Look up a city’s urban density on Wikipedia, and you know you’re only getting a small slice of the story. There’s no way exactly 27,857.9 people live in every square mile of New York City – some areas are far more packed, some are relatively empty (at least when it comes to living space). Perhaps the best way to get a true picture of where people live is to check out the residential density per square kilometer.
Via - Visualnews