Wilmington is a city in and the county seat of Clinton County, Ohio, United States. The population was 12,520 at the 2010 census. At city entrances from state routes, county roads, and U.S. highways, the city slogan of "We Honor Our Champions" is seen, accompanied by signs that highlight various athletic accomplishments from Wilmington individuals and teams. The city is served by the Wilmington Public Library of Clinton County, and also features a weather forecast office of the National Weather Service, which serves all of Southwestern Ohio and portions of Kentucky and Indiana.
Wilmington was featured in Time magazine on December 8, 1997 as a small town that is attractive to suburban families. The city was also featured in a 1995 publication entitled The 100 Best Small Towns in America. Home to Wilmington College, founded in 1870 by the Society of Friends, the city and the surrounding area include more than a dozen Quaker meeting houses.
In the early 1950s the city became home to a number of U.S. Department of Defense facilities, most notably the Clinton County Air Force Base. Following its closure in 1971, the economy of the city hovered in recession for more than a decade. After a number of small attempts to reuse the abandoned air force base, Airborne Express purchased the facility in 1979 for $850,000, a fraction of the estimated $100 million spent to construct it. During the next 24 years, Airborne invested more than $250 million to build a hub for its national delivery network, including new sort centers, a 9,000-foot (2,700 m) runway, aircraft hangars, machine shops, flight simulators, a state of art control tower, and a modern administration building to accommodate an estimated 6,000 employees and its fleet of 125 DC-8, DC-9 and Boeing 767 aircraft.