| | Townsend, TN | Sycamore, IL | United States |
| Population | 597 | 18,144 | 329,725,481 |
| Female Population | 47.7% | 54.5% | 50.5% |
| Male Population | 52.3% | 45.5% | 49.5% |
| Median Age | 62.1 | 37.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 420 | 17,523 | 309,327,143 |
| Population - 2000 | 244 | 12,020 | 285,036,114 |
| Population - 1990 | 329 | 9,708 | 251,960,433 |
| Pop. 2000 to Now | 95.5% | 52.4% | 15.6% |
| Pop. 1990 to Now | 45.0% | 88.7% | 30.8% |
| space4 | | | |
| Population Density | 299.6 | 1,843.2 | 93.4 |
| Land Area | 2.0 | 9.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Townsend, TN | Sycamore, IL | United States |
| Age 0 to 4 | 9.9% | 5.7% | 5.9% |
| Age 5 to 9 | 2.7% | 6.4% | 6.1% |
| Age 10 to 14 | 1.8% | 7.9% | 6.6% |
| Age 15 to 17 | 0.0% | 5.1% | 3.9% |
| Age 18 to 20 | 0.0% | 4.6% | 4.0% |
| Age 21 to 24 | 4.0% | 5.2% | 5.2% |
| Age 25 to 34 | 16.1% | 12.3% | 13.8% |
| Age 35 to 44 | 4.9% | 13.8% | 12.9% |
| Age 45 to 54 | 1.0% | 12.9% | 12.6% |
| Age 55 to 59 | 5.4% | 6.0% | 6.7% |
| Age 60 to 64 | 17.1% | 7.0% | 6.3% |
| Age 65 to 74 | 28.6% | 7.5% | 9.6% |
| Age 75 to 84 | 7.2% | 4.7% | 4.5% |
| Age 85 and over | 1.3% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Townsend, TN | Sycamore, IL | United States |
| White | 98.2% | 86.5% | 59.4% |
| Black | 0.0% | 3.5% | 12.2% |
| Asian | 0.5% | 1.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.2% | 0.8% | 3.2% |
| Hispanic | 1.2% | 7.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Townsend, TN | Sycamore, IL | United States |
| Married Population | 81.8% | 52.6% | 49.8% |
| Currently Married | 78.5% | 51.0% | 48.0% |
| Married but Separated | 3.3% | 1.7% | 1.8% |
| Single Population | 18.2% | 47.4% | 50.2% |
| Never Married | 1.4% | 32.3% | 33.8% |
| Divorced | 10.4% | 11.0% | 10.8% |
| Widowed | 6.5% | 4.1% | 5.6% |
| space5 | | | |
| Household Size | 2.15 | 2.45 | 2.60 |
| Households | 278 | 7,328 | 124,010,992 |
| Family Households | 214 | 4,901 | 80,755,759 |
| Married couple, w/children | 30.8% | 29.4% | 30.5% |
| Married couple, no children | 66.8% | 44.9% | 42.9% |
| Non Family Households | 64 | 2,427 | 43,255,233 |
| Single householder, w/children | 0.9% | 18.7% | 15.8% |
| Single householder, no children | 1.4% | 7.0% | 10.8% |