| | Killen, AL | Hookstown, PA | United States |
| Population | 1,209 | 122 | 329,725,481 |
| Female Population | 53.3% | 34.4% | 50.5% |
| Male Population | 46.7% | 65.6% | 49.5% |
| Median Age | 42.1 | 49.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 999 | 147 | 309,327,143 |
| Population - 2000 | 1,119 | 152 | 285,036,114 |
| Population - 1990 | 1,047 | 169 | 251,960,433 |
| Pop. 2000 to Now | -14.0% | -9.9% | 15.6% |
| Pop. 1990 to Now | -8.1% | -18.9% | 30.8% |
| space4 | | | |
| Population Density | 597.0 | 903.7 | 93.4 |
| Land Area | 2.0 | 0.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Killen, AL | Hookstown, PA | United States |
| Age 0 to 4 | 5.8% | 4.1% | 5.9% |
| Age 5 to 9 | 8.1% | 8.2% | 6.1% |
| Age 10 to 14 | 5.8% | 3.3% | 6.6% |
| Age 15 to 17 | 2.0% | 4.1% | 3.9% |
| Age 18 to 20 | 3.6% | 0.0% | 4.0% |
| Age 21 to 24 | 5.7% | 4.1% | 5.2% |
| Age 25 to 34 | 9.3% | 9.8% | 13.8% |
| Age 35 to 44 | 13.3% | 9.0% | 12.9% |
| Age 45 to 54 | 12.8% | 9.0% | 12.6% |
| Age 55 to 59 | 5.1% | 8.2% | 6.7% |
| Age 60 to 64 | 6.5% | 13.9% | 6.3% |
| Age 65 to 74 | 14.0% | 26.2% | 9.6% |
| Age 75 to 84 | 4.6% | 0.0% | 4.5% |
| Age 85 and over | 3.3% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Killen, AL | Hookstown, PA | United States |
| White | 91.3% | 95.1% | 59.4% |
| Black | 4.1% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 2.0% | 0.0% | 3.2% |
| Hispanic | 2.6% | 4.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Killen, AL | Hookstown, PA | United States |
| Married Population | 50.7% | 56.3% | 49.8% |
| Currently Married | 49.2% | 56.3% | 48.0% |
| Married but Separated | 1.4% | 0.0% | 1.8% |
| Single Population | 49.3% | 43.7% | 50.2% |
| Never Married | 21.0% | 25.2% | 33.8% |
| Divorced | 17.4% | 11.7% | 10.8% |
| Widowed | 10.9% | 6.8% | 5.6% |
| space5 | | | |
| Household Size | 2.80 | 2.07 | 2.60 |
| Households | 432 | 59 | 124,010,992 |
| Family Households | 320 | 38 | 80,755,759 |
| Married couple, w/children | 31.3% | 23.7% | 30.5% |
| Married couple, no children | 41.9% | 55.3% | 42.9% |
| Non Family Households | 112 | 21 | 43,255,233 |
| Single householder, w/children | 7.2% | 7.9% | 15.8% |
| Single householder, no children | 19.7% | 13.2% | 10.8% |