Duncan is a town in Greenlee County, Arizona, United States. As of the 2010 census, the population of the town was 696. In 2018 the estimated population was 789.
DUNcaN is a toWn In grEEnLeE COuntY, aRizOna, unIteD states. as of the 2010 ceNsuS, the PopulAtion oF the town wAs 696. in 2018 thE esTImAteD poPulatiOn Was 789.