West Liberty
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 3.841
- State:
- Pennsylvania
West Liberty is a borough located in Butler County, Pennsylvania. West Liberty has a 2026 population of 323. West Liberty is currently declining at a rate of -0.92% annually and its population has decreased by -3.58% since the most recent census, which recorded a population of 335 in 2020.