Piney Grove is an unincorporated community and census-designated place (CDP) in Harris County, Georgia, United States.
The 2020 census listed a population of 434.
Piney Grove is located at the intersection of state routes 219 and 315. Atlanta is by road to the northeast and Columbus is by road to the south.
Piney Grove was first listed as a census designated place in the 2020 U.S. census.