Châteaulin
| Châteaulin | |
|---|---|
| Subprefecture and commune | |
| Châteaulin and the Aulne | |
| Location of Châteaulin | |
| Coordinates: 48°11′51″N 4°05′19″W / 48.1975°N 4.0886°W | |
| Country | France | 
| Region | Brittany | 
| Department | Finistère | 
| Arrondissement | Châteaulin | 
| Canton | Crozon | 
| Intercommunality | Pleyben-Châteaulin-Porzay | 
| Government | |
| • Mayor (2020–2026) | Gaëlle Nicolas | 
| Area 1 | 20.81 km2 (8.03 sq mi) | 
| Population  (2022) | 5,106 | 
| • Density | 250/km2 (640/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 29026 /29150 | 
| Elevation | 2–206 m (6.6–675.9 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Châteaulin (French: [ʃɑtolɛ̃] ⓘ; Breton: Kastellin) is a commune in the Finistère department and administrative region of Brittany in north-western France. It is a sub-prefecture of the department.