[benp]

Originally Posted by iheartthed

Major U.S. cities with at least 4M people in 100 km radius, in order:

New York City 20,598,460
Los Angeles 16,362,200
Philadelphia: 9,994,674
Chicago 9,726,824
Baltimore: 8,872,962
Washington: 7,985,888
San Francisco: 7,575,869
Boston: 7,408,713
Detroit: 6,555,219
Dallas: 5,776,509
Fort Lauderdale: 5,418,778
Atlanta: 5,174,462
Houston: 5,156,490
Miami: 4,965,401
Cleveland: 4,105,153
Seattle: 4,025,621

This might surprise some.

Buffalo: 5,248,179 (measured from Delaware Park)
Niagara Falls: 7,546,879 (measured from downtown Niagara Falls, NY)

For Buffalo/Niagara Falls, 100km distance includes portions of Rochester, Hamilton, and Toronto.

Youngstown: 5,246,975
Toledo: 4,746,203