
Portersville
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 0.795
- State:
- Pennsylvania
Portersville is a borough located in Butler County, Pennsylvania. Portersville has a 2025 population of 219. Portersville is currently declining at a rate of -0.9% annually and its population has decreased by -5.19% since the most recent census, which recorded a population of 231 in 2020.
The average household income in Portersville is $75,171 with a poverty rate of 14.09%. The median age in Portersville is 49.3 years: 52.2 years for males, and 45.8 years for females.