Baltimore/Washington International Thurgood Marshall Airport (IATA: BWI, ICAO: KBWI, FAA LID: BWI) is, as of calendar year 2014, the largest, by passenger count, of three major airports serving the Baltimore–Washington Metropolitan Area in the United States, the other two being Ronald Reagan Washington National Airport and Washington Dulles International Airport. It is commonly referred to as BWI or BWI Marshall. Located next to the CDP Linthicum in northern unincorporated Anne Arundel County, Maryland, the airport is about 10 miles (16 km) south of Baltimore and 32 miles (51 km) northeast of Washington, D.C.