The Ozarks are in the United States.
Arkansas ( [ ˈɑrkənsɔː ] ) is a state located in the southeastern region of the United States . Kansas [ ˈkænzəs ] is a U.S. state in the Midwestern United States . Missouri ( see pronunciations ) is a state in the Midwestern region of the United States , achieving statehood in 1821 . The Ozarks , also referred to as the Ozark Mountains , Ozarks Mountain Country , and the Ozark Plateau , is a physiographic and geologic highland region of the central United States , primarily in Arkansas , Missouri , and Oklahoma . In Arkansas , a large portion is contained within the northwestern and northcentral region .