Oklahoma is a state located in the South Central region of the United States of America. The state's name is derived from the Choctaw words okla and humma, meaning "red people", and is known informally by its nickname, ''The Sooner State''. With small mountain ranges, prairie, mesas, and eastern forests, most of Oklahoma lies in the Great Plains, Cross Timbers and the U.S. Interior Highlands—a region especially prone to severe weather. In addition to having a prevalence of English, German, Scottish, Scotch-Irish, and Native American ancestry, more than 25 Native American languages are spoken in Oklahoma, second only to California.

Oklahoma is located on a confluence of three major American cultural regions and historically served as a route for cattle drives, a destination for southern settlers, and a government-sanctioned territory for Native Americans.