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 Police Girt, New Jersey on the same grounds as the current State Police Academy. Out of the 116 men who started training only 81 officers and troopers completed the three-month training program. According to the New Jersey State Police Website, "On December 1, 1921, the new troopers were administered the oath of office and on December 5, 1921, in a blinding snowstorm, started out on horseback and motorcycle to their posts throughout the state." The New Jersey State Police is responsible for general police services, general highway and traffic enforcement, statewide investigation and intelligence services, emergency management, support for state and