
Allegheny township
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 24.953
- State:
- Pennsylvania
Allegheny township is located in Butler County, Pennsylvania. Allegheny township has a 2025 population of 597. Allegheny township is currently declining at a rate of -0.83% annually and its population has decreased by -4.17% since the most recent census, which recorded a population of 623 in 2020.
The average household income in Allegheny township is $75,178 with a poverty rate of 13.47%. The median age in Allegheny township is 38.5 years: 41.3 years for males, and 34.7 years for females.