Wilmington Air Park[1] (IATA: ILN, ICAO: KILN, FAA LID: ILN) is a public-use airport located two nautical miles (3.7 km) southeast of the central business district of Wilmington, a city in Clinton County, Ohio, United States.

While DHL had privately owned the property while operating from the facility, the company agreed to donate the airfield to the Clinton County Port Authority.

[6] Among other duties, the base performed the complete interior reconfigurations, such as of several DC-8s purchased from Eastern Air Lines, moving galleys and lavatories to accommodate high density seating.

[7] The base also handled dispatch of ONA's domestic cargo fleet, which operated for the US Air Force Logair system, and also delivered car parts.

On January 19, 2010, DHL agreed to turn over the airport, including its two runways, control tower, buildings and cargo storage facilities to the Clinton County Port Authority.

[15] In January 2017 Amazon announced it would shift flight operations to Cincinnati/Northern Kentucky International Airport (CVG) alongside a major expansion of service.

The Wilmington Air Park covers an area of 2,000 acres (810 ha) at an elevation of 1,077 feet (328 m) above mean sea level.

[17] For the 12-month period ending January 1, 2016, the airport had 1,000 aircraft operations, an average of 83 per month: 90% air taxi and 10% scheduled commercial.