COUNTY · TX
Jefferson County, Texas
Jefferson County is a county in Texas with FIPS code 48245 and an estimated population of 251,496 (Census 2023), 22nd largest of 254 in the state.
County facts
- Name
- Jefferson County
- State
- Texas
- Type
- county
- FIPS code
- 48245
- State FIPS
- 48
- Population (2023)
- 251,496
- Change since 2020
- -1.8%
- State rank
- 22 of 254
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Jefferson County?
Jefferson County, Texas has the five-digit FIPS code 48245: 48 for the state and 245 for the county.
What state is Jefferson County in?
Jefferson County is in Texas.
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.