| Zip Code | City | Population ↓ |
|---|---|---|
| 70380 | Morgan City | 20,877 |
| 70390 | Napoleonville | 7,336 |
| 70339 | Pierre Part | 4,769 |
| 70341 | Belle Rose | 3,848 |
| 70372 | Labadieville | 1,967 |
| 70393 | Plattenville | 151 |
| 70391 | Paincourtville | 101 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Assumption Parish, Louisiana (US Census).