There are zero cities in the Northeast megalopolis.
Megalopolis . Later , it was used by Jean Gottmann in his landmark 1961 study , Megalopolis : The Urbanized Northeastern Seaboard of the United States , to describe the chain of metropolitan areas along the northeastern seaboard of the U.S. extending from Boston , Massachusetts , through New York City , Philadelphia , Baltimore , and ending in Washington , D.C. and Northern Virginia . Northeast megalopolis . It includes the major cities of Boston , Providence , Hartford , New York City , Philadelphia , Baltimore , and Washington , D.C. , along with their metropolitan areas and suburbs as well as many smaller urban centers . On a map , the Northeast megalopolis appears almost as a straight line .