Johnston County, Oklahoma. Johnston County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 10,957. Its county seat is Tishomingo. It was established at statehood on November 16, 1907 and named for Douglas H. Johnston, a governor of the Chickasaw Nation. Johnston County is part of the Texoma Region.
Texas Health Physicians Group is a group practice with 219 locations. Currently, Texas Health Physicians Group's 720 physicians cover 56 specialty areas of medicine.
1 Request an Appointment Texas Oncology is ready to help you fight cancer. 2  Find a cancer center Texas Oncology has more than 175 treatment centers throughout Texas and southeastern Oklahoma. 3  Find a provider Texas Oncology is a group with more than 420 physicians focused on treating cancer and blood disorders.