The
Northeast megalopolis (also
Boston–Washington Corridor or
Bos-Wash Corridor) is the most heavily
urbanized region of the
United States, running primarily northeast to southwest from the northern
suburbs of
Boston,
Massachusetts, to the southern suburbs of
Washington, D.C., in
Northern Virginia. It includes the major cities of
Boston,
New York City,
Philadelphia,
Baltimore, and Washington, D.C., along with their metropolitan areas and suburbs as well as many smaller urban centers.