Finleyville
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 0.167
- State:
- Pennsylvania
Finleyville is a borough located in Washington County, Pennsylvania. Finleyville has a 2026 population of 368. Finleyville is currently declining at a rate of -0.27% annually and its population has decreased by -1.6% since the most recent census, which recorded a population of 374 in 2020.
The median household income in Finleyville is $50,208 with a poverty rate of 14.37%. The median age in Finleyville is 40.4 years: 40 years for males, and 49.5 years for females. For every 100 females there are 109.2 males.