Cities in the Boston–Washington Megalopolis

The Northeast Megalopolis (BosWash) spans ~500 miles and includes these principal metropolitan cores:

1. Boston, MA
2. Providence, RI
3. New York City, NY
4. Philadelphia, PA
5. Baltimore, MD
6. Washington, D.C.

Collectively: ~50+ million people, ~20% of U.S. GDP. Continuous urban/suburban development links them.