Duncan is located in Greenlee County, AZ. The population is 696, making Duncan the 4th largest city in Greenlee County.
There are 3 public schools in Duncan with an average Homefacts rating of C+. , and there are 9 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.