About This Place
Clarksville is a borough in Greene County, Pennsylvania, United States. The population was 234 at the 2000 census.
Clarksville is located at 39°58′27″N 80°2′41″W / 39.97417°N 80.04472°W / 39.97417; -80.04472 (39.974170, -80.044833).
According to the United States Census Bureau, the borough has a total area of 0.1 square miles (0.3 km²), all of it land.