Wichita Falls is a town in and county seat of Wichita County, Texas, U.S. It is the main city of the Metropolitan Statistical Area of Wichita Falls, which includes the counties of Archer, Clay, and Wichita. It has a population of over 104,000 which makes it the 38th most populous Texas city. Moreover, the central business district is close to Sheppard Air Force Base, home to the largest technical training wing of the Air Force and the Euro-NATO Joint Jet Pilot Training programme, the only multi-staffed and operated flight training program in the world. Wichita Falls sits about 15 miles south of the Oklahoma border. Wichita Falls has 70 miles of total surface area.