
Mill Run
- County:
- Fayette County
- County Seat:
- No
- Area (mi²):
- 0.302
- State:
- Pennsylvania
Mill Run is a CDP located in Fayette County, Pennsylvania. Mill Run has a 2025 population of 134. Mill Run is currently growing at a rate of 7.2% annually but its population has decreased by -33.66% since the most recent census, which recorded a population of 202 in 2020.
The average household income in Mill Run is $58,383 with a poverty rate of 8.64%. The median age in Mill Run is 61.1 years: 46 years for males, and 61.1 years for females.