| | Erie, MI | Mount Sterling, KY | United States |
| Population | 4,314 | 7,517 | 329,725,481 |
| Female Population | 49.2% | 55.1% | 50.5% |
| Male Population | 50.8% | 45.0% | 49.5% |
| Median Age | 39.1 | 39.2 | 38.4 |
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| Population - 2010 | 4,514 | 6,904 | 309,327,143 |
| Population - 2000 | 4,850 | 5,876 | 285,036,114 |
| Population - 1990 | 4,492 | 5,362 | 251,960,433 |
| Pop. 2000 to Now | -10.9% | 23.3% | 15.6% |
| Pop. 1990 to Now | -3.8% | 35.1% | 30.8% |
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| Population Density | 181.9 | 1,703.4 | 93.4 |
| Land Area | 23.7 | 4.4 | 3,531,905.4 |
| Water Area | 5.9 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Erie, MI | Mount Sterling, KY | United States |
| Age 0 to 4 | 4.9% | 6.5% | 5.9% |
| Age 5 to 9 | 6.1% | 7.8% | 6.1% |
| Age 10 to 14 | 10.5% | 6.1% | 6.6% |
| Age 15 to 17 | 3.4% | 2.3% | 3.9% |
| Age 18 to 20 | 3.0% | 6.4% | 4.0% |
| Age 21 to 24 | 3.8% | 4.7% | 5.2% |
| Age 25 to 34 | 12.4% | 11.2% | 13.8% |
| Age 35 to 44 | 12.6% | 16.8% | 12.9% |
| Age 45 to 54 | 11.5% | 9.1% | 12.6% |
| Age 55 to 59 | 6.4% | 9.0% | 6.7% |
| Age 60 to 64 | 6.4% | 4.7% | 6.3% |
| Age 65 to 74 | 12.0% | 9.0% | 9.6% |
| Age 75 to 84 | 5.7% | 4.2% | 4.5% |
| Age 85 and over | 1.4% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Erie, MI | Mount Sterling, KY | United States |
| White | 92.7% | 92.4% | 59.4% |
| Black | 2.6% | 4.5% | 12.2% |
| Asian | 0.0% | 0.2% | 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 | 2.5% | 1.6% | 3.2% |
| Hispanic | 2.2% | 1.4% | 18.4% |
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| Marriage & Family | | | |
| | Erie, MI | Mount Sterling, KY | United States |
| Married Population | 59.4% | 46.4% | 49.8% |
| Currently Married | 59.4% | 38.3% | 48.0% |
| Married but Separated | 0.0% | 8.1% | 1.8% |
| Single Population | 40.6% | 53.6% | 50.2% |
| Never Married | 27.7% | 25.4% | 33.8% |
| Divorced | 9.4% | 18.7% | 10.8% |
| Widowed | 3.5% | 9.5% | 5.6% |
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| Household Size | 2.58 | 2.32 | 2.60 |
| Households | 1,672 | 3,157 | 124,010,992 |
| Family Households | 1,266 | 2,132 | 80,755,759 |
| Married couple, w/children | 24.6% | 17.2% | 30.5% |
| Married couple, no children | 53.6% | 34.1% | 42.9% |
| Non Family Households | 406 | 1,025 | 43,255,233 |
| Single householder, w/children | 16.8% | 30.2% | 15.8% |
| Single householder, no children | 5.1% | 18.4% | 10.8% |