Sussex Airport (ICAO: KFWN, FAA LID: FWN) is a mile southwest of Sussex in Wantage Township, Sussex County, New Jersey. It is just outside Sussex Borough. The public-use airport is privately owned by Sussex Aviation LLC which purchased it in 2015.

The airport used to host the Sussex Airshow but the previous owner had stopped holding the shows (as of 2009) while he tried to sell the airport. The township of Wantage was then studying the feasibility of purchasing the airport.

Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but this airport is FWN to the FAA and has no IATA code.