Duncan

Duncan kan være:

Byer i USA
 Duncan (Alabama), i Tallapoosa County
 Duncan (Arizona), i Greenlee County
 Duncan (Arkansas), i Monroe County
 Duncan (Colorado), i Saguache County
 Duncan (Illinois), i Stark County
 Duncan (Indiana), i Floyd County
 Duncan (Iowa), i Hancock County
 Duncan (Kentucky), i Casey County
 Duncan (Kentucky), i Mercer County
 Duncan (Mississippi), i Bolivar County
 Duncan (Missouri), i Webster County
 Duncan (Montana), i Flathead County
 Duncan (Nebraska), i Platte County
 Duncan (Nord-Carolina), i Harnett County
 Duncan (Oklahoma), i Stephens County
 Duncan (Oregon), i Umatilla County
 Duncan (Pennsylvania), i Tioga County
 Duncan (Sør-Carolina), i Spartanburg County
 Duncan (Tennessee), i Blount County
 Duncan (Virginia), i Floyd County
 Duncan (Washington), i Spokane County
 Duncan (Vest-Virginia), i Jackson County