Blairsville is a borough in Indiana County, Pennsylvania, 42 miles (68 km) east of Pittsburgh, and on the Conemaugh River. As of the 2010 census it had a population of 3,412.
Blairsville was settled in 1818 and incorporated in 1825. In the past, railway shops, foundries, machine shops, enameling plants, and manufactories of plate glass and lumber employed the residents. It was the seat of Blairsville College, a Presbyterian institution opened in 1851.
The Blairsville Armory and St. Peter's Episcopal Church and Rectory are listed on the National Register of Historic Places.
Blairsville is located in the southern portion of Indiana County, bordered by the Conemaugh River, Westmoreland County, Pennsylvania to the south and west and Burrell Township to the north and east.
According to the United States Census Bureau, the borough has a total area of 1.41 square miles (3.66 km2), all of it land.
As of the census of 2000, there were 3,607 people, 1,631 households, and 983 families residing in the borough. The population density was 2,591.3 people per square mile (1,001.9/km²). There were 1,830 housing units at an average density of 1,314.7 per square mile (508.3/km²). The racial makeup of the borough was 95.68% White, 2.99% African American, 0.11% Native American, 0.58% Asian, 0.06% from other races, and 0.58% from two or more races.