- For the township in Venango County, see Plum Township, Pennsylvania.
National Register of Historic Places
|Founded as Plum Township||1788|
|• Total||29.0 sq mi (75 km2)|
|• Land||28.6 sq mi (74 km2)|
|• Water||0.4 sq mi (1 km2) 1.34%|
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.
According to the United States Census Bureau, the borough has a total area of 29.0 square miles (75 km2), of which 28.6 square miles (74 km2) is land and 0.4 square miles (1.0 km2), or 1.34%, is water.
- Pucketa Creek joins the Allegheny River where the creek forms the boundary between the borough of Plum and the city of Lower Burrell.
- Abers Creek
- Plum Creek rises in the borough.
- Little Plum Creek
- Monroeville (south)
- Penn Hills (west)
- Oakmont (west)
- Harmar Township (north across Allegheny River)
- Cheswick (north across Allegheny River)
- Springdale (north across Allegheny River)
- Lower Burrell (north, in Westmoreland County)
- Upper Burrell Township (northeast, in Westmoreland County)
- Murrysville (east, in Westmoreland County)
As of the census of 2010, there were 27,126 people, 10,528 households, and 7,431 families residing 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% of the population.
There were 10,528 households out of which 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 all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.09.
In the borough the population was spread out with 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% who were 65 years of age or older. The median age was 42.6 years. For every 100 females there were 97.6 males.
The median income for a household in the borough was $66,680, and the median income for a family 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.
The Plum Borough School District serves the borough grades K–12. The elementary schools (grades K–6) include Center, Adlai E. Stevenson, Holiday Park, Regency Park, and Pivik. A.E. O'Block Junior High School serves grades 7–8 and Plum Senior High School serves grades 9–12.
- The majority of Oakmont Country Club is within Plum's borders. The course has been consistently ranked as one of the five best by Golf Digest 100 Greatest Golf Courses in America. In 2007, Oakmont placed 5th by the magazine. It is one of only a few courses ranked every year in the top ten of the publication's history. The top 50 toughest courses ranks Oakmont also at #5, while GolfLink.com ranks it at #3 overall. It hosted its eighth U.S. Open in 2007, the most of any course.
- A location of Kings Family Restaurants on the Golden Mile Highway (Rt. 286) is a popular dining spot for Plum residents.
- William D. Boyce, founder of the Boy Scouts of America
- Steven Fabian, Channel One News anchor
- Bjorn Fratangelo, won 2011 French Open in tennis 
- Frank Marchlewski, former NFL player who was offensive lineman for six seasons for the Los Angeles Rams, Atlanta Falcons, and Buffalo Bills
- Pat McAfee, punter for Indianapolis Colts, former punter/kicker West Virginia Mountaineers football team
- Scott McGough, pitcher in the Miami Marlins system, former pitcher Oregon Ducks baseball team & United States national baseball team
- Mike Miller, NFL coach, currently the offensive coordinator for the Arizona Cardinals
- R. J. Umberger, ice hockey player, center for the Columbus Blue Jackets
- Bill Wilmore, IFBB professional bodybuilder, competed in Mr. Olympia
- Vic Zucco, former NFL defensive back who played four seasons for the Chicago Bears
- Juliann Sheldon, Miss Pennsylvania 2011, Miss Jewel of the West 2011
- "Race, Hispanic or Latino, Age, and Housing Occupancy: 2010 Census Redistricting Data (Public Law 94-171) Summary File (QT-PL), Plum borough, Pennsylvania". U.S. Census Bureau, American FactFinder 2. Retrieved September 21, 2011.
- "Pucketa Creek". Geographic Names Information System, U.S. Geological Survey. Retrieved 2009-12-02.
- "Plum Creek". Geographic Names Information System, U.S. Geological Survey. Retrieved 2010-12-18.
- "Number of Inhabitants: Pennsylvania". 18th Census of the United States. U.S. Census Bureau. Retrieved 22 November 2013.
- "Pennsylvania: Population and Housing Unit Counts". U.S. Census Bureau. Retrieved 22 November 2013.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "Annual Estimates of the Resident Population". U.S. Census Bureau. Retrieved 22 November 2013.
- "ThePittsburghCannel.com: U.S. Open Won't Really Be Played In Oakmont". ThePittsburghCannel. 2007-06-05.
- "America's 100 Greatest Courses". Golf Digest. May 2007. Archived from the original on 2007-06-07. Retrieved 2007-06-10.
- "America's 50 Toughest Golf Courses". Golf Digest. March 2007. Retrieved 2007-06-10.[dead link]
- "Top 100 United States Golf Courses". Golf Link. 2007. Retrieved 2007-06-10.
- "About Unity Volunteer Fire Department". 2009. Retrieved 2009-09-12.
- "King's Family Restaurants". 2013. Retrieved 2013-07-06.