Essex County Airport (IATA: CDW, ICAO: KCDW, FAA LID: CDW), informally known as Caldwell Airport, is a public use airport located in Fairfield Township, Essex County, New Jersey, two nautical miles (4 km) north of the central business district of Caldwell, a borough of northwestern Essex County in the U.S. state of New Jersey. It is owned by the Essex County Improvement Authority. This facility is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation reliever airport.