COUNTY · AL
Jefferson County, Alabama
Jefferson County is a county in Alabama with FIPS code 01073 and an estimated population of 662,895 (Census 2023), 1st largest of 67 in the state.
County facts
- Name
- Jefferson County
- State
- Alabama
- Type
- county
- FIPS code
- 01073
- State FIPS
- 01
- Population (2023)
- 662,895
- Change since 2020
- -1.8%
- State rank
- 1 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Jefferson County
Other counties in Alabama
Questions
What is the FIPS code for Jefferson County?
Jefferson County, Alabama has the five-digit FIPS code 01073: 01 for the state and 073 for the county.
What state is Jefferson County in?
Jefferson County is in Alabama.
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.