| | Holmen, WI | Mahtomedi, MN | United States |
| Population | 10,613 | 8,041 | 329,725,481 |
| Female Population | 49.7% | 51.5% | 50.5% |
| Male Population | 50.3% | 48.5% | 49.5% |
| Median Age | 38 | 44.7 | 38.4 |
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| Population - 2010 | 9,166 | 7,717 | 309,327,143 |
| Population - 2000 | 6,200 | 7,563 | 285,036,114 |
| Population - 1990 | 3,220 | 5,569 | 251,960,433 |
| Pop. 2000 to Now | 67.2% | 9.4% | 15.6% |
| Pop. 1990 to Now | 222.0% | 48.6% | 30.8% |
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| Population Density | 1,544.2 | 2,326.7 | 93.4 |
| Land Area | 6.9 | 3.5 | 3,531,905.4 |
| Water Area | 0.0 | 2.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Holmen, WI | Mahtomedi, MN | United States |
| Age 0 to 4 | 5.2% | 8.0% | 5.9% |
| Age 5 to 9 | 6.2% | 5.7% | 6.1% |
| Age 10 to 14 | 8.7% | 5.7% | 6.6% |
| Age 15 to 17 | 6.7% | 3.8% | 3.9% |
| Age 18 to 20 | 2.4% | 4.2% | 4.0% |
| Age 21 to 24 | 3.7% | 3.6% | 5.2% |
| Age 25 to 34 | 12.2% | 9.8% | 13.8% |
| Age 35 to 44 | 15.1% | 9.6% | 12.9% |
| Age 45 to 54 | 15.7% | 12.6% | 12.6% |
| Age 55 to 59 | 3.4% | 10.0% | 6.7% |
| Age 60 to 64 | 6.7% | 6.4% | 6.3% |
| Age 65 to 74 | 7.9% | 11.9% | 9.6% |
| Age 75 to 84 | 4.5% | 5.6% | 4.5% |
| Age 85 and over | 1.7% | 3.0% | 1.9% |
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| Race | | | |
| | Holmen, WI | Mahtomedi, MN | United States |
| White | 85.2% | 92.4% | 59.4% |
| Black | 1.1% | 2.7% | 12.2% |
| Asian | 7.8% | 2.1% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 3.1% | 1.9% | 3.2% |
| Hispanic | 2.7% | 0.9% | 18.4% |
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| Marriage & Family | | | |
| | Holmen, WI | Mahtomedi, MN | United States |
| Married Population | 53.0% | 63.6% | 49.8% |
| Currently Married | 52.0% | 63.3% | 48.0% |
| Married but Separated | 1.0% | 0.3% | 1.8% |
| Single Population | 47.0% | 36.4% | 50.2% |
| Never Married | 30.4% | 22.8% | 33.8% |
| Divorced | 11.4% | 8.4% | 10.8% |
| Widowed | 5.3% | 5.3% | 5.6% |
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| Household Size | 2.50 | 2.69 | 2.60 |
| Households | 4,232 | 2,965 | 124,010,992 |
| Family Households | 2,622 | 2,205 | 80,755,759 |
| Married couple, w/children | 41.7% | 34.9% | 30.5% |
| Married couple, no children | 38.8% | 55.1% | 42.9% |
| Non Family Households | 1,610 | 760 | 43,255,233 |
| Single householder, w/children | 13.1% | 6.7% | 15.8% |
| Single householder, no children | 6.4% | 3.3% | 10.8% |