
Greene County
- State:
- Pennsylvania
- County Seat:
- Waynesburg
Greene County's estimated 2025 population is 34,013 with a growth rate of -0.5% in the past year according to the most recent United States census data. Greene County is the 58th largest county in Pennsylvania. The 2010 population was 38,616 and has seen a growth of -11.92% since that time.