As of the census of 2000, there were 37,405 people, 13,347 households, and 10,076 families residing in the township. The population density was 1,341.7 per square mile (518.0/km²). There were 13,967 housing units at an average density of 501.0/sq mi (193.4/km²). The racial makeup of the township was 93.43% White, 2.97% African American, 0.40% Native American, 0.76% Asian, 0.02% Pacific Islander, 0.87% from other races, and 1.56% from 2 or more races. Hispanic or Latino of any race were 2.52% of the population.
There were 13,347 households out of which 43.1% had children under the age of 18 living with them, 62.1% were married couples living together, 9.5% had a female householder with no husband present, and 24.5% were non-families. 19.2% of all households were made up of individuals and 4.7% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.22.
In the township the population was spread out with 29.8% under the age of 18, 7.9% from 18 to 24, 36.4% from 25 to 44, 19.3% from 45 to 64, and 6.6% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 98.5 males. For every 100 females age 18 and over, there were 95.6 males.
The median income for a household in the township was $61,630, and the median income for a family was $69,554. Males had a median income of $50,834 versus $30,275 for females. The per capita income for the township was $24,410. About 3.9% of families and 4.7% of the population were below the poverty line, including 6.8% of those under age 18 and 3.8% of those age 65 or over.