |

| Year | Pop. | ±% |
|---|---|---|
| 1962 | 287 | — |
| 1968 | 270 | −5.9% |
| 1975 | 220 | −18.5% |
| 1982 | 204 | −7.3% |
| 1990 | 188 | −7.8% |
| 1999 | 187 | −0.5% |
| 2008 | 201 | +7.5% |
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