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 until December 24, 1784. Trenton and Princeton are the two principal cities of the Trenton–Princeton 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 combined statistical area from 1990 until 2000. In 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 from the 2010 census count of 84,913, which in turn had reflected a decline of 490 from the 85,403 counted in the 2000 census.

County: Mercer
Founded: June 3, 1719
Incorporated: November 13, 1792
Named for: William Trent
Type: Faulkner Act
Body: City Council
Mayor: Reed Gusciora (term ends December 31, 2026)
Administrator: Adam E. Cruz
Municipal clerk: Brandon Garcia
Water: 7.62%
Area rank: 229th of 565 in state, 9th of 12 in county
Population (2020): 90,871
Estimate (2022): 89,661
Rank: 382nd in country (as of 2022), 10th of 565 in state, 2nd of 12 in county
Density rank: 25th of 565 in state, 1st of 12 in county
Urban: 370,422 (US: 112th)
Metro: 387,340 (US: 143rd)
Time zone: Eastern (EST) (UTC−05:00)
Summer (DST): Eastern (EDT) (UTC−04:00)
ZIP Codes: 08608–08611, 08618–08620, 08625, 08628, 08629, 08638
Area code: 609
FIPS code: 3402174000
GNIS feature ID: 0885421
Official Website: https://www.trentonnj.org/
Wikidata description: capital of New Jersey, United States and seat of Mercer County, New Jersey, United States
Wikidata id: Q25330
Wikidata label: Trenton
Wikidata aliases: Array
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