Marshall County lies in south-central Oklahoma and was created shortly after statehood on 7th November 1907. Its county seat is Madill with other cities such as Ardmore, Kingston and Tishomingo bending its 4100 km² (1581 sq mi) landscape.. In 2019 an estimated 15 844 people called Marshall home according to figures taken by the United States Census Bureau estimates; making it one of the more densely populated counties operating within Oklahomas's boundaries.