Geography of Atascosa County
Covering 1,232 square miles, Atascosa County combines a regional trade center at Jourdanton with farm and ranch land in every direction. About 53,590 people live here.
It lies in the South Texas region at about 28.89° N, 98.53° W and is 38th in size among Texas's 254 counties. Atascosa County shares boundaries with 8 other Texas counties, and the closest major cities are San Antonio (about 36 miles away in a straight line) and Victoria (about 93 miles).
South Texas covers the brush country, the Rio Grande Valley and the ranchlands south of San Antonio. Its culture is strongly shaped by its Tejano heritage and its ties to Mexico, and its economy blends citrus and vegetable farming, ranching, trade and energy.
For a broader view of how Atascosa County fits within the state, download our free Texas map with counties and cities PDF — a printable, high-resolution reference showing all 254 Texas counties labeled with their county seats.
Population & demographics
With approximately 53,590 residents across 1,232 square miles, Atascosa County has a population density of about 43.5 people per square mile. Like much of West and South Texas, the county is sparsely populated, with wide-open country between settlements.
County seat: Jourdanton
Jourdanton is the county seat of Atascosa County. This is where the county courthouse stands and where residents go for property records, vehicle registration, marriage licenses, court cases and voter services handled by the county clerk, district clerk and tax assessor-collector. Jourdanton also serves as the main shopping, school and healthcare center for much of the county.
History & name origin
Atascosa County was established in 1856 and was named for The Spanish word for "boggy". It was carved from territory previously part of Bexar County.
Atascosa County, Texas — frequently asked questions
Quick answers about Atascosa County geography, population, county seat, neighboring counties, and how to use the maps on this page. Figures are sourced from the U.S. Census Bureau; answers are written and reviewed by the Texas County Map team.
Where is Atascosa County, Texas located?+
Atascosa County is located in the South Texas region of Texas at approximately 28.893° N, 98.527° W. It is one of the 254 counties of Texas and carries U.S. Census FIPS code 48013. The interactive map on this page renders the official U.S. Census TIGER boundary for Atascosa County over real-world OpenStreetMap, Esri satellite, and topographic basemaps.
How big is Atascosa County in square miles?+
Atascosa County covers approximately 1,232 square miles of land in the South Texas region — a mid-sized Texas county. By land area it ranks 38th out of 254 Texas counties. The full bounding box of the county is rendered to scale on the interactive map and matches the U.S. Census TIGER 2023 polygon.
What is the population of Atascosa County, Texas?+
Atascosa County has a population of approximately 53,590 residents. With 1,232 square miles of land, that works out to a population density of about 43.5 people per square mile, which is rural for a Texas county. That makes Atascosa County the 70th most populous of the 254 counties in Texas.
What is the county seat of Atascosa County?+
Jourdanton is the county seat of Atascosa County, Texas, which was organized in 1856 and named for The Spanish word for "boggy". Atascosa County was originally carved out of Bexar County. County government offices, courthouses, and most public records for Atascosa County are located in Jourdanton.
Which Texas counties border Atascosa County?+
Atascosa County shares borders with McMullen, Bexar, Karnes, La Salle, Live Oak, Medina, Wilson, and Frio counties. These 8 neighboring counties are highlighted on the schematic boundary map and linked at the bottom of this page so you can quickly compare population, area, and county seats across the South Texas region.
Where can I download or print a map of Atascosa County?+
Use the "Download PDF" button below the Atascosa County map on this page to save a letter-size PDF of the county boundary, neighboring counties and incorporated places, drawn from U.S. Census Bureau 2023 boundary files. The "Official TxDOT road map" button downloads the Texas Department of Transportation county road mapbook for Atascosa County. Both files are stored on this site and download directly. Our free Texas map with counties and cities PDF shows all 254 counties on one sheet.
What is the FIPS code for Atascosa County, Texas?+
The full 5-digit U.S. Census FIPS code for Atascosa County is 48013, made up of Texas state code 48 and the 3-digit county code 013. This is the same FIPS code used by the U.S. Census Bureau TIGER/Line files, the American Community Survey, and most federal datasets that key on county.