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
New Jersey State Prison when a convicted sex offender moves into their area. New Jersey State Prison is a complex that consists of three separate but interconnected physical plants from three different eras of prison construction that took place on the property. The three sections are: The 1798 Penitentiary House; The 1832 Fortress Penitentiary; The 1982 Contemporary prison facility. The 1798 NJ Penitentiary House, which was the first State Prison in New Jersey and the third in the nation after the Walnut Street Jail in Philadelphia and Newgate in New York City is also the oldest building still in operation as part of an