| | Auburn, KY | Russellville, KY | United States |
| Population | 1,619 | 7,068 | 329,725,481 |
| Female Population | 47.1% | 55.8% | 50.5% |
| Male Population | 52.9% | 44.2% | 49.5% |
| Median Age | 36.1 | 36.3 | 38.4 |
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| Population - 2010 | 1,356 | 6,946 | 309,327,143 |
| Population - 2000 | 1,444 | 7,149 | 285,036,114 |
| Population - 1990 | 1,273 | 7,454 | 251,960,433 |
| Pop. 2000 to Now | -2.8% | 0.3% | 15.6% |
| Pop. 1990 to Now | 10.3% | -3.9% | 30.8% |
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| Population Density | 870.4 | 651.9 | 93.4 |
| Land Area | 1.9 | 10.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Auburn, KY | Russellville, KY | United States |
| Age 0 to 4 | 7.4% | 5.3% | 5.9% |
| Age 5 to 9 | 8.2% | 9.6% | 6.1% |
| Age 10 to 14 | 1.8% | 5.9% | 6.6% |
| Age 15 to 17 | 2.5% | 4.2% | 3.9% |
| Age 18 to 20 | 5.4% | 3.0% | 4.0% |
| Age 21 to 24 | 10.7% | 3.8% | 5.2% |
| Age 25 to 34 | 12.3% | 13.3% | 13.8% |
| Age 35 to 44 | 12.4% | 13.1% | 12.9% |
| Age 45 to 54 | 11.7% | 10.1% | 12.6% |
| Age 55 to 59 | 3.3% | 6.5% | 6.7% |
| Age 60 to 64 | 3.4% | 3.9% | 6.3% |
| Age 65 to 74 | 8.4% | 11.9% | 9.6% |
| Age 75 to 84 | 9.7% | 6.7% | 4.5% |
| Age 85 and over | 2.8% | 2.6% | 1.9% |
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| Race | | | |
| | Auburn, KY | Russellville, KY | United States |
| White | 78.8% | 77.6% | 59.4% |
| Black | 6.5% | 15.8% | 12.2% |
| Asian | 0.0% | 1.1% | 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 | 5.6% | 0.7% | 3.2% |
| Hispanic | 9.1% | 4.8% | 18.4% |
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| Marriage & Family | | | |
| | Auburn, KY | Russellville, KY | United States |
| Married Population | 35.8% | 50.0% | 49.8% |
| Currently Married | 35.2% | 47.1% | 48.0% |
| Married but Separated | 0.6% | 2.8% | 1.8% |
| Single Population | 64.2% | 50.0% | 50.2% |
| Never Married | 29.4% | 25.2% | 33.8% |
| Divorced | 19.7% | 15.4% | 10.8% |
| Widowed | 15.1% | 9.5% | 5.6% |
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| Household Size | 2.16 | 2.21 | 2.60 |
| Households | 728 | 3,083 | 124,010,992 |
| Family Households | 332 | 1,876 | 80,755,759 |
| Married couple, w/children | 24.4% | 31.4% | 30.5% |
| Married couple, no children | 34.0% | 35.7% | 42.9% |
| Non Family Households | 396 | 1,207 | 43,255,233 |
| Single householder, w/children | 22.6% | 19.2% | 15.8% |
| Single householder, no children | 19.0% | 13.7% | 10.8% |