<Tr> <Td_colspan="2"> Highest elevation 4,180 ft / 1,274 m (Slide Mountain (Ulster County, New York), in the Catskill Mountains). Lowest elevation 0 ft / 0 m (sea level) at the Atlantic Ocean, Long Island Sound, and at Hudson River estuary waterways . </Td> </Tr> <P> The New York metropolitan area, also referred to as the Tri-State Area, is the largest metropolitan area in the world by urban landmass, at 4,495 sq mi (11,640 km). The metropolitan area includes New York City (the most populous city in the United States), Long Island, and the Mid and Lower Hudson Valley in the state of New York; the five largest cities in New Jersey: Newark, Jersey City, Paterson, Elizabeth, and Edison, and their vicinities; six of the seven largest cities in Connecticut: Bridgeport, New Haven, Stamford, Waterbury, Norwalk, and Danbury, and their vicinities . </P> <P> The New York metropolitan area remains, by a significant margin, the most populous in the United States, as defined by both the Metropolitan Statistical Area (20.3 million residents in 2017) and the Combined Statistical Area (23.7 million residents in 2016); it is also one of the most populous urban agglomerations in the world, and the single largest in North America . The New York metropolitan area continues to be the premier gateway for legal immigration to the United States, with the largest foreign - born population of any metropolitan region in the world . The MSA covers 6,720 sq mi (17,405 km), while the CSA area is 13,318 sq mi (34,493 km), encompassing an ethnically and geographically diverse region . The New York metropolitan area's population is larger than that of the state of New York, and the metropolitan airspace accommodated over 130 million passengers in 2016 . </P> <P> As a center of many industries, including finance, international trade, new and traditional media, real estate, education, fashion, entertainment, tourism, biotechnology, law, and manufacturing, the New York City metropolitan region is one of the most important economic regions in the world; in 2015, the MSA produced a gross metropolitan product (GMP) of nearly US $1.60 trillion, while in 2015, the CSA had a GMP of over US $1.83 trillion, both ranking first nationally by a wide margin and behind the GDP of only nine nations and seven nations, respectively . In 2012, the New York metropolitan area was also home to seven of the 25 wealthiest counties in the United States by median household income, according to the American Community Survey . According to Forbes, in 2014, the New York City metropolitan area was home to eight of the top ten ZIP codes in the United States by median housing price, with six in Manhattan alone . The New York Metropolitan Area also houses five of the top ten richest places in America, according to Bloomberg . These are Scarsdale, NY; Short Hills, NJ; Old Greenwich, CT; Bronxville, NY; and Darien, CT . The New York metropolitan region's higher education network comprises hundreds of colleges and universities, including Columbia University, Princeton University, Yale University, New York University, Rockefeller University, and Cornell University all of which have been ranked among the top 40 in the world . </P>

What is the population of metropolitan new york city