Use our interactive map to figure ... New York City Population: 8.18 ... The interactive at the top of this page lets you visualize how different parts of the country compare in population density.

Map lovers and data geeks are in for a real treat thanks to a new online tool called Urban Observatory (h/t Atlantic Cities).The interactive website allows users to compare things like population ...

Still, it's noteworthy that Tokyo is SO large that its population density is 15,604 people per square mile, as compared to New York's 27,578 people per square mile.

That's evident in a time-lapse map by New York University urban scholars Solly Angel and Patrick Lamson-Hall. It shows the rise and fall of Manhattan's population density over the past 210 years ...

See just how big NYC would be if it had the population density of those cities, and more, in this map from Sparefoot. Been there, done that? Think again, my friend.