Newcastle is a city in McClain County, Oklahoma, United States, and part of the Oklahoma City Metropolitan Area. The population was 10,984 at the 2020 census.
Children on playground at Pleasant Hill School in 1914. Newcastle, Oklahoma
McClain County is a county located in south central Oklahoma. As of the 2020 census, the population was 41,662. Its county seat is Purcell. The county was named for Charles M. McClain, an Oklahoma constitutional convention attendee.
McClain County Courthouse