McClain County, Oklahoma

McClain County is a county located in south central Oklahoma. As of the 2010 census, the population was 34,506. Its county seat is Purcell. The county was named for Charles M. McClain, an Oklahoma constitutional convention attendee.McClain County is part of the Oklahoma City, OK Metropolitan Statistical Area.HistoryThe Chickasaw tribe began moving into this area in 1837, when the land had already been assigned to the Choctaws by the U.S. government. In 1855, the area became part of the Chickasaw Nation, after the two tribes officially separated. The present McClain County became part of Pontotoc County, Chickasaw Nation and remained such until Oklahoma attained statehood. Few Chickasaws lived here because of hostilities with western tribes (e.g., Kiowa). Major Richard Mason established Camp Holmes (also called Camp Mason) in 1835, near the present city of Lexington, while negotiating a treaty between the western tribes and the newly arrived Choctaws. Federal troops abandoned the camp in August 1835, after the Treaty of Camp Holmes was signed.Auguste Pierre Chouteau built a trading post at the Camp Holmes site, but it closed after Chouteau died in 1838. Randolph Marcy is credited with bringing the California Road through this area in 1849. The U.S. Army built Camp Arbuckle in 1850 to protect the road, but the troops were withdrawn to what is now Garvin County, Oklahoma in the following year.