South Sterling, PA

South Sterling is a borough in Allegheny County, Pennsylvania, United States. The population was 1,812 at the 2010 census. It is part of the Pittsburgh metropolitan area.

South Sterling is located at .

According to the United States Census Bureau, the borough has a total area of , all of it land.

As of the census of 2000, there were 1,711 people, 675 households, and 489 families residing in the borough. The population density was 2,521.1 people per square mile (984.2/km²). There were 729 housing units at an average density of 1,068.3 per square mile (427.2/km²). The racial makeup of the borough was 98.92% White, 0.09% African American, 0.09% Native American, 0.24% Asian