
Arnold City
- County:
- Fayette County
- County Seat:
- No
- Area (mi²):
- 0.48
- State:
- Pennsylvania
Arnold City is a CDP located in Fayette County, Pennsylvania. Arnold City has a 2025 population of 384. Arnold City is currently declining at a rate of -2.04% annually but its population has increased by 13.95% since the most recent census, which recorded a population of 337 in 2020.
The average household income in Arnold City is $25,467 with a poverty rate of 52.62%. The median age in Arnold City is 46.3 years: 45.7 years for males, and 49.7 years for females.