New Haven is the second-largest city in Connecticut, after Bridgeport and the sixth-largest in New England. With a population at the 2010 United States Census of 129,779 people, New Haven is the principal municipality in the Greater New Haven metropolitan area, which had a total population of 862,477 in 2010. It is located on New Haven Harbor on the northern shore of Long Island Sound in New Haven County, which in turn comprises a part of the New York-Newark-Bridgeport, New York-New Jersey-Connecticut-Pennsylvania Combined Statistical Area. New Haven was founded in 1638 by English Puritans, and a year later eight streets were laid out in a four-by-four grid, creating what is now commonly known as the 'Nine Square Plan', now recognized by the American Institute of Certified Planners as a National Planning Landmark. The central common block is New Haven Green, a 16-acre (6 ha) square, now a National Historic Landmark and the center of Downtown New Haven.
Contributions by Soldaatvanoranje, Gzuckier, and Nunh-huh.