| | Sleepy Eye, MN | Darfur, MN | United States |
| Population | 3,454 | 71 | 329,725,481 |
| Female Population | 49.0% | 18.3% | 50.5% |
| Male Population | 51.0% | 81.7% | 49.5% |
| Median Age | 40.9 | 54.4 | 38.4 |
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| Population - 2010 | 3,594 | 108 | 309,327,143 |
| Population - 2000 | 3,515 | 137 | 285,036,114 |
| Population - 1990 | 3,694 | 128 | 251,960,433 |
| Pop. 2000 to Now | -5.3% | -25.6% | 15.6% |
| Pop. 1990 to Now | -9.9% | -20.3% | 30.8% |
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| Population Density | 2,016.4 | 310.0 | 93.4 |
| Land Area | 1.7 | 0.2 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Sleepy Eye, MN | Darfur, MN | United States |
| Age 0 to 4 | 5.5% | 0.0% | 5.9% |
| Age 5 to 9 | 5.0% | 0.0% | 6.1% |
| Age 10 to 14 | 6.9% | 7.0% | 6.6% |
| Age 15 to 17 | 4.2% | 14.1% | 3.9% |
| Age 18 to 20 | 3.2% | 0.0% | 4.0% |
| Age 21 to 24 | 6.6% | 2.8% | 5.2% |
| Age 25 to 34 | 11.6% | 2.8% | 13.8% |
| Age 35 to 44 | 10.2% | 15.5% | 12.9% |
| Age 45 to 54 | 13.6% | 11.3% | 12.6% |
| Age 55 to 59 | 6.8% | 0.0% | 6.7% |
| Age 60 to 64 | 6.1% | 19.7% | 6.3% |
| Age 65 to 74 | 12.7% | 19.7% | 9.6% |
| Age 75 to 84 | 4.1% | 5.6% | 4.5% |
| Age 85 and over | 3.6% | 1.4% | 1.9% |
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| Race | | | |
| | Sleepy Eye, MN | Darfur, MN | United States |
| White | 83.5% | 100.0% | 59.4% |
| Black | 0.0% | 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 | 0.2% | 0.0% | 3.2% |
| Hispanic | 16.3% | 0.0% | 18.4% |
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| Marriage & Family | | | |
| | Sleepy Eye, MN | Darfur, MN | United States |
| Married Population | 54.7% | 36.4% | 49.8% |
| Currently Married | 54.7% | 36.4% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 45.3% | 63.6% | 50.2% |
| Never Married | 25.6% | 30.3% | 33.8% |
| Divorced | 10.9% | 25.8% | 10.8% |
| Widowed | 8.8% | 7.6% | 5.6% |
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| Household Size | 2.35 | 1.61 | 2.60 |
| Households | 1,422 | 44 | 124,010,992 |
| Family Households | 1,000 | 12 | 80,755,759 |
| Married couple, w/children | 28.8% | 41.7% | 30.5% |
| Married couple, no children | 47.3% | 58.3% | 42.9% |
| Non Family Households | 422 | 32 | 43,255,233 |
| Single householder, w/children | 13.3% | 0.0% | 15.8% |
| Single householder, no children | 10.6% | 0.0% | 10.8% |