Plum, Pennsylvania

Plum is a borough in Allegheny County, Pennsylvania, United States. The population was 27,144 at the 2020 census. A suburb of the Pittsburgh metropolitan area, it is located northeast of the city in what is commonly referred to as the East Hills suburbs. 
Plum is often referred to as "Plum Boro" or more correctly "Plum Borough" by locals to distinguish it from its previous status as a township. It was founded as Plum Township in 1788 and was reorganized as a borough in 1956. The borough took its name from nearby Plum Creek.
History.
Plum Township was founded on December 18, 1788, as one of the original seven townships of Allegheny County. It originally extended as far south as Versailles (modern-day North Versailles Township), east to the county line, west to Pitt Township, and north to the Allegheny River. Plum has shrunk greatly over the years in area, but still remains among the larger municipalities in Allegheny County.
The 1889 history of Allegheny county, Pennsylvania, describes the township as having "no villages of importance", but listed the first postoffice, Antrim, 1840–1857; New Texas, a hamlet, in the geographic center of the township with "the usual mechanics, local stores, etc.", post office from 1856; and Logan's Ferry, on the Allegheny River and Allegheny Valley railroad, in the northeastern part of the township, deriving its name from early settler Alexander Logan and family, post office from 1844.
Geography.
According to the United States Census Bureau, the borough has a total area of , of which is land and , or 1.34%, is water. Plum Borough is the second largest borough (area-wise) in the state of Pennsylvania.
Demographics.
At the 2010 census there were 27,126 people, 10,528 households, and 7,431 families living in the borough. The population density was 935.4 people per square mile. There were 10,528 housing units at an average density of 363.0 per square mile. The racial makeup of the borough was 93.9% White, 3.6% African American, 0.1% Native American, 1.1% Asian, 0.00% Pacific Islander, 0.2% from other races, and 1.0% from two or more races. Hispanic or Latino of any race were 0.9%.
There were 10,528 households, 29.5% had children under the age of 18 living with them, 62.6% were married couples living together and 29.4% were non-families. 24.5% of households were made up of individuals, and 12.6% were one person aged 65 or older. The average household size was 2.55 and the average family size was 3.09.
The age distribution was 24.2% under the age of 20, 2.5% from 20 to 24, 24.4% from 25 to 44, 29.6% from 45 to 64, and 16.8% 65 or older. The median age was 42.6 years. For every 100 females, there were 97.6 males.
The median household income was $66,680 and the median family income was $74,941. Males had a median income of $54,119 versus $40,625 for females. The per capita income for the borough was $30,474. About 3.8% of families and 4.8% of the population were below the poverty line, including 6.3% of those under age 18 and 3.2% of those age 65 or over.
Government and politics.
Boroughs in Pennsylvania (including Plum) are governed by a Mayor-Council system; in which the mayor has only a few powers and the council is the main legislative body. As of January 2020, the mayor is Harry Schlegel.
Education.
The Plum Borough School District serves the borough grades K–12. The elementary schools (grades K–4) are Center and Pivik. The middle elementary school is Holiday Park Elementary (grades 5–6). The junior high school is A.E. Oblock Junior High School (grades 7–8) and Plum Senior High School serves grades 9–12. The latest redistricting was approved by the Plum School Board in 2018. There were once three other elementary schools, which were called Renton Elementary School, Regency Park Elementary, and the other called Adlai E. Stevenson, both have since been torn down. Plum School District is governed by the Plum School Board.
Plum Borough is also serviced by the Plum Borough Community Library. The library houses the history room of the Allegheny Foothills Historical Society (the Historical Society also provides tours of the reconstructed Carpenter Family Log House in Boyce Park).