| Postal Code | Place Name | Region | Department | Arrondissement | Canton |
|---|---|---|---|---|---|
| 42000 | Saint-Étienne | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Étienne |
| 42100 | Saint-Étienne | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Étienne |
| 42131 | La Valla-en-Gier | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42150 | La Ricamarie | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Etienne-2 |
| 42152 | L'Horme | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Chamond |
| 42220 | Bourg-Argental | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42230 | Roche-la-Molière | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Étienne |
| 42270 | Saint-Priest-en-Jarez | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Etienne-5 |
| 42290 | Sorbiers | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Sorbiers |
| 42350 | La Talaudière | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Sorbiers |
| 42390 | Villars | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Etienne-4 |
| 42400 | Saint-Chamond | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Chamond |
| 42410 | Chavanay | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42420 | Lorette | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Rive-de-Gier |
| 42480 | La Fouillouse | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Sorbiers |
| 42490 | Fraisses | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Firminy |
| 42500 | Le Chambon-Feugerolles | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Etienne-2 |
| 42520 | Maclas | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42570 | Saint-Héand | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Sorbiers |
| 42580 | L'Étrat | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Sorbiers |
| 42650 | Saint-Jean-Bonnefonds | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Saint-Etienne-5 |
| 42660 | Saint-Genest-Malifaux | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42700 | Firminy | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Firminy |
| 42740 | Saint-Paul-en-Jarez | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Le Pilat |
| 42800 | Rive-de-Gier | Auvergne-Rhône-Alpes | Loire | Saint-Étienne | Rive-de-Gier |