COUNTY · FL
Jefferson County, Florida
Jefferson County is a county in Florida with FIPS code 12065 and an estimated population of 15,450 (Census 2023), 61st largest of 67 in the state.
County facts
- Name
- Jefferson County
- State
- Florida
- Type
- county
- FIPS code
- 12065
- State FIPS
- 12
- Population (2023)
- 15,450
- Change since 2020
- +7.3%
- State rank
- 61 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Jefferson County?
Jefferson County, Florida has the five-digit FIPS code 12065: 12 for the state and 065 for the county.
What state is Jefferson County in?
Jefferson 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.