Southern Wisconsin Regional Airport (IATA: JVL, ICAO: KJVL, FAA LID: JVL) is a public airport located 3 nautical miles (5.6 km; 3.5 mi) southwest of the central business district of Janesville, and north of Beloit in Rock County, Wisconsin, United States. Formerly known as Rock County Airport, it is owned and operated by the Rock County government.