Detroit Metropolitan Wayne County Airport (IATA: DTW, ICAO: KDTW, FAA LID: DTW) is the primary international airport serving Detroit and its surrounding metropolitan area in Michigan, United States. It is located in Romulus, a Detroit suburb. It is by far Michigan's busiest airport, with ten times as many enplanements and deplanements as the next-busiest, Gerald R. Ford International Airport in Grand Rapids and more than all other airports in the state combined.

The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021 categorized it as a large hub primary commercial service facility. The airport covers 4,850 acres (1,960 ha) of land.

The airport is a major hub for Delta Air Lines and is also a base for Spirit Airlines.The airport has service to 30 international destinations and service to 39 states across the United States. Operated by the Wayne County Airport Authority, the airport has six runways, two terminals, and 129 in-service gates. Detroit Metropolitan Airport has maintenance facilities capable of servicing and repairing aircraft as large as the Boeing 747-400.

Metro Airport serves the Metropolitan Detroit area; the Toledo, Ohio, area about 40 miles (64 km) south; the Ann Arbor area to the west; Windsor, Ontario; and Southwestern Ontario in Canada. The airport serves over 140 destinations and was named the best large U.S. airport in customer satisfaction by J.D. Power & Associates in 2010, 2019, and 2022.