A New York City isn’t the biggest city in the world, but it is the biggest city in the United States. Most Americans live in much smaller cities and towns, but almost eight million people live in New York City. Why do so many people come to live in one place? A look at the city shows us that New York City has a very good port A New York City is not the biggest city in the world, but it is the biggest city in the United States. Most Americans live in much smaller cities and towns, but almost eight million people live in New York City. Why do so many people come to live in one place? A look at the city shows us that New York City has a very good port