| | Lexington, OH | Ashland, OH | United States |
| Population | 4,994 | 19,544 | 329,725,481 |
| Female Population | 50.8% | 52.6% | 50.5% |
| Male Population | 49.2% | 47.4% | 49.5% |
| Median Age | 47.6 | 36.4 | 38.4 |
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| Population - 2010 | 4,795 | 20,526 | 309,327,143 |
| Population - 2000 | 4,165 | 21,249 | 285,036,114 |
| Population - 1990 | 4,124 | 20,079 | 251,960,433 |
| Pop. 2000 to Now | 12.7% | -6.0% | 15.6% |
| Pop. 1990 to Now | 13.9% | -0.5% | 30.8% |
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| Population Density | 1,299.5 | 1,725.4 | 93.4 |
| Land Area | 3.8 | 11.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lexington, OH | Ashland, OH | United States |
| Age 0 to 4 | 2.0% | 5.1% | 5.9% |
| Age 5 to 9 | 8.5% | 5.3% | 6.1% |
| Age 10 to 14 | 5.0% | 7.0% | 6.6% |
| Age 15 to 17 | 1.6% | 3.5% | 3.9% |
| Age 18 to 20 | 4.5% | 7.4% | 4.0% |
| Age 21 to 24 | 3.6% | 7.4% | 5.2% |
| Age 25 to 34 | 11.0% | 12.8% | 13.8% |
| Age 35 to 44 | 11.2% | 11.3% | 12.9% |
| Age 45 to 54 | 9.0% | 9.2% | 12.6% |
| Age 55 to 59 | 10.1% | 5.0% | 6.7% |
| Age 60 to 64 | 12.8% | 6.8% | 6.3% |
| Age 65 to 74 | 12.8% | 9.5% | 9.6% |
| Age 75 to 84 | 5.7% | 7.1% | 4.5% |
| Age 85 and over | 2.2% | 2.8% | 1.9% |
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| Race | | | |
| | Lexington, OH | Ashland, OH | United States |
| White | 96.5% | 91.8% | 59.4% |
| Black | 1.8% | 1.8% | 12.2% |
| Asian | 0.3% | 1.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.2% | 2.8% | 3.2% |
| Hispanic | 1.2% | 2.3% | 18.4% |
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| Marriage & Family | | | |
| | Lexington, OH | Ashland, OH | United States |
| Married Population | 56.1% | 46.3% | 49.8% |
| Currently Married | 54.8% | 44.5% | 48.0% |
| Married but Separated | 1.2% | 1.8% | 1.8% |
| Single Population | 43.9% | 53.7% | 50.2% |
| Never Married | 21.4% | 34.2% | 33.8% |
| Divorced | 15.8% | 12.0% | 10.8% |
| Widowed | 6.7% | 7.6% | 5.6% |
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| Household Size | 2.18 | 2.16 | 2.60 |
| Households | 2,249 | 8,189 | 124,010,992 |
| Family Households | 1,363 | 4,593 | 80,755,759 |
| Married couple, w/children | 17.2% | 28.8% | 30.5% |
| Married couple, no children | 66.8% | 45.7% | 42.9% |
| Non Family Households | 886 | 3,596 | 43,255,233 |
| Single householder, w/children | 8.8% | 18.0% | 15.8% |
| Single householder, no children | 7.1% | 7.6% | 10.8% |