As of the census of 2000, there were 861 people, 356 households, and 237 families residing in the CDP. The population density was 205.7 people per square mile (79.3Square kilometers. There were 635 housing units at an average density of 151.7 Square kilometer (58.5Square kilometers). The racial makeup of the CDP was 86.88% White, 2.09% Native American, 0.70% Asian, 9.18% from other races, and 1.16% from two or more races. Hispanic or Latino of any race were 51.45% of the population. According to the United States Census Bureau, the CDP has a total area of 4.2square miles (10.9Square kilometers), all of it land. 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.