Startex is a census-designated place in Spartanburg County, South Carolina, United States. The population was 859 at the 2010 census.Startex is located at 34°55′54″N 82°5′55″W / 34.93167°N 82.09861°W / 34.93167; -82.09861.According to the United States Census Bureau, the CDP has a total area of 1.9 square miles, all land.As of the census of 2000, there were 988 people, 391 households, and 265 families residing in the CDP. The population density was 516.1 people per square mile. There were 443 housing units at an average density of 231.4/sq mi. The racial makeup of the CDP was 87.55% White, 11.54% African American, 0.40% Asian, 0.51% from other races. Hispanic or Latino of any race were 2.13% of the population.There were 391 households out of which 29.2% had children under the age of 18 living with them, 49.4% were married couples living together, 11.3% had a female householder with no husband present, and 32.2% were non-families. 28.