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 Guard has the legal authority to maintain its own state defense force, as recognized by the federal government of the United States under Title 32, Section 109 of the United States Code. Twenty-three states and the Commonwealth of Puerto Rico currently maintain state defense forces. Under New Jersey law, the New Jersey State Guard is a part of the organized militia of New Jersey, making reactivation possible through executive order or an act of legislation. New Jersey State Guard The New Jersey State Guard, previously known as the New Jersey State Militia, is the currently inactive state defense force of New