Arthur Dunn Airpark (FAA LID: X21) is a public-use airport located 2 miles (3.2 km) northwest of the central business district of the city of Titusville in Brevard County, Florida, United States. The airport is publicly owned and is administered under the cognizance of the Titusville-Cocoa Airport Authority. The airport has one paved runway that is 2,961 feet in length and a turf runway that is 1,805 feet in length.