Fond du Lac County Airport (IATA: FLD, ICAO: KFLD, FAA LID: FLD) is a county-owned public-use airport located 1 mile (2 km) west of the central business district of Fond du Lac, Wisconsin, a city in Fond du Lac County, Wisconsin, United States.

[4] Fond du Lac County Airport covers an area of 586 acres (237 ha) at an elevation of 808 feet (246 m) above mean sea level.

[5] For the 12-month period ending September 27, 2023, the airport had 63,200 aircraft operations, an average of 173 per day: 95% general aviation, 5% air taxi and less than 1% military.

Every year the FAA sets up and operates a temporary air traffic control tower during the event.

[6] Shuttle buses run between the AirVenture grounds and the airport frequently.