Blanchard is a city in McClain and Grady counties in the U.S. state of Oklahoma. The population was 8,879 at the 2020 census, up from 7,670 at the 2010 census. Blanchard is part of a rapidly growing area of northern McClain and Grady counties known as the "Tri-City Area" with Newcastle and Tuttle.

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.