
Big Run
- County:
- Jefferson County
- County Seat:
- No
- Area (mi²):
- 0.691
- State:
- Pennsylvania
Big Run is a borough located in Jefferson County, Pennsylvania. Big Run has a 2025 population of 625. Big Run is currently declining at a rate of -0.64% annually and its population has decreased by -2.95% since the most recent census, which recorded a population of 644 in 2020.
The average household income in Big Run is $62,943 with a poverty rate of 20.78%. The median age in Big Run is 45.4 years: 45.8 years for males, and 45.1 years for females.