| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 70340 | Amelia | Saint Mary Parish | PO Box |
| 70342 | Berwick | Saint Mary Parish | Standard |
| 70380 | Morgan City | Saint Martin Parish | Standard |
| 70381 | Morgan City | Saint Mary Parish | PO Box |
| 70392 | Patterson | Saint Mary Parish | Standard |
| 70514 | Baldwin | Saint Mary Parish | Standard |
| 70522 | Centerville | Saint Mary Parish | PO Box |
| 70523 | Charenton | Saint Mary Parish | PO Box |
| 70538 | Franklin | Saint Mary Parish | Standard |
| 70540 | Garden City | Saint Mary Parish | PO Box |
| 70544 | Jeanerette | Iberia Parish | Standard |