Newark Liberty International Airport (IATA: EWR, ICAO: KEWR), formerly known as Newark International Airport, is an international airport within the city limits of both Newark and Elizabeth, New Jersey, United States. It is about 15 miles south west of New York City.

Newark is the second-largest hub for Continental Airlines, which is the airport's largest tenant (operating all of Terminal C and part of Terminal A). United Airlines and FedEx operate cargo hubs.

In 2006, Newark Airport handled about 36 million passengers. Along with JFK's 43 million and LaGuardia's 26 million, New York's airspace surpasses that of Chicago to become the busiest in the United States.