PARISH · LA
St. Mary Parish, Louisiana
St. Mary Parish is a parish in Louisiana with FIPS code 22101 and an estimated population of 47,055 (Census 2023), 23rd largest of 64 in the state.
County facts
- Name
- St. Mary Parish
- State
- Louisiana
- Type
- parish
- FIPS code
- 22101
- State FIPS
- 22
- Population (2023)
- 47,055
- Change since 2020
- -4.2%
- State rank
- 23 of 64
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for St. Mary Parish?
St. Mary Parish, Louisiana has the five-digit FIPS code 22101: 22 for the state and 101 for the county.
What state is St. Mary Parish in?
St. Mary Parish is in Louisiana.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.