West Whiteland Township is a township in Chester County, Pennsylvania, United States. The population was 18,274 at the 2010 census.
According to the United States Census Bureau, the township has a total area of 13.0 square miles (34 km2), of which 0.04 square miles (0.10 km2), or 0.15%, is water.
At the 2010 census, the township was 78.8% non-Hispanic White, 5.1% Black or African American, 0.2% Native American, 11.4% Asian, and 2.0% were two or more races. 3.0% of the population were of Hispanic or Latino ancestry.
As of the census of 2000, there were 16,499 people, 6,618 households, and 4,400 families residing in the township. The population density was 1,273.0 people per square mile (491.5/km²). There were 6,748 housing units at an average density of 520.7/sq mi (201.0/km²). The racial makeup of the township was 89.35% White, 5.38% African American, 0.16% Native American, 3.62% Asian, 0.06% Pacific Islander, 0.48% from other races, and 0.95% from two or more races. Hispanic or Latino of any race were 2.00% of the population.
There were 6,618 households, out of which 32.2% had children under the age of 18 living with them, 56.2% were married couples living together, 7.6% had a female householder with no husband present, and 33.5% were non-families. 26.4% of all households were made up of individuals, and 4.9% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 3.00.
In the township the population was spread out, with 25.0% under the age of 18, 6.0% from 18 to 24, 38.1% from 25 to 44, 22.0% from 45 to 64, and 8.8% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 95.8 males. For every 100 females age 18 and over, there were 93.5 males.
The median income for a household in the township was $71,545, and the median income for a family was $81,868. Males had a median income of $57,334 versus $40,827 for females. The per capita income for the township was $35,031. About 0.8% of families and 2.8% of the population were below the poverty line, including 0.4% of those under age 18 and 4.7% of those age 65 or over.