As of the 2000 United States Census there were 2,382 people, 842 households, and 681 families living in the CDP. The population density was 491.8/km2. There were 858 housing units at an average density of 177.2/km2. The racial makeup of the CDP was 86.99% White, 2.02% African American, 0.13% Native American, 8.86% Asian, 0.76% from other races, and 1.26% from two or more races. Hispanic or Latino of any race were 3.06% of the population. There were 842 households out of which 41.7% had children under the age of 18 living with them, 71.0% were married couplesliving together, 7.4% had a female householder with no husband present, and 19.1% were non-families. 15.6% of all households were made up of individuals and 5.8% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.14. In the CDP the population was spread out with 28.3% under the age of 18, 4.0% from 18 to 24, 27.8% from 25 to 44, 28.9% from 45 to 64, and 11.0% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 99.2 males. For every 100 females age 18 and over, there were 98.4 males. The median income for a household in the CDP was $116,668, and the median income for a family was $127,617. Males had a median income of $100,000 versus $58,750 for females. The per capita income for the CDP was $44,113. None of the families and 1.5% of the population were living below the poverty line, including no under eighteens and 5.3% of those over 64.
Business and industry
At the turn of the century two of Princeton Junction's landmark retailers closed. One was Lick-It ice cream, a tiny kiosk-like yellow building that served ice cream to walk-in and drive-through customers, always including a trademark nonpareil in the ice cream. Also, the family-owned Lucar Hardware store shut down due to competition with superstores like Home Depot and Lowe's Hardware. Competition was not the only factor, however. The owners sought to retire, and the land had become more valuable. The site is now occupied by PNC Bank. In 2008-2009, Princeton Junction saw the further closure of a number of businesses that had been longtime fixtures. Among the most significant is the closure of an Acme Supermarket, which had been an anchor tenant in the Windsor Plaza Shopping Center for 50 years. Other closures were prompted to make way for the construction of a new Rite Aid store. Some residents blame the 'deterioration' of the central Princeton Junction area on a lack of political consensus.
Notable people
People who were born in, residents of, or otherwise closely associated with Princeton Junction include:
Christopher McQuarrie, screenwriter, was born either in Princeton Junction, where he was raised, or in nearby Princeton. Different sources — and in the case of All Movie Guide, the same source — give both places. Note that Princeton Junction has no hospital.
