| | Belleville, KS | Loveland, CO | United States |
| Population | 2,063 | 75,938 | 329,725,481 |
| Female Population | 54.4% | 51.2% | 50.5% |
| Male Population | 45.6% | 48.8% | 49.5% |
| Median Age | 39 | 40.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,973 | 67,257 | 309,327,143 |
| Population - 2000 | 2,239 | 50,608 | 285,036,114 |
| Population - 1990 | 2,517 | 37,352 | 251,960,433 |
| Pop. 2000 to Now | -17.8% | 65.0% | 15.6% |
| Pop. 1990 to Now | -26.9% | 123.6% | 30.8% |
| space4 | | | |
| Population Density | 1,008.3 | 2,218.2 | 93.4 |
| Land Area | 2.0 | 34.2 | 3,531,905.4 |
| Water Area | 0.0 | 1.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Belleville, KS | Loveland, CO | United States |
| Age 0 to 4 | 6.8% | 5.8% | 5.9% |
| Age 5 to 9 | 9.5% | 5.5% | 6.1% |
| Age 10 to 14 | 10.7% | 6.5% | 6.6% |
| Age 15 to 17 | 3.7% | 2.9% | 3.9% |
| Age 18 to 20 | 2.2% | 2.6% | 4.0% |
| Age 21 to 24 | 1.6% | 4.9% | 5.2% |
| Age 25 to 34 | 8.7% | 13.8% | 13.8% |
| Age 35 to 44 | 12.8% | 14.0% | 12.9% |
| Age 45 to 54 | 9.3% | 10.6% | 12.6% |
| Age 55 to 59 | 5.4% | 5.9% | 6.7% |
| Age 60 to 64 | 5.2% | 7.1% | 6.3% |
| Age 65 to 74 | 11.6% | 11.8% | 9.6% |
| Age 75 to 84 | 6.7% | 5.1% | 4.5% |
| Age 85 and over | 5.5% | 3.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Belleville, KS | Loveland, CO | United States |
| White | 92.1% | 83.1% | 59.4% |
| Black | 1.6% | 0.5% | 12.2% |
| Asian | 0.7% | 1.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 1.7% | 3.2% |
| Hispanic | 5.2% | 13.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Belleville, KS | Loveland, CO | United States |
| Married Population | 57.9% | 54.8% | 49.8% |
| Currently Married | 57.9% | 53.9% | 48.0% |
| Married but Separated | 0.0% | 0.9% | 1.8% |
| Single Population | 42.1% | 45.2% | 50.2% |
| Never Married | 19.1% | 26.7% | 33.8% |
| Divorced | 13.3% | 12.7% | 10.8% |
| Widowed | 9.7% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.37 | 2.30 | 2.60 |
| Households | 842 | 32,888 | 124,010,992 |
| Family Households | 445 | 20,503 | 80,755,759 |
| Married couple, w/children | 45.2% | 27.3% | 30.5% |
| Married couple, no children | 43.1% | 53.1% | 42.9% |
| Non Family Households | 397 | 12,385 | 43,255,233 |
| Single householder, w/children | 7.4% | 11.9% | 15.8% |
| Single householder, no children | 4.3% | 7.7% | 10.8% |