St. Mary County, LA Zip Codes
8 zip codes across 7 cities in St. Mary County, LA
About St. Mary County
St. Mary County, Louisiana (LA) contains 8 unique zip codes spanning 7 cities and communities. Each zip code covers a different area within the county, with varying demographics, income levels, and housing markets.
Browse the complete list below to find detailed population, income, home values, cost of living, and climate data for any zip code in St. Mary County.
Cities in St. Mary County
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All Zip Codes in St. Mary County, LA
| Zip Code | City |
|---|---|
| 70342 | Berwick |
| 70380 | Morgan City |
| 70392 | Patterson |
| 70514 | Baldwin |
| 70523 | Charenton |
| 70538 | Franklin |
| 70540 | Franklin |
| 705XX | Zcta 705xx |
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Frequently Asked Questions
How many zip codes are in St. Mary County, LA?
St. Mary County, LA has 8 zip codes across 7 cities.
What cities are in St. Mary County?
Cities in St. Mary County include Baldwin, Berwick, Charenton, Franklin, Morgan City, Patterson, Zcta 705xx.
What state is St. Mary County in?
St. Mary County is located in Louisiana (LA).
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.