Greensburg
- County:
- Westmoreland County
- County Seat:
- Yes
- Area (mi²):
- 4.047
- State:
- Pennsylvania
Greensburg is a city located in Westmoreland County, Pennsylvania. Greensburg has a 2026 population of 14,586. It is also the county seat of Westmoreland County. Greensburg is currently declining at a rate of -0.33% annually and its population has decreased by -2.26% since the most recent census, which recorded a population of 14,924 in 2020.