St. Mary County, Louisiana ZIP Codes
- ZIP records
8 - Cities represented
8 - Sum of listed ZIP population estimates
48,658
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 70380 | Morgan City | 20,529 |
| 2 | 70538 | Franklin | 12,464 |
| 3 | 70392 | Patterson | 8,173 |
| 4 | 70342 | Berwick | 4,607 |
| 5 | 70514 | Baldwin | 1,914 |
| 6 | 70522 | Centerville | 495 |
| 7 | 70523 | Charenton | 476 |
Cities in St. Mary County
ZIP Directory
Browse all ZIP data for Louisiana
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.