CITY · TX

What county is Austin, TX in?

Austin, TX is mostly in Travis County. County FIPS code 48453, population 1,334,961 (2023 estimate).

County details

City: Austin, Texas
Primary county: Travis County
FIPS code: 48453
County population: 1,334,961

Some cities extend into more than one county. Austin is placed in the county that contains its center. For a specific address, use the address lookup.

Questions

What county is Austin in?

Austin, TX is mostly in Travis County.

What is the county seat of Travis County?

County seats are not part of the data on this site. Check the county’s official website.

Can a city be in two counties?

Yes. Large cities such as Houston and Atlanta cross county lines. The address lookup shows the exact county for any street address.

Sources: U.S. Census Bureau geographic reference files; FCC Area API; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.