Here are the densest cities in the United States in terms of urban sprawl within its city boundaries not counting the surrounding cities that makes up the area's metropolis as of 2013.
1. New York, New York
New York city may be the only city in the United States that can compete with the density and population of mega cities like Shanghai, Tokyo or London. The Big apple has the most extensive subway network in the United States making owning a car a luxury more than a necessity.
2. San Francisco, California
Surrounded by water on three sides, San Francisco has a dense urban core comparable to New York city. Its excellent subway system called the BART (Bay Area Rapid Transit) connects San Francisco and nearby Oakland.
3. Los Angeles, California
Miles of flat lands allowed Los Angeles to expand horizontally and as a result, creating the largest urban sprawl in the United States. As a consequence of this massive outward expansion, Los Angeles remains a car centric metropolis.
4. Chicago, Illinois
Chicago's geography is not at all constrained but has an extensive skyline that resembles closely to New York's skyline and also home to one of the country's . Chicago also has a decent urban sprawl expanding outwards.
5. Honolulu, Hawaii
Lined up with hotels and residential buildings, Honolulu may sound like an isolated sparsely populated city on an island but it has actually one of the densest city in the United States.