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 2026 population of 225. Portersville is currently declining at a rate of -0.88% annually and its population has decreased by -3.43% since the most recent census, which recorded a population of 233 in 2020.
The median household income in Portersville is $79,375 with a poverty rate of 10.71%. The median age in Portersville is 49.7 years: 49.2 years for males, and 50.5 years for females. For every 100 females there are 110.8 males.