The Texoma region consists of eight counties, five of which are in Oklahoma and three of which are in Texas. in Oklahoma Bryan County, Oklahoma Carter County, Oklahoma Johnston County, Oklahoma Love County, Oklahoma Marshall County, Oklahoma in Texas Cooke County, Texas Fannin County, Texas Grayson County, Texas Some of the counties are included in Texoma's one metropolitan area and three micropolitan areas. In each case, the metro- or micropolitan area corresponds to a single county. Ardmore USA, covering Carter County. Durant USA, covering Bryan County. Gainesville USA, covering Cooke County. Sherman–Denison MSA, covering Grayson County. See also Big Pasture Choctaw Nation of Oklahoma, which has its headquarters in Durant, Oklahoma East Texas Eisenhower State Park Greer County, Texas, now defunct county and site of a 19th-century state boundary dispute Choctaw (Kiamichi) Country and Little Dixie, often considered interchangeable North Texas Northeast Texas Piney Woods South Central Oklahoma Southwestern Oklahoma Texoma Council of Governments Tishomingo National Wildlife Refuge Washita River References External links Regions of Oklahoma Regions of Texas