
Belleville
- County:
- Republic County
- County Seat:
- Yes
- Area (mi²):
- 2.056
- State:
- Kansas
Belleville is a city located in Republic County, Kansas. Belleville has a 2025 population of 1,979. It is also the county seat of Republic County. Belleville is currently declining at a rate of -0.2% annually and its population has decreased by -1% since the most recent census, which recorded a population of 1,999 in 2020.
The average household income in Belleville is $65,505 with a poverty rate of 14.2%. The median age in Belleville is 38 years: 39.6 years for males, and 36.3 years for females.