As of the census[3] of 2000, there were 8,380 people, 3,293 households,
and 2,305 families residing in the township. The population density was
984.9 people per square mile (380.2/km²). There were 3,436 housing units
at an average density of 403.8 per square mile (155.9/km²). The racial
makeup of the township was 89.33% White, 5.02% African American, 0.20%
Native American, 3.32% Asian, 0.68% from other races, and 1.44% from two
or more races. Hispanic or Latino of any race were 3.03% of the
population.

There were 3,293 households out of which 32.6% had children under the age of 18 living with them, 56.5% were married couples living together, 9.8% had a female householder with no husband present, and 30.0% were non-families. 23.5% of all households were made up of individuals and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.03.

In the township the population was spread out with 23.7% under the age of 18, 6.3% from 18 to 24, 34.6% from 25 to 44, 23.8% from 45 to 64, and 11.7% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 94.9 males. For every 100 females age 18 and over, there were 90.9 males.

The median income for a household in the township was $60,131, and the
median income for a family was $71,627. Males had a median income of
$45,604 versus $35,115 for females. The per capita income for the
township was $26,934. About 2.0% of families and 2.8% of the population
were below the poverty line, including 2.2% of those under age 18 and
5.3% of those age 65 or over.

The most common ancestries in Bordentown Township are 1.Italian-20% 2.Irish-18% 3.German-15% 4.English-9% 5.Polish-7%