County · code 48031
Blanco CountyTexas
Blanco County is a county in Texas, with its seat in Johnson City. The county was formed on February 12, 1858.
- Founded1858
- County seatJohnson City
- Named forBlanco River
- Land area709 sq mi + 4.2 sq mi water
- Population11,374 2020 Census
- Parcels mapped14,661 checked 15 October 2026
Where it is
Blanco on the map of Texas
Texas has 254 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1858 from Burnet County, Comal County, Gillespie County, Hays County and Kerr County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Blanco County was created from Burnet, Comal, Gillespie, Hays, and Kerr counties, and was named after the Blanco River. The county was initially created on February 12, 1858, but not fully organized until April 12, 1858. In 1862, Blanco County gained territory from Hays County when Kendall County was created.
- 1858Blanco County created Blanco created from Burnet, Comal, Gillespie, Hays, Kerr, all of Non-County Area 14, and all of Non-County Area 20; Blanco not fully organized. · Texas Laws 1857, 7th leg., ch. 130/pp. 198-200
- 1858Changed Blanco fully organized. · Moursund, 127
- 1862Gained territory Blanco gained from Hays, lost to creation of Kendall. · Texas Laws 1861, 9th leg., reg. sess., chs. 38-39/pp. 32-33
Land and parcels
What the maps cover in Blanco
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 14,661 parcels from Blanco County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026 -
Address points Official
One point per address, 8,483 in all from Texas Geographic Information Office (TxGIO, formerly TNRIS), a division of the Texas Water Development Board; StratMap program.
checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Blanco by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Blanco County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Blanco County.
See your own lot on these maps
Open Blanco County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Blanco County
- When was Blanco County founded?
- Blanco County was founded in 1858, formed from Burnet County, Comal County, Gillespie County, Hays County and Kerr County, and named after Blanco River.
- What is the county seat of Blanco County?
- The county seat of Blanco County is Johnson City.
- Is there an online parcel map for Blanco County?
- Yes. Blanco County publishes a parcel map of 14,661 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Blanco County's boundary or name changed?
- Blanco County was created in 1858 from Burnet County, Comal County, Gillespie County, Hays County and Kerr County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Hays County and Kendall County.
- Is my lot in a flood zone?
- We do not have flood maps for Blanco County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby