Manhattan is not only one of the wealthiest counties in the United States, but also one of the most densely populated areas in the world and the most densely populated of the five boroughs of New York City.It has been calculated that 1,585,873 people live in a land area of 22.96 square miles (59.5 km2), or about 69,071 residents per square mile (26,668/km²).
From the numbers above we conclude that if everyone lived as densely as they do in Manhattan, the human race would fit in the 268,680 km² area of New Zealand!
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