Cranbury CDP is a census-designated place and unincorporated area located within Cranbury Township. The population was 2,008 at the 2000 census. Despite the similarity in the name of the Township and the CDP, the two are not one and the same, as is the case for most paired Township / CDP combinations (i.e., a CDP with the same as the Township).
As of the census of 2000, there were 3,227 people, 1,091 households, and 877 families residing in the township. The population density was 240.6 people per square mile (92.9/km²). There were 1,121 housing units at an average density of 83.6/sq mi (32.3/km²). The racial makeup of the township was 88.78% White, 2.26% African American, 7.41% Asian, 0.22% from other races, and 1.33% from two or more races. Hispanic or Latino of any race were 1.70% of the population.
There were 1,091 households out of which 46.3% had children under the age of 18 living with them, 74.6% were married couples living together, 4.3% had a female householder with no husband present, and 19.6% were non-families. 16.3% of all households were made up of individuals and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.92 and the average family size was 3.31.
In the township the population was spread out with 30.4% under the age of 18, 3.4% from 18 to 24, 27.6% from 25 to 44, 27.3% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 93.3 males. For every 100 females age 18 and over, there were 90.4 males.
The median income for a household in the township was $111,680, and the median income for a family was $128,410. Males had a median income of $94,683 versus $44,167 for females. The per capita income for the township was $50,698. About 0.7% of families and 1.6% of the population were below the poverty line, including 2.7% of those under age 18 and 0.9% of those age 65 or over.
Cranbury hosts US 130 and a four-mile section of Interstate 95/New Jersey Turnpike. While Cranbury doesn't have a Turnpike interchange (handled by 8 in East Windsor or 8A in Monroe Twp), it does handle a service area, the Molly Pitcher Service Area at mile marker 71.87 on the southbound side.
The NJTPA is planning to widen the Turnpike (with the "dual-dual" setup) between Exit 6 (in Mansfield Township) and Exit 8A (in Monroe Township). This widening would probably require the condemnation of part of the Molly Pitcher Service Area. New entrance & exit ramps would be constructed as well to access the service area.