
Belleville
- County:
- Jefferson County
- County Seat:
- No
- Area (mi²):
- 0.658
- State:
- New York
Belleville is a CDP located in Jefferson County, New York. Belleville has a 2025 population of 305. Belleville is currently growing at a rate of 1.67% annually and its population has increased by 9.32% since the most recent census, which recorded a population of 279 in 2020.
The average household income in Belleville is $67,617 with a poverty rate of 8.23%. The median age in Belleville is 65.2 years: 59.9 years for males, and 69.2 years for females.