Duncan is located in Spartanburg County, SC. The population is 3,173, making Duncan the 9th largest city in Spartanburg County.
There are 7 public schools in Duncan with an average Homefacts rating of B+. The total crime rate for Duncan is very low , and there are 0 registered sex offenders residing in the city. Unemployment in Duncan is moderate and the median home sales price is $0. Detailed and up-to-date Duncan property reports are available for any property address.