Wichita County is a county located in the U.S. state of Kansas. Its county seat is Leoti. As of the 2020 census, the county population was 2,152. The county was named after the Wichita tribe. For many millennia, the Great Plains of North America was inhabited by nomadic Native Americans. From the 16th century to 18th century, the Kingdom of France claime…Wichita County is a county located in the U.S. state of Kansas. Its county seat is Leoti. As of the 2020 census, the county population was 2,152. The county was named after the Wichita tribe. For many millennia, the Great Plains of North America was inhabited by nomadic Native Americans. From the 16th century to 18th century, the Kingdom of France claimed ownership of large parts of North America. In 1762, after the French and Indian War, France secretly ceded New France to Spain, in accordance with the Treaty of Fontainebleau.