Geography of San Augustine County
San Augustine County sits at roughly 31.39° N and 94.17° W in the East Texas region of Texas, spanning 528 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 San Augustine, and the county shares boundaries with 5 neighboring counties.
Population & demographics
With approximately 7,722 residents across 528 square miles, San Augustine County has a population density of about 14.6 people per square mile. Like much of West and South Texas, the county is sparsely populated, with wide-open country between settlements.
County seat: San Augustine
San Augustine serves as the seat of government for San Augustine 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
San Augustine County was established in 1836 and was named for Presumably Augustine of Hippo (354–430). It was carved from territory previously part of One of the original 23 counties.
San Augustine County, Texas — frequently asked questions
Quick answers about San Augustine 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 San Augustine County, Texas located?+
San Augustine County is located in the East Texas region of Texas at approximately 31.394° N, 94.168° W. It is one of the 254 counties of Texas and carries U.S. Census FIPS code 48405. The interactive map on this page renders the official U.S. Census TIGER boundary for San Augustine County over real-world OpenStreetMap, Esri satellite, and topographic basemaps.
How big is San Augustine County in square miles?+
San Augustine County covers approximately 528 square miles of land in the East Texas region — a compact county by Texas standards. By land area it ranks 236th 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 San Augustine County, Texas?+
San Augustine County has a population of approximately 7,722 residents. With 528 square miles of land, that works out to a population density of about 14.6 people per square mile, which is rural for a Texas county. That makes San Augustine County the 178th most populous of the 254 counties in Texas.
What is the county seat of San Augustine County?+
San Augustine is the county seat of San Augustine County, Texas, which was organized in 1836 and named for Presumably Augustine of Hippo (354–430). San Augustine County was originally carved out of One of the original 23 counties. County government offices, courthouses, and most public records for San Augustine County are located in San Augustine.
Which Texas counties border San Augustine County?+
San Augustine County shares borders with Jasper, Nacogdoches, Shelby, Angelina, and Sabine counties. These 5 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 East Texas region.
Where can I download or print a map of San Augustine County?+
A free, print-ready PDF map of San Augustine 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 San Augustine 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 San Augustine County, Texas?+
The full 5-digit U.S. Census FIPS code for San Augustine County is 48405, made up of Texas state code 48 and the 3-digit county code 405. 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.