| | Killen, AL | Lawton, OK | United States |
| Population | 1,209 | 91,247 | 329,725,481 |
| Female Population | 53.3% | 47.9% | 50.5% |
| Male Population | 46.7% | 52.2% | 49.5% |
| Median Age | 42.1 | 31.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 999 | 97,850 | 309,327,143 |
| Population - 2000 | 1,119 | 92,757 | 285,036,114 |
| Population - 1990 | 1,047 | 80,561 | 251,960,433 |
| Pop. 2000 to Now | -14.0% | 0.4% | 15.6% |
| Pop. 1990 to Now | -8.1% | 15.6% | 30.8% |
| space4 | | | |
| Population Density | 597.0 | 1,121.1 | 93.4 |
| Land Area | 2.0 | 81.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Killen, AL | Lawton, OK | United States |
| Age 0 to 4 | 5.8% | 7.4% | 5.9% |
| Age 5 to 9 | 8.1% | 6.7% | 6.1% |
| Age 10 to 14 | 5.8% | 6.3% | 6.6% |
| Age 15 to 17 | 2.0% | 3.5% | 3.9% |
| Age 18 to 20 | 3.6% | 5.8% | 4.0% |
| Age 21 to 24 | 5.7% | 8.0% | 5.2% |
| Age 25 to 34 | 9.3% | 17.9% | 13.8% |
| Age 35 to 44 | 13.3% | 12.8% | 12.9% |
| Age 45 to 54 | 12.8% | 9.9% | 12.6% |
| Age 55 to 59 | 5.1% | 5.4% | 6.7% |
| Age 60 to 64 | 6.5% | 5.2% | 6.3% |
| Age 65 to 74 | 14.0% | 6.6% | 9.6% |
| Age 75 to 84 | 4.6% | 3.3% | 4.5% |
| Age 85 and over | 3.3% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Killen, AL | Lawton, OK | United States |
| White | 91.3% | 49.1% | 59.4% |
| Black | 4.1% | 17.8% | 12.2% |
| Asian | 0.0% | 2.9% | 5.6% |
| Native American | 0.0% | 4.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.5% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 2.0% | 9.6% | 3.2% |
| Hispanic | 2.6% | 15.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Killen, AL | Lawton, OK | United States |
| Married Population | 50.7% | 43.5% | 49.8% |
| Currently Married | 49.2% | 39.9% | 48.0% |
| Married but Separated | 1.4% | 3.6% | 1.8% |
| Single Population | 49.3% | 56.5% | 50.2% |
| Never Married | 21.0% | 36.8% | 33.8% |
| Divorced | 17.4% | 13.7% | 10.8% |
| Widowed | 10.9% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.80 | 2.50 | 2.60 |
| Households | 432 | 32,977 | 124,010,992 |
| Family Households | 320 | 20,051 | 80,755,759 |
| Married couple, w/children | 31.3% | 29.1% | 30.5% |
| Married couple, no children | 41.9% | 33.5% | 42.9% |
| Non Family Households | 112 | 12,926 | 43,255,233 |
| Single householder, w/children | 7.2% | 27.5% | 15.8% |
| Single householder, no children | 19.7% | 9.9% | 10.8% |