where is duncan sc
Duncan is a town in Spartanburg County, South Carolina, United States. The population was 3,181 at the 2010 census. Duncan is located at 34Â°56â²6â³N 82Â°8â²5â³W / 34.935Â°N 82.13472Â°W / 34.935; -82.13472 (34.934983, -82.134801). According to the United States Census Bureau, the town has a total area of 3.5 square miles (9.1 kmÂ²), all of it land.