| | Allendale, MI | Eagan, MN | United States |
| Population | 23,999 | 68,205 | 329,725,481 |
| Female Population | 55.2% | 50.5% | 50.5% |
| Male Population | 44.8% | 49.5% | 49.5% |
| Median Age | 21.4 | 38.8 | 38.4 |
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| Population - 2010 | 16,652 | 64,204 | 309,327,143 |
| Population - 2000 | 11,555 | 63,557 | 285,036,114 |
| Population - 1990 | 6,950 | 47,409 | 251,960,433 |
| Pop. 2000 to Now | 82.3% | 3.8% | 15.6% |
| Pop. 1990 to Now | 203.0% | 39.2% | 30.8% |
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| Population Density | 1,056.0 | 2,186.6 | 93.4 |
| Land Area | 22.7 | 31.2 | 3,531,905.4 |
| Water Area | 0.9 | 2.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Allendale, MI | Eagan, MN | United States |
| Age 0 to 4 | 4.4% | 5.7% | 5.9% |
| Age 5 to 9 | 3.2% | 6.7% | 6.1% |
| Age 10 to 14 | 4.1% | 6.2% | 6.6% |
| Age 15 to 17 | 3.4% | 4.2% | 3.9% |
| Age 18 to 20 | 30.9% | 2.5% | 4.0% |
| Age 21 to 24 | 20.4% | 4.8% | 5.2% |
| Age 25 to 34 | 9.2% | 14.0% | 13.8% |
| Age 35 to 44 | 6.5% | 14.7% | 12.9% |
| Age 45 to 54 | 5.6% | 12.2% | 12.6% |
| Age 55 to 59 | 2.9% | 8.1% | 6.7% |
| Age 60 to 64 | 4.4% | 6.8% | 6.3% |
| Age 65 to 74 | 3.3% | 9.5% | 9.6% |
| Age 75 to 84 | 1.1% | 3.1% | 4.5% |
| Age 85 and over | 0.5% | 1.5% | 1.9% |
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| Race | | | |
| | Allendale, MI | Eagan, MN | United States |
| White | 89.2% | 72.7% | 59.4% |
| Black | 2.1% | 10.0% | 12.2% |
| Asian | 1.8% | 9.5% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.4% | 0.2% | 0.4% |
| Two or More Races | 2.3% | 2.5% | 3.2% |
| Hispanic | 4.1% | 4.7% | 18.4% |
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| Marriage & Family | | | |
| | Allendale, MI | Eagan, MN | United States |
| Married Population | 26.2% | 55.6% | 49.8% |
| Currently Married | 26.0% | 54.9% | 48.0% |
| Married but Separated | 0.2% | 0.7% | 1.8% |
| Single Population | 73.8% | 44.4% | 50.2% |
| Never Married | 66.6% | 30.2% | 33.8% |
| Divorced | 5.9% | 10.6% | 10.8% |
| Widowed | 1.3% | 3.6% | 5.6% |
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| Household Size | 2.78 | 2.46 | 2.60 |
| Households | 7,070 | 27,589 | 124,010,992 |
| Family Households | 3,556 | 17,963 | 80,755,759 |
| Married couple, w/children | 36.2% | 33.3% | 30.5% |
| Married couple, no children | 37.3% | 47.1% | 42.9% |
| Non Family Households | 3,514 | 9,626 | 43,255,233 |
| Single householder, w/children | 12.3% | 13.2% | 15.8% |
| Single householder, no children | 14.2% | 6.4% | 10.8% |