Summerville is a borough in Jefferson County, Pennsylvania, United States.

[3] Summerville is located in western Jefferson County at 41°06′59″N 79°11′18″W / 41.116428°N 79.188391°W / 41.116428; -79.188391,[4] in the valley of Redbank Creek.

Pennsylvania Route 28 (Harrison Street) passes through the north side of the borough, leading northeast up the creek valley 7 miles (11 km) to Brookville, the county seat, and southwest 12 miles (19 km) to New Bethlehem.

The racial makeup of the borough was 98.10% White, 0.57% Native American, and 1.33% from two or more races.

Christ's Dominion Academy, a private Christian school, is located in the borough.