The Ozarks exist in the United States.
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 . The Ozarks cover a significant portion of southern Missouri , extending as far northeast as the southwestern suburbs of St. Louis . Much smaller pieces of the Ozarks extend westward into northeastern Oklahoma and extreme southeastern Kansas . Together , the Ozarks and Ouachita Mountains form an area known as the U.S. Interior Highlands , and are sometimes referred to collectively .