| | Mount Prospect, IL | Rosemount, MN | United States |
| Population | 56,510 | 25,513 | 329,725,481 |
| Female Population | 50.2% | 50.3% | 50.5% |
| Male Population | 49.9% | 49.7% | 49.5% |
| Median Age | 40.5 | 37.5 | 38.4 |
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| Population - 2010 | 55,082 | 21,956 | 309,327,143 |
| Population - 2000 | 56,265 | 14,619 | 285,036,114 |
| Population - 1990 | 53,170 | 8,622 | 251,960,433 |
| Pop. 2000 to Now | -5.3% | 76.5% | 15.6% |
| Pop. 1990 to Now | 0.2% | 199.2% | 30.8% |
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| Population Density | 5,272.0 | 767.2 | 93.4 |
| Land Area | 10.7 | 33.3 | 3,531,905.4 |
| Water Area | 0.0 | 2.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Mount Prospect, IL | Rosemount, MN | United States |
| Age 0 to 4 | 6.9% | 6.6% | 5.9% |
| Age 5 to 9 | 5.5% | 8.2% | 6.1% |
| Age 10 to 14 | 6.6% | 8.4% | 6.6% |
| Age 15 to 17 | 3.9% | 4.4% | 3.9% |
| Age 18 to 20 | 2.5% | 2.8% | 4.0% |
| Age 21 to 24 | 2.9% | 4.5% | 5.2% |
| Age 25 to 34 | 13.4% | 11.5% | 13.8% |
| Age 35 to 44 | 14.0% | 14.5% | 12.9% |
| Age 45 to 54 | 14.6% | 15.2% | 12.6% |
| Age 55 to 59 | 5.9% | 6.8% | 6.7% |
| Age 60 to 64 | 6.1% | 5.6% | 6.3% |
| Age 65 to 74 | 9.3% | 7.3% | 9.6% |
| Age 75 to 84 | 5.9% | 3.4% | 4.5% |
| Age 85 and over | 2.5% | 0.8% | 1.9% |
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| Race | | | |
| | Mount Prospect, IL | Rosemount, MN | United States |
| White | 64.5% | 83.6% | 59.4% |
| Black | 3.1% | 4.2% | 12.2% |
| Asian | 13.7% | 4.6% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.1% | 0.4% |
| Two or More Races | 2.2% | 4.0% | 3.2% |
| Hispanic | 16.0% | 3.4% | 18.4% |
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| Marriage & Family | | | |
| | Mount Prospect, IL | Rosemount, MN | United States |
| Married Population | 60.6% | 63.2% | 49.8% |
| Currently Married | 59.4% | 62.8% | 48.0% |
| Married but Separated | 1.1% | 0.4% | 1.8% |
| Single Population | 39.4% | 36.8% | 50.2% |
| Never Married | 26.2% | 24.7% | 33.8% |
| Divorced | 7.0% | 8.8% | 10.8% |
| Widowed | 6.2% | 3.3% | 5.6% |
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| Household Size | 2.60 | 2.82 | 2.60 |
| Households | 21,666 | 9,021 | 124,010,992 |
| Family Households | 15,235 | 7,236 | 80,755,759 |
| Married couple, w/children | 38.6% | 39.8% | 30.5% |
| Married couple, no children | 44.8% | 42.3% | 42.9% |
| Non Family Households | 6,431 | 1,785 | 43,255,233 |
| Single householder, w/children | 8.3% | 12.7% | 15.8% |
| Single householder, no children | 8.3% | 5.3% | 10.8% |