County · code 48013
Atascosa CountyTexas
Atascosa County is a county in Texas, with its seat in Jourdanton. The county was created on January 25, 1856, from Bexar County and named after the Atascosa River.
- Founded1856
- County seatJourdanton
- Named forAtascosa River, Texas
- Land area1,220 sq mi + 1.9 sq mi water
- Population48,981 2020 Census
- Parcels mapped36,693 checked 14 October 2026
Where it is
Atascosa 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 1856 from Bexar County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Atascosa County was created from Bexar County on January 25, 1856, but was not fully organized until August 4, 1856. The county was eliminated in 1862 when its territory was lost to Live Oak County, but was re-created on December 4, 1863, from Live Oak County. Frio County was created from Atascosa's territory in 1858 and was temporarily attached to Atascosa for judicial purposes at various times until 1870, when it was attached to Medina County instead.
- 1856Atascosa County created Atascosa created from Bexar; Atascosa not fully organized. · Texas Laws 1855, 6th leg., reg. sess., ch. 33/p. 25
- 1856Changed Atascosa fully organized. · TXGenWeb Project, Atascosa County, Texas; http://bsd.pastracks.com/states/texas/atascosa/; 11 December 2001
- 1858Gained territory Atascosa gained from Bexar Land District; lost to creation of Frio and McMullen. · Texas Laws 1857, 7th leg., ch. 75, secs. 6-7/p. 88
- 1860Changed Frio attached to Atascosa "for all judicial purposes." · Texas Laws 1859, 8th leg., reg. sess., gen., ch. 87, sec. 7/p. 120
- 1862Lost territory Atascosa lost all territory to Live Oak; Atascosa eliminated, temporarily ending the attachment of Frio (act repealed 4 December 1863). · Texas Laws 1861, 9th leg., reg. sess., ch. 29/p. 27
- 1863Atascosa County created Atascosa re-created from Live Oak; Frio again attached to Atascosa (repealed acts of 3 January 1862). · Texas Laws 1863, 10th leg., reg. sess., spec., ch. 8/p. 5
- 1870
Land and parcels
What the maps cover in Atascosa
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 36,693 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026 -
Address points Official
One point per address, 25,919 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
Atascosa 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
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Zoning and code
County government
- County government
The official website of Atascosa County.
See your own lot on these maps
Open Atascosa 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 Atascosa County
- When was Atascosa County founded?
- Atascosa County was founded in 1856, formed from Bexar County, and named after Atascosa River, Texas.
- What is the county seat of Atascosa County?
- The county seat of Atascosa County is Jourdanton.
- Is there an online parcel map for Atascosa County?
- Yes. A public source publishes a parcel map of 36,693 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Atascosa County's boundary or name changed?
- Atascosa County was created in 1856 from Bexar County. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Frio County, Live Oak County and McMullen County.
- Who issues building permits in Atascosa County?
- The county's page on building permits: Permits and Forms – Atascosa County. Inside a city or town, ask that city first.
- Who issues septic and well permits in Atascosa County?
- The county's page on septic systems and wells: Health department: septic and well.
- Is my lot in a flood zone?
- We do not have flood maps for Atascosa County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby