| | Decatur, TN | Andrews, NC | United States |
| Population | 1,841 | 1,937 | 329,725,481 |
| Female Population | 53.5% | 59.0% | 50.5% |
| Male Population | 46.6% | 41.0% | 49.5% |
| Median Age | 40.2 | 47 | 38.4 |
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| Population - 2010 | 1,645 | 1,775 | 309,327,143 |
| Population - 2000 | 1,395 | 1,602 | 285,036,114 |
| Population - 1990 | 1,361 | 2,551 | 251,960,433 |
| Pop. 2000 to Now | 19.2% | 15.8% | 15.6% |
| Pop. 1990 to Now | 22.2% | -27.3% | 30.8% |
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| Population Density | 485.0 | 1,139.4 | 93.4 |
| Land Area | 3.8 | 1.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Decatur, TN | Andrews, NC | United States |
| Age 0 to 4 | 7.9% | 2.9% | 5.9% |
| Age 5 to 9 | 6.1% | 3.5% | 6.1% |
| Age 10 to 14 | 4.0% | 8.5% | 6.6% |
| Age 15 to 17 | 4.6% | 4.5% | 3.9% |
| Age 18 to 20 | 4.1% | 2.0% | 4.0% |
| Age 21 to 24 | 7.3% | 11.6% | 5.2% |
| Age 25 to 34 | 10.6% | 4.0% | 13.8% |
| Age 35 to 44 | 14.4% | 8.8% | 12.9% |
| Age 45 to 54 | 10.0% | 20.8% | 12.6% |
| Age 55 to 59 | 6.6% | 5.7% | 6.7% |
| Age 60 to 64 | 3.6% | 2.5% | 6.3% |
| Age 65 to 74 | 10.8% | 13.3% | 9.6% |
| Age 75 to 84 | 8.3% | 8.1% | 4.5% |
| Age 85 and over | 1.6% | 3.8% | 1.9% |
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| Race | | | |
| | Decatur, TN | Andrews, NC | United States |
| White | 90.4% | 76.5% | 59.4% |
| Black | 3.7% | 5.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.3% | 1.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.0% | 1.5% | 3.2% |
| Hispanic | 1.7% | 15.5% | 18.4% |
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| Marriage & Family | | | |
| | Decatur, TN | Andrews, NC | United States |
| Married Population | 47.7% | 47.0% | 49.8% |
| Currently Married | 41.9% | 36.1% | 48.0% |
| Married but Separated | 5.8% | 10.9% | 1.8% |
| Single Population | 52.3% | 53.0% | 50.2% |
| Never Married | 30.6% | 21.5% | 33.8% |
| Divorced | 11.1% | 21.6% | 10.8% |
| Widowed | 10.5% | 9.9% | 5.6% |
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| Household Size | 2.40 | 2.10 | 2.60 |
| Households | 724 | 897 | 124,010,992 |
| Family Households | 446 | 410 | 80,755,759 |
| Married couple, w/children | 29.4% | 12.0% | 30.5% |
| Married couple, no children | 32.3% | 59.0% | 42.9% |
| Non Family Households | 278 | 487 | 43,255,233 |
| Single householder, w/children | 26.0% | 25.9% | 15.8% |
| Single householder, no children | 12.3% | 3.2% | 10.8% |