COUNTY · FL
Polk County, Florida
Polk County is a county in Florida with FIPS code 12105 and an estimated population of 818,330 (Census 2023), 9th largest of 67 in the state.
County facts
- Name
- Polk County
- State
- Florida
- Type
- county
- FIPS code
- 12105
- State FIPS
- 12
- Population (2023)
- 818,330
- Change since 2020
- +12.1%
- State rank
- 9 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Polk County?
Polk County, Florida has the five-digit FIPS code 12105: 12 for the state and 105 for the county.
What state is Polk County in?
Polk 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.