Geography of Tom Green County
Tom Green County is built around San Angelo and a handful of smaller towns, with about 120,602 residents across 1,522 square miles of mixed town and countryside.
It lies in the Central Texas region at about 31.40° N, 100.46° W and is one of the 25 largest counties in Texas (17th of 254). Tom Green County shares boundaries with 7 other Texas counties, and the closest major cities are San Angelo (about 4 miles away in a straight line) and Abilene (about 84 miles).
Central Texas stretches across the Hill Country, the Blackland Prairie and the Cross Timbers. It includes some of the fastest-growing suburbs in the nation along the I-35 corridor, alongside quiet ranching counties with limestone creeks and live-oak savanna.
For a broader view of how Tom Green 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 120,602 residents across 1,522 square miles, Tom Green County has a population density of about 79.2 people per square mile. Density here reflects a mix of small cities, suburbs, and rural land.
County seat: San Angelo
County government for Tom Green County is based in San Angelo. The commissioners court, made up of a county judge and four precinct commissioners, meets here and sets the county budget, roads policy and tax rate. San Angelo also serves as the main shopping, school and healthcare center for much of the county.
History & name origin
Tom Green County was established in 1874 and was named for Thomas Green (1814–1864), a Confederate brigadier general. It was carved from territory previously part of Bexar County.
Tom Green County, Texas — frequently asked questions
Quick answers about Tom Green 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 Tom Green County, Texas located?+
Tom Green County is located in the Central Texas region of Texas at approximately 31.404° N, 100.462° W. It is one of the 254 counties of Texas and carries U.S. Census FIPS code 48451. The interactive map on this page renders the official U.S. Census TIGER boundary for Tom Green County over real-world OpenStreetMap, Esri satellite, and topographic basemaps.
How big is Tom Green County in square miles?+
Tom Green County covers approximately 1,522 square miles of land in the Central Texas region — a large county by Texas standards. By land area it ranks 17th 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 Tom Green County, Texas?+
Tom Green County has a population of approximately 120,602 residents. With 1,522 square miles of land, that works out to a population density of about 79.2 people per square mile, which is moderately populated for a Texas county. That makes Tom Green County the 41st most populous of the 254 counties in Texas.
What is the county seat of Tom Green County?+
San Angelo is the county seat of Tom Green County, Texas, which was organized in 1874 and named for Thomas Green (1814–1864), a Confederate brigadier general. Tom Green County was originally carved out of Bexar County. County government offices, courthouses, and most public records for Tom Green County are located in San Angelo.
Which Texas counties border Tom Green County?+
Tom Green County shares borders with Irion, Reagan, Schleicher, Sterling, Runnels, Coke, and Concho counties. These 7 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 Central Texas region.
Where can I download or print a map of Tom Green County?+
Use the "Download PDF" button below the Tom Green 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 Tom Green 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 Tom Green County, Texas?+
The full 5-digit U.S. Census FIPS code for Tom Green County is 48451, made up of Texas state code 48 and the 3-digit county code 451. 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.