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 June 3, 1719. Trenton became New Jersey's capital as of November 25, 1790, and the City of Trenton was formed within Trenton Township on November 13, 1792. Trenton Township was incorporated as one of New Jersey's initial group of 104 townships by an Act of the New Jersey Legislature on February 21, 1798. Portions of the township were taken on February 22, 1834, to form Ewing Township. A series of annexations took place over a fifty-year period, with the city absorbing South Trenton borough , portions of Nottingham Township , Chambersburg and Millham Township (both on March 30, 1888) and Wilbur borough .
As of the census of 2000, there were 85,403, people, 29,437 households, and 18,692 families residing in the city. The population density was 11,153.6 people per square mile (4,304.7/km² ). There were 33,843 housing units at an average density of 4,419.9 per square mile (1,705.9/km²). The racial makeup of the city was 52.06% African American, 32.55% White, 0.35% Native American, 0.84% Asian, 0.23% Pacific Islander, 10.76% from other races, and 3.20% from two or more races. Hispanic or Latino of any race were 21.53% of the population. Non-Hispanic whites made made 24.62% of the population.
There were 29,437 households, 32.4% of which had children under the age of 18 living with them. 29.0% were married couples living together, 27.1% had a female householder with no husband present, and 36.5% were non-families. 29.7% of all households were made up of individuals and 12.0% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.38.
In the city the population was spread out with 27.7% under the age of 18, 10.1% from 18 to 24, 31.9% from 25 to 44, 18.9% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 97.6 males. For every 100 females age 18 and over, there were 96.0 males.
The median income for a household in the city was $31,074, and the median income for a family was $36,681. Males had a median income of $29,721 versus $26,943 for females. The per capita income for the city was $14,621. About 17.6% of families and 21.1% of the population were below the poverty line, including 26.8% of those under age 18 and 19.5% of those age 65 or over.
Top 10 ethnicities reported during the 2000 Census by percentage
City highways include the Trenton Freeway, which is part of U.S. Route 1, and the John Fitch Parkway, which is part of Route 29. Canal Boulevard, more commonly known as Route 129, connects US Route 1 and NJ Route 29 in South Trenton. U.S. Route 206, Route 31, and Route 33 also pass through the city via regular city streets (Broad Street/Brunswick Avenue/Princeton Avenue, Pennington Avenue, and Greenwood Avenue, respectively). Interstate 195 connects the city to the New Jersey Turnpike via NJ Routes 29 and 129. The Pennsylvania Turnpike also passes close to the city.
Public transportation within the city and to/from its nearby suburbs is provided in the form of local bus routes run by New Jersey Transit. SEPTA also provides bus service to adjacent Bucks County, Pennsylvania.
The Trenton Train Station, located on the heavily traveled Northeast Corridor, serves as the northbound terminus for SEPTA's R7 Trenton line (local train service to Philadelphia) and southbound terminus for New Jersey Transit's Northeast Corridor Line (local train service to New York). The train station also serves as the northbound terminus for the River Line; a diesel light rail line that runs to Camden. Two additional River Line stops, Cass Street and Hamilton Avenue, are located within the city.
Long-distance transportation is provided by Amtrak train service along the Northeast Corridor. Limited commercial airline transportation is provided at nearby Trenton-Mercer Airport in Ewing. Much more extensive airline service is available at the more distant international airports in Newark (reachable by direct New Jersey Transit or Amtrak rail link) and Philadelphia.