New Haven is a coastal city in the U.S. state of Connecticut. It is located on New Haven Harbor on the northern shore of Long Island Sound in New Haven County, Connecticut, and is part of the New York metropolitan area. With a population of 129,779 as determined by the 2010 United States Census, it is the second-largest city in Connecticut after Bridgeport. New Haven is the principal municipality of Greater New Haven, which had a total population of 862,477 in 2010.
New Haven was one of the first planned cities in America. A year after its founding by English Puritans in 1638, eight streets were laid out in a four-by-four grid, creating what is commonly known as the "Nine Square Plan". The central common block is the New Haven Green, a 16-acre square at the center of Downtown New Haven. The Green is now a National Historic Landmark, and the "Nine Square Plan" is recognized by the American Planning Association as a National Planning Landmark.
New Haven is the home of Yale University. As New Haven's biggest taxpayer and employer, Yale serves as an integral part of the city's economy.