McClain County is located in the state of Oklahoma, in the central part of the United States. It was established in 1907 and is named after Charles McClain, a prominent figure in the area. The county seat is Purcell, which serves as the main hub for government and community activities. The county covers an area of approximately 1,000 square miles and is known for its diverse landscapes, including rolling hills and agricultural land. McClain County is part of the Oklahoma City metropolitan area, providing residents with access to urban amenities while maintaining a rural charm.