Wausau Downtown Airport is a city owned public use airport located in Wausau, a city in Marathon County, Wisconsin, United States. The airport serves general aviation aircraft, charter flights and seaplane operations. 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.HistoryThe Wausau airport was founded in 1927 and carried commercial flights until 1969, when the Central Wisconsin Airport began operations.Facilities and aircraftWausau Downtown Airport covers an area of 294acres at an elevation of 1,201 feet above mean sea level. The airport contains two asphalt paved runways: 13/31 measuring 5,200 x 100 ft. with approved GPS approaches and 5/23 measuring 3,041 x 100 ft. . It also has a seaplane landing area designated 12W/30W which measures 8,000 x 300 ft. . The Wausau NDB navaid, frequency 243 kHz, is located on the field.For the 12-month period ending October 7, 2015, the airport had 36,400 aircraft operations, an average of 100 per day: 93% general aviation, 7% air taxi and less than 1% military. In August 2017, there were 62 aircraft based at this airport: 55 single-engine, 1 multi-engine, 1 helicopter, 1 glider and 4 ultralights.