The City of New York, often called New York City or simply New York, is the most populous city in the United States. Located at the southern tip of the State of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world. A global power city, New York City exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment, its fast pace defining the term New York minute. Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world.Situated on one of the world's largest natural harbors, New York City consists of five boroughs, each of which is a separate county of New York State. The five boroughs – Brooklyn, Queens, Manhattan, The Bronx, and Staten Island – were consolidated into a single city in 1898. With a U.S. Census Bureau-estimated 2015 population of 8,550,405 distributed over a land area of just 305sqmi, New York is the most densely populated major city in the United States. The city and its metropolitan area constitute the premier gateway for legal immigration to the United States, and as many as 800 languages are spoken in New York, making it the most linguistically diverse city in the world. By 2015 estimates, the New York City metropolitan region remains by a significant margin the most populous in the United States, as defined by both the Metropolitan Statistical Area (20.2 million residents) and the Combined Statistical Area (23.7 million residents). In 2013, the MSA produced a gross metropolitan product (GMP) of nearly US$1.39 trillion, while in 2012, the CSA generated a GMP of over US$1.55 trillion, both ranking first nationally by a wide margin and behind the GDP of only twelve and eleven countries, respectively.