| Bâgé-le-Châtel | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Bâgé-le-Châtel (Ain).svg |
| Arrondissement: | Bourg-en-Bresse |
| Canton: | Replonges |
| Insee: | 01026 |
| Postal Code: | 01380 |
| Mayor: | Jean-Louis Malaterre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bresse et Saône |
| Coordinates: | 46.3°N 4.9333°W |
| Elevation M: | 209 |
| Elevation Min M: | 184 |
| Elevation Max M: | 211 |
| Area Km2: | 0.88 |
Bâgé-le-Châtel (in French pronounced as /bɑʒe lə ʃɑtɛl/) is a commune in the Ain department in eastern France.
The name of Bâgé-le-Châtel comes from a Gallo-Roman villa belonging to a certain Balgiasius.
In the Middle Ages, three parishes were formed on the territory of the Seigneurs de Bâgé: Bâgé-le-Châtel around the chateau, Saint-André where the church was built, and Bâgé-la-Ville, the largest town.
Bâgé-le-Châtel is the ancient capital of Bresse. In 1272, Bresse became part of Savoy when Sibylle de Bâgé, sole heir, married Amadeus V, Count of Savoy. Bourg (today Bourg-en-Bresse), a fortified bastion with 3400 inhabitants, became the capital of Bresse. Bâgé remained a village, whereas Bourg expanded beyond its walls to become the city of today.