| Castelner | |
|---|---|
|   | |
| Coordinates: 43°33′12″N0°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 [1] | 
| Area 1 | 5.73 km2 (2.21 sq mi) | 
| Population | 119 | 
| • Density | 21/km2 (54/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code |  40073 /40700 | 
| Elevation | 74–202 m (243–663 ft) (avg. 180 m or 590 ft) | 
| 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. [3]
| Year | Pop. | ±% p.a. | 
|---|---|---|
| 1968 | 95 | — | 
| 1975 | 81 | −2.25% | 
| 1982 | 85 | +0.69% | 
| 1990 | 88 | +0.43% | 
| 1999 | 103 | +1.76% | 
| 2009 | 122 | +1.71% | 
| 2014 | 111 | −1.87% | 
| 2020 | 119 | +1.17% | 
| Source: INSEE [4] | ||
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