Plainsboro Township is a township in Middlesex County in the U.S. state of New Jersey. As of the 2010 United States Census, the township’s population was 22,999, reflecting an increase of 2,784 (+13.8%) from the 20,215 counted in the 2000 Census, which had in turn increased by 6,002 (+42.2%) from the 14,213 counted in the 1990 Census.
According to the United States Census Bureau, the township had a total area of 12.207 square miles (31.614 km), including 11.785 square miles (30.522 km) of land and 0.422 square miles (1.092 km) of water (3.45%).
Plainsboro Center (with a 2010 Census population of 2,712) and Princeton Meadows (13,834 as of 2010) are unincorporated communities and census-designated places (CDPs) located within Plainsboro Township.
Other unincorporated communities, localities and place names located partially or completely within the township include Aqueduct, Schalks and Scotts Corner.
The township borders Cranbury Township and South Brunswick Township in Middlesex County, and East Windsor Township, Princeton and West Windsor Township in Mercer County.
As of the 2010 United States Census, there were 22,999 people, 9,402 households, and 5,885.652 families residing in the township. The population density was 1,951.6 per square mile (753.5/km). There were 10,089 housing units at an average density of 856.1 per square mile (330.5/km). The racial makeup of the township was 41.07% (9,445) White, 8.03% (1,847) Black or African American, 0.30% (69) Native American, 46.22% (10,630) Asian, 0.02% (4) Pacific Islander, 1.76% (404) from other races, and 2.61% (600) from two or more races. Hispanic or Latino of any race were 6.21% (1,429) of the population. As of the 2010 Census, 29.6% of the township’s population self-identified as being Indian American, making them the largest minority group in the township.
There were 9,402 households out of which 36.5% had children under the age of 18 living with them, 53.4% were married couples living together, 7.0% had a female householder with no husband present, and 37.4% were non-families. 31.2% of all households were made up of individuals, and 3.8% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.14.
In the township, the population was spread out with 24.7% under the age of 18, 6.0% from 18 to 24, 35.7% from 25 to 44, 26.2% from 45 to 64, and 7.5% who were 65 years of age or older. The median age was 35.5 years. For every 100 females there were 98.8 males. For every 100 females ages 18 and older there were 96.4 males.
The Census Bureau’s 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $86,986 (with a margin of error of +/- $5,536) and the median family income was $114,457 (+/- $6.162). Males had a median income of $76,846 (+/- $6,185) versus $58,515 (+/- $5,722) for females. The per capita income for the township was $46,222 (+/- $2,054). About 1.9% of families and 3.9% of the population were below the poverty line, including 3.6% of those under age 18 and 4.0% of those age 65 or over.
As of the 2000 United States Census there were 20,215 people, 8,742 households, and 5,122 families residing in the township. The population density was 1,707.7 people per square mile (659.2/km²). There were 9,133 housing units at an average density of 771.5 per square mile (297.8/km²). The racial makeup of the township was 58.20% White, 7.58% African American, 0.10% Native American, 30.51% Asian, 0.01% Pacific Islander, 1.36% from other races, and 2.24% from two or more races. Hispanic or Latino of any race were 4.64% of the population.
As part of the 2000 Census, 16.97% of Plainsboro Township residents identified themselves as being Indian American. This was the second-highest percentage (behind Edison) of Indian American people in any municipality in the United States with 1,000 or more residents identifying their ancestry. In the 2000 census, 8.55% of Plainsboro Township’s residents identified themselves as being of Chinese ancestry. This was the second-highest percentage (behind Holmdel Township) of people with Chinese ancestry in any municipality in New Jersey with 1,000 or more residents identifying their ancestry.
There were 8,742 households out of which 33.4% had children under the age of 18 living with them, 50.4% were married couples living together, 6.4% had a female householder with no husband present, and 41.4% were non-families. 33.9% of all households were made up of individuals and 2.2% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 3.06.
In the township the population was spread out with 24.6% under the age of 18, 6.5% from 18 to 24, 45.2% from 25 to 44, 19.4% from 45 to 64, and 4.2% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 102.4 males. For every 100 females age 18 and over, there were 100.8 males.
The median income for a household in the township was $72,097, and the median income for a family was $88,783 (these figures had risen to $82,609 and $102,586 respectively as of the 2007 American Community Survey estimate). Males had a median income of $62,327 versus $44,671 for females. The per capita income for the township was $38,982. About 1.4% of families and 3.0% of the population were below the poverty line, including 1.7% of those under age 18 and 2.3% of those age 65 or over.
Plainsboro New Jersey neighborhoods include: Gentry, Hale, Princeton Crossing 2, Princetown Meadows, Raven’s Crest, Schalks Crossing, Scotts Corner, South Plainsboro, The Crossings Plainsboro