Geography of Knox County
Knox County sits at roughly 33.61° N and 99.74° W in the North Texas region of Texas, spanning 854 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 Benjamin, and the county shares boundaries with 4 neighboring counties.
Population & demographics
With approximately 3,192 residents across 854 square miles, Knox County has a population density of about 3.7 people per square mile. Like much of West and South Texas, the county is sparsely populated, with wide-open country between settlements.
County seat: Benjamin
Benjamin serves as the seat of government for Knox 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
Knox County was established in 1858 and was named for Henry Knox, the first secretary of war of the United States (1785–1794). It was carved from territory previously part of Bexar County.
Knox County, Texas — frequently asked questions
Quick answers about Knox 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 Knox County, Texas located?+
Knox County is located in the North Texas region of Texas at approximately 33.606° N, 99.741° W. It is one of the 254 counties of Texas and carries U.S. Census FIPS code 48275. The interactive map on this page renders the official U.S. Census TIGER boundary for Knox County over real-world OpenStreetMap, Esri satellite, and topographic basemaps.
How big is Knox County in square miles?+
Knox County covers approximately 854 square miles of land in the North Texas region — a mid-sized Texas county. By land area it ranks 184th 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 Knox County, Texas?+
Knox County has a population of approximately 3,192 residents. With 854 square miles of land, that works out to a population density of about 3.7 people per square mile, which is sparsely populated for a Texas county. That makes Knox County the 218th most populous of the 254 counties in Texas.
What is the county seat of Knox County?+
Benjamin is the county seat of Knox County, Texas, which was organized in 1858 and named for Henry Knox, the first secretary of war of the United States (1785–1794). Knox County was originally carved out of Bexar County. County government offices, courthouses, and most public records for Knox County are located in Benjamin.
Which Texas counties border Knox County?+
Knox County shares borders with King, Haskell, Baylor, and Foard counties. These 4 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 North Texas region.
Where can I download or print a map of Knox County?+
A free, print-ready PDF map of Knox 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 Knox 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 Knox County, Texas?+
The full 5-digit U.S. Census FIPS code for Knox County is 48275, made up of Texas state code 48 and the 3-digit county code 275. 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.