Demographics
As of the 2010 United States Census, there were 19,180 people, 7,814 households, and 5,339 families residing in the township. The population density was 1,115.1 inhabitants per square mile (430.5/km2). There were 8,180 housing units at an average density of 475.6 per square mile (183.6/km2). The racial makeup of the township was 89.8% White, 2.8% African American, 0.1% Native American, 4.7% Asian, 1.3% from other races, and 1.3% from two or more races. Hispanic or Latino of any race were 4.7% of the population.

There were 7,814 households, out of which 29.5% had children under the age of 18 living with them, 56.6% were married couples living together, 8.5% had a female householder with no husband present, and 31.7% were non-families. 24.827% of all households were made up of individuals, and 35.1% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.89.

In the township the population was spread out, with 21.6% under the age of 20, 3.9% from 20 to 24, 20.8% from 25 to 44, 31.7% from 45 to 64, and 22% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 89.6 males. For every 100 females age 18 and over, there were 86.9 males.

The median income for a household in the township was $64,854, and the median income for a family was $78,629. Males had a median income of $55,047 versus $41,610 for females. The per capita income for the township was $36,274. About 2.6% of families and 3.8% of the population were below the poverty line, including 5.73% of those under age 18 and 4.2% of those age 65 or over.