Blanco County, Texas
County seat: Johnson City · Population 13,581 (2025) · 709 sq mi
Blanco County is the 147th most populous of Texas's 254 counties, with 13,581 people (2025 estimate). Its county seat is Johnson City. It is part of the Capital region, one of the 12 Texas Comptroller economic regions. The map shows its 3 cities and towns and the 7 neighboring counties.
Blanco County facts
- County seat
- Johnson City
- Population (2025 estimate)
- 13,581 +19.4% since 2020
- Land area
- 709 sq mi 213th largest of 254
- Water area
- 4 sq mi
- Population density
- 19 per sq mi
- Established
- 1858
- Named after
- Blanco River river in the Hill Country of Texas, United States
- Largest city
- Johnson City 2,127
- Median household income
- $92,425
- Cities and towns
- 3
- ZIP codes
- 8
- Time zone
- Central
- FIPS code
- 48031
Cities and towns in Blanco County
Blanco County has 3 incorporated cities, towns and villages. Populations count the people living inside Blanco County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Johnson City (county seat) | City | 2,127 | |
| Blanco | City | 2,108 | |
| Round Mountain | Town | 109 |
ZIP codes in Blanco County
8 ZIP codes reach into Blanco County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 78070 also Comal and Kendall counties
- 78606 also Kendall and Comal counties
- 78620 also Hays and Travis counties
- 78635
- 78636
- 78663 also Travis, Hays and Burnet counties
- 78669 also Travis and Burnet counties
- 78676 also Hays and Comal counties
Population of Blanco County, 2020–2025
Blanco County grew by 2,203 people (+19.4%) between April 2020 and July 2025: 199 more deaths than births and a net gain of 2,383 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 11,451 |
| 2021 | 11,877 |
| 2022 | 12,417 |
| 2023 | 13,067 |
| 2024 | 13,395 |
| 2025 | 13,581 |
Neighboring counties
- Gillespie County west · 28,527 people
- Hays County southeast · 304,390 people
- Kendall County southwest · 53,289 people
- Llano County northwest · 23,353 people
- Burnet County north · 57,015 people
- Comal County south · 209,166 people
- Travis County east · 1,389,670 people
Printable Blanco 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) (127 KB)
- PNG (2400 px) (82 KB)
Paste this code to embed the map on your site:
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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