| Postal Code | Place Name | Region | Department | Arrondissement | Canton |
|---|---|---|---|---|---|
| 42110 | Feurs | Auvergne-Rhône-Alpes | Loire | Montbrison | Feurs |
| 42111 | Saint-Didier-sur-Rochefort | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42130 | Boën-sur-Lignon | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42140 | Chazelles-sur-Lyon | Auvergne-Rhône-Alpes | Loire | Montbrison | Feurs |
| 42160 | Andrézieux-Bouthéon | Auvergne-Rhône-Alpes | Loire | Montbrison | Andrézieux-Bouthéon |
| 42170 | Saint-Just-Saint-Rambert | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42210 | Montrond-les-Bains | Auvergne-Rhône-Alpes | Loire | Montbrison | Andrézieux-Bouthéon |
| 42240 | Unieux | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42330 | Saint-Galmier | Auvergne-Rhône-Alpes | Loire | Montbrison | Andrézieux-Bouthéon |
| 42360 | Panissières | Auvergne-Rhône-Alpes | Loire | Montbrison | Feurs |
| 42380 | Luriecq | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42440 | Noirétable | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42450 | Sury-le-Comtal | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42550 | Usson-en-Forez | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42560 | Saint-Jean-Soleymieux | Auvergne-Rhône-Alpes | Loire | Montbrison | Montbrison |
| 42600 | Montbrison | Auvergne-Rhône-Alpes | Loire | Montbrison | Montbrison |
| 42610 | Saint-Romain-le-Puy | Auvergne-Rhône-Alpes | Loire | Montbrison | Montbrison |
| 42680 | Saint-Marcellin-en-Forez | Auvergne-Rhône-Alpes | Loire | Montbrison | Saint-Just-Saint-Rambert |
| 42890 | Sail-sous-Couzan | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42920 | Chalmazel | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42940 | Saint-Bonnet-le-Courreau | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |
| 42990 | Saint-Georges-en-Couzan | Auvergne-Rhône-Alpes | Loire | Montbrison | Boën-sur-Lignon |