CITY · TX

What county is San Antonio, TX in?

San Antonio, TX is mostly in Bexar County. County FIPS code 48029, population 2,087,679 (2023 estimate).

County details

City: San Antonio, Texas
Primary county: Bexar County
FIPS code: 48029
County population: 2,087,679

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

Questions

What county is San Antonio in?

San Antonio, TX is mostly in Bexar County.

What is the county seat of Bexar 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.