Morristown Airport (IATA: MMU, ICAO: KMMU, FAA LID: MMU) is in Morris County, New Jersey, United States, three miles east of downtown Morristown and 27 miles west of Manhattan, New York City. Operated by DM AIRPORTS, LTD, it is in the Whippany section of Hanover. The National Plan of Integrated Airport Systems for 2011–2015 called it a general aviation reliever airport.