Duncan, city, seat of Stephens County, southern Oklahoma; incorporated as a city 1892. It is a commercial and manufacturing center for a petroleum, cattle, and agricultural area. Major manufactures include oil-field equipment, metal products, and clothing. Located here are a historical museum and the Simmons Center, a recreation and theater complex. The community developed around a trading post on the old Chisholm Trail, a major cattle-driving route. It is named for William Duncan, a trader who settled nearby in 1872. Population 22,517 (1980); 21,732 (1990); 22,505 (2000).Microsoft® Encarta® Online Encyclopedia 2001 http://encarta.msn.com © 1997-2001 Microsoft Corporation. All rights reserved. Duncan Information info Find out your Home's Value - Homes for Half Price
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