Pontchâteau
| Pontchâteau | |
|---|---|
| Commune | |
| Town hall | |
| Location of Pontchâteau | |
| Coordinates: 47°25′48″N 2°04′59″W / 47.43°N 2.083°W | |
| Country | France | 
| Region | Pays de la Loire | 
| Department | Loire-Atlantique | 
| Arrondissement | Saint-Nazaire | 
| Canton | Pontchâteau | 
| Intercommunality | Pays de Pontchâteau St-Gildas-des-Bois | 
| Government | |
| • Mayor (2020–2026) | Danielle Cornet | 
| Area 1 | 55.79 km2 (21.54 sq mi) | 
| Population  (2022) | 11,249 | 
| • Density | 200/km2 (520/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 44129 /44160 | 
| Elevation | 0–52 m (0–171 ft) (avg. 7 m or 23 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Pontchâteau (French pronunciation: [pɔ̃ʃato] ⓘ; Breton: Pontkastell-Keren) is a commune in the Loire-Atlantique department in western France.