Sanderson is a census-designated place (CDP) in and the county seat of Terrell County, Texas, United States. The population was 861 at the 2000 census. Sanderson was created in 1882 as a part of neighboring Pecos County. It became the seat of Terrell County in 1905.
Sanderson is located at 30°8′28″N 102°23′45″W / 30.14111°N 102.39583°W / 30.14111; -102.39583 (30.141024, -102.395924).
According to the United States Census Bureau, the CDP has a total area of 4.2 square miles (10.9 km²), all of it land.