| | Brooklyn, MI | Louisa, KY | United States |
| Population | 889 | 2,637 | 329,725,481 |
| Female Population | 53.2% | 51.0% | 50.5% |
| Male Population | 46.8% | 49.0% | 49.5% |
| Median Age | 55.9 | 42.5 | 38.4 |
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| Population - 2010 | 1,203 | 2,447 | 309,327,143 |
| Population - 2000 | 1,176 | 2,018 | 285,036,114 |
| Population - 1990 | 1,027 | 1,990 | 251,960,433 |
| Pop. 2000 to Now | -0.9% | 15.2% | 15.6% |
| Pop. 1990 to Now | 13.4% | 16.8% | 30.8% |
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| Population Density | 880.2 | 1,176.2 | 93.4 |
| Land Area | 1.0 | 2.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Brooklyn, MI | Louisa, KY | United States |
| Age 0 to 4 | 4.4% | 10.8% | 5.9% |
| Age 5 to 9 | 3.0% | 5.4% | 6.1% |
| Age 10 to 14 | 5.4% | 6.2% | 6.6% |
| Age 15 to 17 | 2.9% | 6.0% | 3.9% |
| Age 18 to 20 | 4.2% | 1.3% | 4.0% |
| Age 21 to 24 | 1.8% | 3.0% | 5.2% |
| Age 25 to 34 | 6.3% | 12.1% | 13.8% |
| Age 35 to 44 | 6.9% | 6.8% | 12.9% |
| Age 45 to 54 | 13.5% | 14.8% | 12.6% |
| Age 55 to 59 | 11.0% | 7.8% | 6.7% |
| Age 60 to 64 | 5.4% | 9.6% | 6.3% |
| Age 65 to 74 | 14.7% | 8.4% | 9.6% |
| Age 75 to 84 | 13.9% | 4.1% | 4.5% |
| Age 85 and over | 6.5% | 3.6% | 1.9% |
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| Race | | | |
| | Brooklyn, MI | Louisa, KY | United States |
| White | 94.8% | 95.2% | 59.4% |
| Black | 0.6% | 0.8% | 12.2% |
| Asian | 0.1% | 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 | 2.1% | 0.4% | 3.2% |
| Hispanic | 2.4% | 3.6% | 18.4% |
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| Marriage & Family | | | |
| | Brooklyn, MI | Louisa, KY | United States |
| Married Population | 39.0% | 46.5% | 49.8% |
| Currently Married | 37.3% | 41.0% | 48.0% |
| Married but Separated | 1.7% | 5.4% | 1.8% |
| Single Population | 61.0% | 53.5% | 50.2% |
| Never Married | 29.7% | 23.3% | 33.8% |
| Divorced | 17.0% | 17.3% | 10.8% |
| Widowed | 14.3% | 13.0% | 5.6% |
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| Household Size | 1.88 | 3.07 | 2.60 |
| Households | 473 | 830 | 124,010,992 |
| Family Households | 192 | 600 | 80,755,759 |
| Married couple, w/children | 19.3% | 24.7% | 30.5% |
| Married couple, no children | 52.1% | 34.0% | 42.9% |
| Non Family Households | 281 | 230 | 43,255,233 |
| Single householder, w/children | 14.6% | 18.8% | 15.8% |
| Single householder, no children | 14.1% | 22.5% | 10.8% |