New York City, with a Census-estimated population of 8,584,629 in July 2025, is a large and ethnically diverse metropolis. It is the largest city in the United States, and has a long history of international immigration. The New York region continues to be by far the leading metropolitan gateway for legal immigrants admitted into the United States. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the U.S. by both population and urban area. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York City is one of the world's most populous megacities.