Welcome             to Ellis County, Kansas Ellis County, Kansas, founded in 1867, is conveniently located midway between Denver, Colorado and Kansas City, Kansas in beautiful western Kansas.  Ellis County sprawls out over 900 square miles of wide-open prairie and golden wheat fields and has a population of approximately 27,000 friendly and welcoming people.  Nestled in the center of the 900 square mile county along Interstate-70 is the City of Hays.  Hays, the County Seat, offers many opportunities and attractions, including Historic Fort Hays, Ellis County Historical Society, Sternberg Museum, and many other features.  Whether your visiting, passing through or living in Ellis County, you’ll be sure to find something interesting!       Ellis County Courthouse 1204 Fort Street Hays, Kansas 67601 (785) 628-9410 8:00a.m. - 5:00p.m.; Monday - Friday