
Harmony
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 0.394
- State:
- Pennsylvania
Harmony is a borough located in Butler County, Pennsylvania. Harmony has a 2025 population of 910. Harmony is currently declining at a rate of -0.87% annually and its population has decreased by -4.21% since the most recent census, which recorded a population of 950 in 2020.
The average household income in Harmony is $93,584 with a poverty rate of 8.62%. The median age in Harmony is 43.5 years: 44.3 years for males, and 42.6 years for females.