COUNTY · FL
St. Lucie County, Florida
St. Lucie County is a county in Florida with FIPS code 12111 and an estimated population of 373,586 (Census 2023), 20th largest of 67 in the state.
County facts
- Name
- St. Lucie County
- State
- Florida
- Type
- county
- FIPS code
- 12111
- State FIPS
- 12
- Population (2023)
- 373,586
- Change since 2020
- +12.7%
- State rank
- 20 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for St. Lucie County?
St. Lucie County, Florida has the five-digit FIPS code 12111: 12 for the state and 111 for the county.
What state is St. Lucie County in?
St. Lucie County is in Florida.
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.