Trenton, New Jersey
capital city of the U.S. state of New Jersey and seat of Mercer County
Trenton is the capital city of the U.S. state of New Jersey and the county 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 fifth largest city in Central Jersey and the 10th-most-populous municipality statewide, with a population of 90,871, an increase of 5,958 (+7.0%) from the 2010 census count of 84,913, which in turn had 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 91,506 in 2025, ranking the city the 383rd-most-populous in the country. Trenton is the only city in New Jersey that is served by three commuter rail transit systems (Amtrak, NJ Transit, and SEPTA), and the city has encouraged a spate of transit-oriented development.
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. Boundaries were recorded for Trenton Township as of March 2, 1720. A courthouse and jail were constructed in Trenton around 1720, and the Freeholders of Hunterdon County met annually in Trenton.
“Trenton, New Jersey” enters the record as capital city of the U.S. state of New Jersey and seat of Mercer County. Crown Archives preserves that source wording while asking what Trenton, Jersey and capital can confirm, complicate or overturn.
Why this record matters
“Trenton, New Jersey” is worth following because a concise public description often conceals a longer documentary argument. Here, Trenton, Jersey and capital provides the most credible route into that argument.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Sep 26, 2026. The linked authority identifier is Q25330. VIAF identifies the subject as 125484202. The Library of Congress control number is n80023169. Authority coordinates are 40.220, -74.766. 3 of 5 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1784, 1990, 2000 and 2020.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
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Three-step research path
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Questions for further research
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This entry incorporates text from “Trenton, New Jersey” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.