Carnegie is located at. It is approximately southwest of Pittsburgh. Chartiers Creek runs through the center of the borough. According to the United States Census Bureau, the borough has a total area of, all of it land. Its average elevation is above sea level. It is part of the 18th Congressional District.
Carnegie is named after Andrew Carnegie, who donated one of his libraries for the gesture. It was incorporated on March 1, 1894 from the boroughs of Chartiers and Mansfield. Later, the borough annexed part of Robinson Township. Neighborhoods include Rosslyn Heights, Cubbage Hill, Irishtown, Forsythe Hill, Library Hill, and Old Mansfield. Many neighborhoods were at one time or another mined for coal. The main employers were steel mills such as Superior Steel & Union Electric Steel. Carnegie had a rail yard that had connections to several railroads early in the twentieth century, including the Wabash Pittsburgh Terminal railroad, and the Pennsylvania Railroad. On August 25, 1923, Carnegie was invaded by an estimated 10,000–30,000 members of the Ku Klux Klan, there to celebrate a so-called "Karnegie Day" and target the heavily-Catholic town residents. The Klan's parade through town was resisted by local residents, resulting in a riot which left injuries on both sides and the death of a Klansman. In the 1970s, Carnegie suffered economically with the closure of the great steel mills such as J & L in and around Pittsburgh. In 2004, Carnegie was significantly damaged by flooding as a result of Hurricane Ivan. Much of the commercial section of the borough, as well as the borough's Roman Catholic churches, was closed or damaged. But since 2014, Carnegie's Main Street has rebounded with many new restaurants and small businesses. It is becoming a popular Pittsburgh-area destination, especially on weekends.
Carnegie's students are served by the Carlynton School District. There is an elementary school within the Borough.
Demographics
As of the census of 2000, there were 8,389 people, 3,967 households, and 2,134 families residing in the borough. The population density was 5,076.7 people per square mile. There were 4,249 housing units at an average density of 2,571.3 per square mile. The racial makeup of the borough was 91.32% White, 5.57% African American, 0.08% Native American, 1.23% Asian, 0.05% Pacific Islander, 0.39% from other races, and 1.36% from two or more races. Hispanic or Latino of any race were 0.99% of the population. There were 3,967 households, out of which 22.7% had children under the age of 18 living with them, 37.4% were married couples living together, 13.2% had a female householder with no husband present, and 46.2% were non-families. 40.4% of all households were made up of individuals, and 18.3% had someone living alone who was 65 years of age or older. The average household size was 2.10 and the average family size was 2.86. In the borough the population was spread out, with 19.4% under the age of 18, 8.1% from 18 to 24, 30.4% from 25 to 44, 22.0% from 45 to 64, and 20.1% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 85.0 males. For every 100 females age 18 and over, there were 81.0 males. The median income for a household in the borough was $32,589, and the median income for a family was $41,371. Males had a median income of $30,792 versus $26,239 for females. The per capita income for the borough was $21,119. About 9.7% of families and 11.5% of the population were below the poverty line, including 19.4% of those under age 18 and 7.2% of those age 65 or over.
