About This Place
Heidelberg is a small suburb southwest of Pittsburgh in Allegheny County, Pennsylvania, United States. The population was 1,244 at the 2010 census.
Heidelberg is located at 40°23′27″N 80°5′26″W / 40.39083°N 80.09056°W / 40.39083; -80.09056 (40.390919, -80.090693).
According to the United States Census Bureau, the borough has a total area of 0.3 square miles (0.7 km²), all of it land.