Main city: Duncan
Timezone: (UTC-7)
Phone type: Landline
Operator: Copper Valley Telephone

Duncan, a town in Greenlee County, Arizona, United States. According to 2006 Census Bureau estimates, the population of the town is 713. It is part of the Safford Micropolitan Statistical Area. Duncan is at the juncture of the Gila River and the Arizona-New Mexico state border. Duncan lies on both sides of the Gila, although the primary portion of the town and the entire downtown area lie on the south side of the river. Duncan was founded in the mid 19th century, and the land was added to the United States as a part of the Mexican Cession. The town of Duncan has been destroyed twice by flood and once by fire. The town and area are primarily populated by ranchers and miners (especially from the Freeport-McMoran copper mines in SE Arizona and SW New Mexico). Surrounding smaller towns such as Franklin & York, Arizona and Virden, New Mexico use Duncan public works and public schools. Duncan and the surrounding area along the Gila River is world-renowned for Native American artifacts such as arrow heads, pottery, burial sites, cave paintings and other remnants of the Anasazi and other pre-historic cultures, as well as artifacts from garrison camps of the Expedition of Francisco Vásquez de Coronado. ^source

North American area code 928 is a telephone area code in the state of Arizona that was created in a split from area code 520 on June 23, 2001, due mainly to population gains in Tucson, Yuma and Flagstaff. 928 covers northern, eastern, and western portions of Arizona. The area code encompasses areas such as the Grand Canyon, Flagstaff, Lake Havasu City, Kingman, Prescott, Wickenburg, and Yuma, also serving the majority of Greenlee County. The Arizona portion of the Navajo Nation is served by the 928 area code. Some areas on the western and northern fringes of the Phoenix metropolitan area such as Lake Pleasant Regional Park in Peoria also fall within this area code. ^source