| | Cowan, TN | Estill Springs, TN | United States |
| Population | 1,545 | 2,024 | 329,725,481 |
| Female Population | 49.2% | 50.4% | 50.5% |
| Male Population | 50.8% | 49.7% | 49.5% |
| Median Age | 37.5 | 39.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,730 | 2,024 | 309,327,143 |
| Population - 2000 | 1,770 | 2,152 | 285,036,114 |
| Population - 1990 | 1,738 | 1,408 | 251,960,433 |
| Pop. 2000 to Now | -5.8% | -5.2% | 15.6% |
| Pop. 1990 to Now | -4.0% | 44.9% | 30.8% |
| space4 | | | |
| Population Density | 743.5 | 456.2 | 93.4 |
| Land Area | 2.1 | 4.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Cowan, TN | Estill Springs, TN | United States |
| Age 0 to 4 | 9.3% | 5.2% | 5.9% |
| Age 5 to 9 | 5.8% | 14.4% | 6.1% |
| Age 10 to 14 | 3.3% | 3.2% | 6.6% |
| Age 15 to 17 | 10.9% | 5.9% | 3.9% |
| Age 18 to 20 | 3.3% | 3.4% | 4.0% |
| Age 21 to 24 | 5.2% | 0.0% | 5.2% |
| Age 25 to 34 | 9.6% | 12.4% | 13.8% |
| Age 35 to 44 | 7.2% | 12.4% | 12.9% |
| Age 45 to 54 | 11.9% | 13.6% | 12.6% |
| Age 55 to 59 | 8.9% | 6.4% | 6.7% |
| Age 60 to 64 | 6.3% | 7.6% | 6.3% |
| Age 65 to 74 | 13.3% | 8.5% | 9.6% |
| Age 75 to 84 | 3.5% | 5.6% | 4.5% |
| Age 85 and over | 1.4% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Cowan, TN | Estill Springs, TN | United States |
| White | 84.1% | 89.4% | 59.4% |
| Black | 9.3% | 3.2% | 12.2% |
| Asian | 0.1% | 1.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 5.2% | 5.2% | 3.2% |
| Hispanic | 1.2% | 0.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Cowan, TN | Estill Springs, TN | United States |
| Married Population | 52.9% | 54.4% | 49.8% |
| Currently Married | 38.2% | 52.1% | 48.0% |
| Married but Separated | 14.8% | 2.3% | 1.8% |
| Single Population | 47.1% | 45.6% | 50.2% |
| Never Married | 22.9% | 18.9% | 33.8% |
| Divorced | 18.9% | 19.4% | 10.8% |
| Widowed | 5.3% | 7.4% | 5.6% |
| space5 | | | |
| Household Size | 2.34 | 2.54 | 2.60 |
| Households | 655 | 797 | 124,010,992 |
| Family Households | 387 | 587 | 80,755,759 |
| Married couple, w/children | 18.3% | 29.8% | 30.5% |
| Married couple, no children | 38.5% | 36.3% | 42.9% |
| Non Family Households | 268 | 210 | 43,255,233 |
| Single householder, w/children | 29.7% | 25.2% | 15.8% |
| Single householder, no children | 13.4% | 8.7% | 10.8% |