Castelner | |
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 Location of Castelner | |
  Castelner Location within France  Castelner Location within Nouvelle-Aquitaine | |
| Coordinates: 43°33′12″N 0°34′54″W / 43.5533°N 0.5817°W | |
| Country | France |
| Region | Nouvelle-Aquitaine |
| Department | Landes |
| Arrondissement | Mont-de-Marsan |
| Canton | Chalosse Tursan |
| Government | |
| • Mayor (2020–2026) | Dominique Lastes |
Area 1 | 5.73 km2 (2.21 sq mi) |
| Elevation | 180 m (590 ft) |
| Highest elevation | 202 m (663 ft) |
| Lowest elevation | 74 m (243 ft) |
| Population (2023) | 120 |
| • Density | 21/km2 (54/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| INSEE/Postal code | 40073 /40700 |
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Castelner is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France.
