Grindstone is an unincorporated community and census-designated place that is located in Jefferson and Redstone townships, in Fayette County, Pennsylvania, United States. The community was part of the Grindstone-Rowes Run CDP before it was split into two separate CDPs for the 2010 census. In 2010, the population was 498.

The ZIP code for this community is 15442.

Geography

Grindstone is primarily located in southern Jefferson Township but extends south across Redstone Creek into the northern part of Redstone Township. It is bordered to the southeast by the community of Rowes Run.

Fayette City is 7.5 miles (12.1 km) to the north, and Uniontown, the Fayette County seat, is 12 miles (19 km) to the southeast. Brownsville is 4 miles (6 km) to the west.

Demographics

As of the 2020 U.S. Census, this town's population was 489.