COUNTY · FL
Collier County, Florida
Collier County is a county in Florida with FIPS code 12021 and an estimated population of 404,310 (Census 2023), 19th largest of 67 in the state.
County facts
- Name
- Collier County
- State
- Florida
- Type
- county
- FIPS code
- 12021
- State FIPS
- 12
- Population (2023)
- 404,310
- Change since 2020
- +7.2%
- State rank
- 19 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Collier County
Other counties in Florida
Questions
What is the FIPS code for Collier County?
Collier County, Florida has the five-digit FIPS code 12021: 12 for the state and 021 for the county.
What state is Collier County in?
Collier 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.