California
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 11.011
- State:
- Pennsylvania
California is a borough located in Washington County, Pennsylvania. California has a 2026 population of 4,628. California is currently declining at a rate of -0.34% annually and its population has decreased by -13.71% since the most recent census, which recorded a population of 5,363 in 2020.