Trenton, New Jersey Trenton, New Jersey Trenton is the capital city of the U.S. state of New Jersey and the county seat of Mercer County. It was briefly the capital of the United States. The city's metropolitan area is grouped with the New York metropolitan area by the United States Census Bureau, but directly borders the Philadelphia metropolitan area and is part of the Philadelphia Combined Statistical Area and the Federal Communications Commission's Philadelphia Designated Market Area. As of the 2010 United States Census, Trenton had a population of 84,913, making it the state's 10th-most-populous municipality. The Census Bureau estimated that the city's
History of New Jersey of the Swedes and the Dutch, resulting in a struggle in which the Dutch proved victorious (1655). However, the English seized the Dutch colony of New Netherland in 1664. New Jersey became one of the Thirteen Colonies which broke away from Britain in the American Revolution, adopting the Declaration of Independence in 1776. Becoming a state upon the formation of the United States, New Jersey saw significant action during the American Revolutionary War. New Jersey's delegates signed the Articles of Confederation in 1779 and Princeton acted as the nation's capital for four months in 1783. In 1787, New Jersey became