Aliquippa
- County:
- Beaver County
- County Seat:
- No
- Area (mi²):
- 4.194
- State:
- Pennsylvania
Aliquippa is a city located in Beaver County, Pennsylvania. Aliquippa has a 2026 population of 9,003. Aliquippa is currently declining at a rate of -0.2% annually and its population has decreased by -2.36% since the most recent census, which recorded a population of 9,221 in 2020.