| | Lexington, TN | Dyersburg, TN | United States |
| Population | 7,849 | 16,235 | 329,725,481 |
| Female Population | 52.2% | 53.6% | 50.5% |
| Male Population | 47.8% | 46.4% | 49.5% |
| Median Age | 37.7 | 41.9 | 38.4 |
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| Population - 2010 | 7,655 | 17,124 | 309,327,143 |
| Population - 2000 | 7,393 | 17,452 | 285,036,114 |
| Population - 1990 | 5,810 | 16,317 | 251,960,433 |
| Pop. 2000 to Now | 6.4% | -7.9% | 15.6% |
| Pop. 1990 to Now | 35.4% | -1.4% | 30.8% |
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| Population Density | 679.9 | 937.3 | 93.4 |
| Land Area | 11.5 | 17.3 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lexington, TN | Dyersburg, TN | United States |
| Age 0 to 4 | 5.8% | 5.6% | 5.9% |
| Age 5 to 9 | 8.8% | 7.5% | 6.1% |
| Age 10 to 14 | 5.3% | 6.4% | 6.6% |
| Age 15 to 17 | 3.1% | 4.0% | 3.9% |
| Age 18 to 20 | 3.3% | 4.9% | 4.0% |
| Age 21 to 24 | 4.6% | 4.3% | 5.2% |
| Age 25 to 34 | 13.2% | 10.2% | 13.8% |
| Age 35 to 44 | 13.0% | 11.6% | 12.9% |
| Age 45 to 54 | 13.8% | 14.6% | 12.6% |
| Age 55 to 59 | 5.1% | 6.2% | 6.7% |
| Age 60 to 64 | 5.4% | 5.5% | 6.3% |
| Age 65 to 74 | 11.8% | 12.3% | 9.6% |
| Age 75 to 84 | 5.2% | 5.0% | 4.5% |
| Age 85 and over | 1.7% | 1.9% | 1.9% |
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| Race | | | |
| | Lexington, TN | Dyersburg, TN | United States |
| White | 79.5% | 67.4% | 59.4% |
| Black | 17.1% | 23.6% | 12.2% |
| Asian | 0.3% | 0.6% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.4% | 5.4% | 3.2% |
| Hispanic | 1.5% | 2.9% | 18.4% |
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| Marriage & Family | | | |
| | Lexington, TN | Dyersburg, TN | United States |
| Married Population | 46.9% | 44.6% | 49.8% |
| Currently Married | 46.0% | 41.0% | 48.0% |
| Married but Separated | 0.9% | 3.5% | 1.8% |
| Single Population | 53.1% | 55.4% | 50.2% |
| Never Married | 27.3% | 31.5% | 33.8% |
| Divorced | 17.6% | 14.0% | 10.8% |
| Widowed | 8.2% | 10.0% | 5.6% |
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| Household Size | 2.55 | 2.37 | 2.60 |
| Households | 2,919 | 6,631 | 124,010,992 |
| Family Households | 1,967 | 4,013 | 80,755,759 |
| Married couple, w/children | 37.0% | 23.6% | 30.5% |
| Married couple, no children | 33.2% | 39.4% | 42.9% |
| Non Family Households | 952 | 2,618 | 43,255,233 |
| Single householder, w/children | 11.9% | 22.9% | 15.8% |
| Single householder, no children | 17.9% | 14.0% | 10.8% |