St. Mary Parish, Louisiana
St. Mary Parish, Louisiana, has 46,552 residents (July 2025 estimate). Its county seat is Franklin. It uses Central Time and covers 559 sq mi (1,447 km²) of land. It is a county equivalent (parish).
- Resident population, July 2025
- 46,552
- Land area
- 559 sq mi (1,447 km²)
- County seat or government
- Franklin
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $52,576 ± $3,030
- Median home value
- $138,900 ± $8,393
- Median rent, with utilities
- $848 ± $36
- Homes lived in by their owners
- 68.6% ± 2.5 points
- County type
- Parish
- Metro or micro area
- Morgan City, LA micro areaCentral parish
- Water area
- 561 sq mi (1,453 km²)
- State
- Louisiana
- County code (FIPS)
- 22101
- Coordinates (central point)
- 29.629349, -91.463804
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in St. Mary Parish
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 7038020,529 people
- 7053812,464 people
- 7054410,269 people
- 703928,173 people
- 703424,607 people
- 705141,914 people
- 70522495 people
- 70523476 people
- 703400 people
9 ZIP Code areas overlap St. Mary Parish. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in St. Mary Parish, largest first
- St. Mary Parish School District47,828 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Tribal areas in St. Mary Parish, largest first
- United Houma Nation State Designated Tribal Statistical Area186,351 people
- Chitimacha Reservation878 people
American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Morgan City, Louisiana (city)11,064 people
- Franklin, Louisiana (city)6,461 people
- Patterson, Louisiana (city)5,744 people
- Berwick, Louisiana (town)4,607 people
- Bayou Vista, Louisiana (CDP)3,842 people
- Baldwin, Louisiana (town)1,962 people
- Amelia, Louisiana (CDP)1,712 people
- Charenton, Louisiana (CDP)1,440 people
- Centerville, Louisiana (CDP)685 people
- Sorrel, Louisiana (CDP)564 people
- Siracusaville, Louisiana (CDP)515 people
- Glencoe, Louisiana (CDP)144 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Iberia Parish, Louisiana23 mi west
- Assumption Parish, Louisiana30 mi northeast
- St. Martin Parish, Louisiana35 mi north
- Terrebonne Parish, Louisiana43 mi southeast
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.