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About Trenton

Trenton is the capital city of the U.S. state of New Jersey and the seat of Mercer County. It was the capital of the United States from November 1 to December 24, 1784. Princeton and Trenton are the two principal cities of the Princeton-Trenton metropolitan statistical area, which encompasses those cities and all of Mercer County for statistical purposes and constitutes part of the New York combined statistical area by the U.S. Census Bureau. However, Trenton directly borders the Philadelphia metropolitan area to its west, and the city was part of the Philadelphia metropolitan area combined statistical area from 1990 until 2000.As of the 2020 United States census, Trenton was the state's 10th-most-populous municipality, with a population of 90,871, an increase of 5,958 (+7.0%) from the 2010 census count of 84,913, which in turn reflected a decline of 490 (-0.6%) from the 85,403 counted in the 2000 census. The Census Bureau's Population Estimates Program calculated that the city's population was 90,457 in 2021, ranking the city the 378th-most-populous in the country.Trenton dates back at least to June 3, 1719, when mention was made of a constable being appointed for Trenton while the area was still part of Hunterdon County.