| | Mondovi, WI | Marquand, MO | United States |
| Population | 2,797 | 163 | 329,725,481 |
| Female Population | 53.8% | 49.1% | 50.5% |
| Male Population | 46.2% | 50.9% | 49.5% |
| Median Age | 39.2 | 49.3 | 38.4 |
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| Population - 2010 | 2,775 | 202 | 309,327,143 |
| Population - 2000 | 2,634 | 251 | 285,036,114 |
| Population - 1990 | 2,491 | 278 | 251,960,433 |
| Pop. 2000 to Now | -2.7% | -21.5% | 15.6% |
| Pop. 1990 to Now | 2.9% | -29.1% | 30.8% |
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| Population Density | 731.6 | 684.9 | 93.4 |
| Land Area | 3.8 | 0.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mondovi, WI | Marquand, MO | United States |
| Age 0 to 4 | 6.4% | 0.0% | 5.9% |
| Age 5 to 9 | 6.7% | 12.3% | 6.1% |
| Age 10 to 14 | 6.3% | 1.8% | 6.6% |
| Age 15 to 17 | 2.9% | 3.7% | 3.9% |
| Age 18 to 20 | 3.0% | 1.2% | 4.0% |
| Age 21 to 24 | 3.8% | 0.0% | 5.2% |
| Age 25 to 34 | 13.1% | 14.1% | 13.8% |
| Age 35 to 44 | 14.4% | 8.0% | 12.9% |
| Age 45 to 54 | 9.2% | 25.2% | 12.6% |
| Age 55 to 59 | 7.0% | 6.1% | 6.7% |
| Age 60 to 64 | 7.2% | 13.5% | 6.3% |
| Age 65 to 74 | 10.5% | 5.5% | 9.6% |
| Age 75 to 84 | 5.6% | 8.6% | 4.5% |
| Age 85 and over | 4.1% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mondovi, WI | Marquand, MO | United States |
| White | 96.0% | 97.5% | 59.4% |
| Black | 1.3% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 1.8% | 3.2% |
| Hispanic | 2.3% | 0.6% | 18.4% |
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| Marriage & Family | | | |
| | Mondovi, WI | Marquand, MO | United States |
| Married Population | 45.1% | 42.1% | 49.8% |
| Currently Married | 45.1% | 36.4% | 48.0% |
| Married but Separated | 0.0% | 5.7% | 1.8% |
| Single Population | 54.9% | 57.9% | 50.2% |
| Never Married | 23.7% | 24.3% | 33.8% |
| Divorced | 22.9% | 17.1% | 10.8% |
| Widowed | 8.3% | 16.4% | 5.6% |
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| Household Size | 2.19 | 1.83 | 2.60 |
| Households | 1,250 | 89 | 124,010,992 |
| Family Households | 735 | 31 | 80,755,759 |
| Married couple, w/children | 27.2% | 38.7% | 30.5% |
| Married couple, no children | 41.5% | 45.2% | 42.9% |
| Non Family Households | 515 | 58 | 43,255,233 |
| Single householder, w/children | 21.2% | 12.9% | 15.8% |
| Single householder, no children | 10.1% | 3.2% | 10.8% |