Geography of Atascosa County
Atascosa County sits at roughly 28.89° N and 98.53° W in the South Texas region of Texas, spanning 1,232 square miles of terrain that includes the landscape characteristic of the area — from open ranchland and farmland to small-town main streets. The county's centroid is near Jourdanton, and the county shares boundaries with 8 neighboring counties.
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 serves as the seat of government for Atascosa County. The county courthouse, commissioners court, district clerk, and primary public records are located here. As with all 254 Texas counties, the county seat is the anchor of civic life and the principal address for elections, permits, and court filings.
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. Every answer is generated from the official U.S. Census data backing this site.
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?+
A free, print-ready PDF map of Atascosa County is available from the "Download PDF" button at the top of this page. The printable layout uses authentic U.S. Census TIGER boundary geometry for Atascosa County, includes a Texas locator inset, and is sized for standard 8.5" × 11" Letter paper. For interactive use, the live Leaflet map on this page supports OpenStreetMap, Esri satellite, Esri topographic, and Carto light basemaps with zoom, scale bar, and fullscreen.
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.