Lenawee County Airport (IATA: ADG, ICAO: KADG, FAA LID: ADG) is a county-owned public-use airport located three miles (5 km) southwest of the central business district of Adrian, a city in Lenawee County, Michigan, United States. The airport is accessible by road from Cadmus Road, and is close to US-223. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a local general aviation facility.

The Lenawee County Airport is the closest airport to Michigan International Speedway, the Irish Hills, and Michigan State University's Hidden Lake Gardens. Siena Heights University, Adrian College, and Jackson Community College Lenawee Campus are also just a few miles away. LCA's arrival and departure process is centrally located between Ann Arbor and Jackson, Michigan, and Toledo, Ohio. The airport is staffed between 8am and dusk.

The airport is home to a chapter of the Civil Air Patrol, which, besides its duties to the U.S. Air Force, hosts community events for locals interested in aviation.