| | Erwin, TN | Lexington, NC | United States |
| Population | 6,052 | 19,347 | 329,725,481 |
| Female Population | 48.2% | 51.1% | 50.5% |
| Male Population | 51.8% | 48.9% | 49.5% |
| Median Age | 45 | 38.3 | 38.4 |
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| Population - 2010 | 6,077 | 18,935 | 309,327,143 |
| Population - 2000 | 5,610 | 19,953 | 285,036,114 |
| Population - 1990 | 5,015 | 16,581 | 251,960,433 |
| Pop. 2000 to Now | 4.4% | -4.1% | 15.6% |
| Pop. 1990 to Now | 16.7% | 15.4% | 30.8% |
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| Population Density | 1,466.8 | 1,076.1 | 93.4 |
| Land Area | 4.1 | 18.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Erwin, TN | Lexington, NC | United States |
| Age 0 to 4 | 1.5% | 7.6% | 5.9% |
| Age 5 to 9 | 5.2% | 6.8% | 6.1% |
| Age 10 to 14 | 5.5% | 6.3% | 6.6% |
| Age 15 to 17 | 5.8% | 3.3% | 3.9% |
| Age 18 to 20 | 2.3% | 2.2% | 4.0% |
| Age 21 to 24 | 7.4% | 4.7% | 5.2% |
| Age 25 to 34 | 8.7% | 15.5% | 13.8% |
| Age 35 to 44 | 13.8% | 11.1% | 12.9% |
| Age 45 to 54 | 16.4% | 12.4% | 12.6% |
| Age 55 to 59 | 4.5% | 8.6% | 6.7% |
| Age 60 to 64 | 6.8% | 6.5% | 6.3% |
| Age 65 to 74 | 10.2% | 8.9% | 9.6% |
| Age 75 to 84 | 7.8% | 4.0% | 4.5% |
| Age 85 and over | 4.1% | 2.0% | 1.9% |
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| Race | | | |
| | Erwin, TN | Lexington, NC | United States |
| White | 87.7% | 49.6% | 59.4% |
| Black | 0.3% | 28.3% | 12.2% |
| Asian | 0.0% | 3.3% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 1.3% | 4.0% | 3.2% |
| Hispanic | 10.6% | 14.0% | 18.4% |
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| Marriage & Family | | | |
| | Erwin, TN | Lexington, NC | United States |
| Married Population | 54.1% | 43.3% | 49.8% |
| Currently Married | 52.1% | 38.1% | 48.0% |
| Married but Separated | 1.9% | 5.2% | 1.8% |
| Single Population | 45.9% | 56.7% | 50.2% |
| Never Married | 25.7% | 35.8% | 33.8% |
| Divorced | 12.8% | 13.5% | 10.8% |
| Widowed | 7.4% | 7.3% | 5.6% |
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| Household Size | 2.24 | 2.37 | 2.60 |
| Households | 2,600 | 7,811 | 124,010,992 |
| Family Households | 1,757 | 4,880 | 80,755,759 |
| Married couple, w/children | 29.4% | 17.5% | 30.5% |
| Married couple, no children | 48.6% | 35.2% | 42.9% |
| Non Family Households | 843 | 2,931 | 43,255,233 |
| Single householder, w/children | 12.6% | 33.8% | 15.8% |
| Single householder, no children | 9.4% | 13.5% | 10.8% |