
Zelienople
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 2.053
- State:
- Pennsylvania
Zelienople is a borough located in Butler County, Pennsylvania. Zelienople has a 2025 population of 3,715. Zelienople is currently declining at a rate of -1.01% annually and its population has decreased by -4.87% since the most recent census, which recorded a population of 3,905 in 2020.
The average household income in Zelienople is $89,564 with a poverty rate of 3.63%. The median age in Zelienople is 44.5 years: 39.2 years for males, and 48.6 years for females.