Clinton County, Ohio Business Directory & Community Resources
View a map of Clinton County
View the 2025 U.S. Census demographic profile for Clinton County
Clinton County — County Seat: Wilmington
2026 Population Estimate: 42,556 | Official Website: https://www.clintoncountyohio.com/
Clinton County is a southwest Ohio county, centered on Wilmington — a community with deep Quaker roots that is home to Wilmington College, a liberal arts college founded by the Religious Society of Friends in 1870. The county experienced a devastating economic blow in 2009 when DHL (formerly ATA Airlines / ABX Air) dramatically reduced operations at the Wilmington Air Park (formerly Airborne Express), eliminating thousands of jobs virtually overnight — an event that made national news. The county has since worked to rebuild its economy around logistics, agriculture, and manufacturing. The Air Park is now operated by Air Transport International and other air cargo operations, and still represents an important regional economic asset. The county has a pleasant small-town agricultural character, and Quaker heritage remains a source of community pride. The Ohio Caverns near West Liberty (Logan County) attracts visitors from this region.
▸ Key Industries & Major Employers
Air freight, logistics, manufacturing, and agriculture.
Wilmington is home to one of the nation's most important air cargo hubs. Airborne Express (now DHL) Air Park is the county's largest employer complex, with DHL, Amazon Air, and associated logistics companies operating from the Wilmington Air Park. Other major employers include Clinton Memorial Hospital, Wilmington College, Murphy Farms, and several food-processing operations.
▸ Notable Economic Development Initiatives
The Wilmington Air Park continues to attract new airline cargo tenants following years of recovery after DHL's 2008 contraction. In 2023-2024, Amazon Air significantly expanded its Wilmington operations. The Clinton County Convention & Visitors Bureau and Port Authority work jointly to market the air cargo ecosystem. JobsOhio supports manufacturing retention in the county.
▸ Infrastructure & Investment Highlights
I-71 runs through the county. The Wilmington Air Park (KILN) is a former Air Force base with 11,000-foot runways, making it one of the largest cargo airports in the country by runway capacity. US-68 and SR-73 provide road connections. A 2024 runway surface restoration project at KILN was completed to handle growing cargo volumes.
