| | Amery, WI | Belton, MO | United States |
| Population | 2,899 | 23,832 | 329,725,481 |
| Female Population | 52.1% | 53.7% | 50.5% |
| Male Population | 47.9% | 46.3% | 49.5% |
| Median Age | 41.6 | 35.4 | 38.4 |
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| Population - 2010 | 2,930 | 23,138 | 309,327,143 |
| Population - 2000 | 2,845 | 21,730 | 285,036,114 |
| Population - 1990 | 2,657 | 18,150 | 251,960,433 |
| Pop. 2000 to Now | -1.6% | 9.5% | 15.6% |
| Pop. 1990 to Now | 5.3% | 31.1% | 30.8% |
| space4 | | | |
| Population Density | 936.1 | 1,685.9 | 93.4 |
| Land Area | 3.1 | 14.1 | 3,531,905.4 |
| Water Area | 0.7 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Amery, WI | Belton, MO | United States |
| Age 0 to 4 | 3.7% | 6.3% | 5.9% |
| Age 5 to 9 | 5.2% | 6.9% | 6.1% |
| Age 10 to 14 | 8.4% | 7.9% | 6.6% |
| Age 15 to 17 | 3.7% | 3.4% | 3.9% |
| Age 18 to 20 | 2.6% | 2.7% | 4.0% |
| Age 21 to 24 | 1.7% | 5.5% | 5.2% |
| Age 25 to 34 | 9.4% | 16.7% | 13.8% |
| Age 35 to 44 | 18.2% | 12.1% | 12.9% |
| Age 45 to 54 | 4.3% | 11.8% | 12.6% |
| Age 55 to 59 | 10.6% | 6.2% | 6.7% |
| Age 60 to 64 | 9.0% | 5.6% | 6.3% |
| Age 65 to 74 | 14.0% | 9.4% | 9.6% |
| Age 75 to 84 | 4.8% | 4.5% | 4.5% |
| Age 85 and over | 4.5% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Amery, WI | Belton, MO | United States |
| White | 94.9% | 81.1% | 59.4% |
| Black | 0.3% | 4.3% | 12.2% |
| Asian | 1.8% | 0.4% | 5.6% |
| Native American | 0.3% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.4% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 2.0% | 3.9% | 3.2% |
| Hispanic | 0.5% | 8.9% | 18.4% |
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| Marriage & Family | | | |
| | Amery, WI | Belton, MO | United States |
| Married Population | 52.2% | 50.8% | 49.8% |
| Currently Married | 51.6% | 48.9% | 48.0% |
| Married but Separated | 0.6% | 2.0% | 1.8% |
| Single Population | 47.8% | 49.2% | 50.2% |
| Never Married | 22.6% | 28.0% | 33.8% |
| Divorced | 17.2% | 15.6% | 10.8% |
| Widowed | 8.1% | 5.6% | 5.6% |
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| Household Size | 2.52 | 2.53 | 2.60 |
| Households | 1,096 | 9,363 | 124,010,992 |
| Family Households | 736 | 6,572 | 80,755,759 |
| Married couple, w/children | 22.4% | 26.7% | 30.5% |
| Married couple, no children | 46.5% | 41.9% | 42.9% |
| Non Family Households | 360 | 2,791 | 43,255,233 |
| Single householder, w/children | 25.4% | 19.5% | 15.8% |
| Single householder, no children | 5.7% | 11.9% | 10.8% |