As of the 2010 census, Plymouth Township was 83.1% White, 7.0% Black or African American, 0.1% Native American, 7.2% Asian, and 1.7% were two or more races. 2.6% of the population were of Hispanic or Latino ancestry. As of the census of 2000, there were 16,045 people, 6,512 households, and 4,363 families residing in the township. The population density was 1,907.3 people per square mile. There were 6,703 housing units at an average density of 796.8 per square mile. The racial makeup of the township was 89.26% White, 4.17% African American, 0.09% Native American, 5.22% Asian, 0.01% Pacific Islander, 0.37% from other races, and 0.89% from two or more races. Hispanic or Latino of any race were 1.25% of the population. There were 6,512 households, out of which 25.1% had children under the age of 18 living with them, 55.0% were married couples living together, 8.6% had a female householder with no husband present, and 33.0% were non-families. 26.6% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.97. In the township the population was spread out, with 20.1% under the age of 18, 7.2% from 18 to 24, 29.6% from 25 to 44, 23.9% from 45 to 64, and 19.2% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 94.7 males. For every 100 females age 18 and over, there were 91.2 males. The median income for a household in the township was $54,069, and the median income for a family was $66,938. Males had a median income of $45,953 versus $35,089 for females. The per capita income for the township was $28,862. About 2.4% of families and 4.3% of the population were below the poverty line, including 3.3% of those under age 18 and 4.2% of those age 65 or over.
Government and politics
Plymouth Township is governed by a five-member Council, elected to staggered four-year terms; four Council members are elected by district and one is elected at-large. Council establishes the policies, goals and objectives for the Executive, Administrative, and Advisory functions. Council Members are limited by the Home Rule Charter to two consecutive terms plus the balance of an unexpired term. The current Council members are:
is the local school district. Holy Rosary Regional Catholic School in Plymouth Meeting and Plymouth Township is the area Catholic school. It was formed in 2012 by the merger of Epiphany of Our Lord School in Plymouth Meeting, Our Lady of Victory in East Norriton, and St. Titus in Norristown.
