Plainsboro Center, New Jersey

Plainsboro Center is an unincorporated community and census-designated place (CDP) located within Plainsboro Township, situated in southern Middlesex County, within the U.S. state of New Jersey. As of the 2020 United States census, the CDP's population was 2,760, its highest decennial count ever and an increase of 48 (+1.8%) from the 2,712 recorded at the 2010 census, which in turn reflected an increase of 503 (+22.8%) from the 2,209 counted in the 2000 census.

Geography
According to the United States Census Bureau, the CDP had a total area of 0.762 mi2, including 0.759 mi2 of land and 0.003 mi2 of water (0.42%).

2010 census
The 2010 United States census counted 2,712 people, 1,192 households, and 735 families in the CDP. The population density was 3572.0 /mi2. There were 1,311 housing units at an average density of 1726.7 /mi2. The racial makeup was 42.74% (1,159) White, 4.87% (132) Black or African American, 0.44% (12) Native American, 48.53% (1,316) Asian, 0.04% (1) Pacific Islander, 1.07% (29) from other races, and 2.32% (63) from two or more races. Hispanic or Latino of any race were 5.09% (138) of the population.

Of the 1,192 households, 32.6% had children under the age of 18; 53.7% were married couples living together; 5.8% had a female householder with no husband present and 38.3% were non-families. Of all households, 33.9% were made up of individuals and 5.0% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.97.

23.0% of the population were under the age of 18, 5.1% from 18 to 24, 41.0% from 25 to 44, 22.7% from 45 to 64, and 8.1% who were 65 years of age or older. The median age was 33.9 years. For every 100 females, the population had 96.9 males. For every 100 females ages 18 and older there were 95.8 males.

2000 census
As of the 2000 United States Census there were 2,209 people, 1,026 households, and 572 families living in the CDP. The population density was 1,273.0 /km2. There were 1,089 housing units at an average density of 627.6 /km2. The racial makeup of the CDP was 53.19% White, 4.75% African American, 0.05% Native American, 38.89% Asian, 0.95% from other races, and 2.17% from two or more races. Hispanic or Latino of any race were 4.21% of the population.

There were 1,026 households, out of which 29.1% had children under the age of 18 living with them, 48.8% were married couples living together, 5.2% had a female householder with no husband present, and 44.2% were non-families. 37.8% of all households were made up of individuals, and 1.8% had someone living alone who was 65 years of age or older. The average household size was 2.15 and the average family size was 2.90.

In the CDP the population was spread out, with 21.9% under the age of 18, 7.3% from 18 to 24, 51.1% from 25 to 44, 16.3% from 45 to 64, and 3.4% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 107.6 males. For every 100 females age 18 and over, there were 107.1 males.

The median income for a household in the CDP was $70,759, and the median income for a family was $81,201. Males had a median income of $70,110 versus $42,500 for females. The per capita income for the CDP was $36,555. About 4.8% of families and 3.8% of the population were below the poverty line, including 3.6% of those under age 18 and 35.8% of those age 65 or over.

Nearby historic communities

 * Blackwells Mills in Franklin Township (Somerset County)
 * Blawenburg in Montgomery Township
 * Clarksburg in Millstone Township
 * Dayton in South Brunswick
 * The Estate of Duke Farms in Hillsborough
 * Dutch Neck in West Windsor Township
 * Griggstown in Franklin Township (Somerset County)
 * Harlingen in Montgomery Township
 * Kingston in Franklin Township (Somerset County) and South Brunswick
 * Lawrenceville in Lawrence Township (Mercer County)
 * The Livingston Avenue Historic District in New Brunswick
 * Marlboro in Marlboro Township, along with a detailed list of Historic Sites in Marlboro Township
 * The Monmouth Battlefield Historic District in Freehold Township and Manalapan Township
 * Monmouth Junction in South Brunswick
 * Perrineville in Millstone Township
 * The Princeton Battlefield Historic District in Princeton
 * Princeton Junction in West Windsor Township
 * The Road Up Raritan Historic District in Piscataway
 * Tennent in Manalapan Township
 * West Freehold in Freehold Township