New York County is the most densely populated county in the United States, more dense than any individual American city.It is one of the most densely populated areas in the world, with a Census-estimated 2013 population of 1,626,159 living in a land area of 22.96 square miles (59.5 km2), or about 70,826 residents per square mile (27,346/km²). On business days, the influx of commuters increases that number to over 3.9 Million, or around 170,000 people per square mile. It is also one of the wealthiest jurisdictions, being the sole U.S. county whose per capita income exceeded $100,000 in 2010. Manhattan is the third-largest of New York’s five boroughs in