Marshall County is a county located on the south-central border of Oklahoma. As of the 2020 census, the population was 15,312. Its county seat is Madill. The county was created at statehood in 1907 fr
Johnston County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 10,272. Its county seat is Tishomingo. It was established at statehood on November 16, 1907