
Belleville
- County:
- Mifflin County
- County Seat:
- No
- Area (mi²):
- 1.996
- State:
- Pennsylvania
Belleville is a CDP located in Mifflin County, Pennsylvania. Belleville has a 2025 population of 1,818. Belleville is currently declining at a rate of -0.05% annually and its population has decreased by -1.09% since the most recent census, which recorded a population of 1,838 in 2020.
The average household income in Belleville is $84,072 with a poverty rate of 7.47%. The median age in Belleville is 58.7 years: 57.8 years for males, and 61 years for females.