Austin County, Texas
County seat: Bellville · Population 33,625 (2025) · 647 sq mi
Austin County is the 89th most populous of Texas's 254 counties, with 33,625 people (2025 estimate). Its county seat is Bellville. It is part of the Gulf Coast region, one of the 12 Texas Comptroller economic regions. The map shows its 7 cities and towns and the 6 neighboring counties.
Austin County facts
- County seat
- Bellville
- Population (2025 estimate)
- 33,625 +11.5% since 2020
- Land area
- 647 sq mi 224th largest of 254
- Water area
- 10 sq mi
- Population density
- 52 per sq mi
- Established
- 1836
- Named after
- Stephen F. Austin American empresario, founder of Texas, namesake of Austin, Texas (1793-1836)
- Largest city
- Sealy 7,937
- Median household income
- $75,789
- Cities and towns
- 7 plus 1 CDPs
- ZIP codes
- 13
- Time zone
- Central
- FIPS code
- 48015
Cities and towns in Austin County
Austin County has 7 incorporated cities, towns and villages. Populations count the people living inside Austin County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Sealy | City | 7,937 | |
| Bellville (county seat) | City | 4,379 | |
| Wallis | City | 1,372 | |
| San Felipe | Town | 739 | |
| Brazos Country | City | 537 | |
| Industry | City | 298 | |
| South Frydek | City | 237 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| New Ulm | 185 |
ZIP codes in Austin County
13 ZIP codes reach into Austin County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 77418
- 77426 also Washington County
- 77473
- 77474 also Colorado County
- 77485 also Fort Bend County
- 77833 also Washington County
- 77835 also Washington County
- 78931
- 78933 also Colorado County
- 78940 also Fayette and Colorado counties
- 78944
- 78950 also Colorado and Fayette counties
- 78954 also Fayette County
Population of Austin County, 2020–2025
Austin County grew by 3,457 people (+11.5%) between April 2020 and July 2025: 141 more births than deaths and a net gain of 3,297 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 30,133 |
| 2021 | 30,435 |
| 2022 | 31,110 |
| 2023 | 31,772 |
| 2024 | 32,878 |
| 2025 | 33,625 |
Neighboring counties
- Waller County northeast · 69,858 people
- Colorado County southwest · 21,439 people
- Washington County north · 38,288 people
- Fort Bend County southeast · 975,191 people
- Wharton County south · 42,060 people
- Fayette County west · 25,459 people
Printable Austin County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (154 KB)
- PNG (2400 px) (93 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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