| | Clinton, OK | Elk City, OK | United States |
| Population | 8,612 | 11,743 | 329,725,481 |
| Female Population | 49.1% | 51.5% | 50.5% |
| Male Population | 50.9% | 48.5% | 49.5% |
| Median Age | 37.7 | 34.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,041 | 11,672 | 309,327,143 |
| Population - 2000 | 8,833 | 10,510 | 285,036,114 |
| Population - 1990 | 9,298 | 10,428 | 251,960,433 |
| Pop. 2000 to Now | 1.3% | 8.0% | 15.6% |
| Pop. 1990 to Now | -3.7% | 8.9% | 30.8% |
| space4 | | | |
| Population Density | 916.0 | 721.5 | 93.4 |
| Land Area | 9.4 | 16.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Clinton, OK | Elk City, OK | United States |
| Age 0 to 4 | 6.3% | 7.3% | 5.9% |
| Age 5 to 9 | 8.6% | 6.9% | 6.1% |
| Age 10 to 14 | 5.6% | 6.5% | 6.6% |
| Age 15 to 17 | 5.2% | 4.2% | 3.9% |
| Age 18 to 20 | 1.2% | 2.3% | 4.0% |
| Age 21 to 24 | 6.0% | 7.0% | 5.2% |
| Age 25 to 34 | 10.1% | 16.2% | 13.8% |
| Age 35 to 44 | 16.5% | 11.4% | 12.9% |
| Age 45 to 54 | 14.3% | 9.9% | 12.6% |
| Age 55 to 59 | 5.0% | 5.3% | 6.7% |
| Age 60 to 64 | 7.2% | 6.9% | 6.3% |
| Age 65 to 74 | 7.2% | 9.0% | 9.6% |
| Age 75 to 84 | 4.0% | 5.6% | 4.5% |
| Age 85 and over | 2.9% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Clinton, OK | Elk City, OK | United States |
| White | 50.3% | 75.2% | 59.4% |
| Black | 7.1% | 2.1% | 12.2% |
| Asian | 1.5% | 1.2% | 5.6% |
| Native American | 4.3% | 2.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 2.9% | 1.0% | 3.2% |
| Hispanic | 33.9% | 17.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Clinton, OK | Elk City, OK | United States |
| Married Population | 53.6% | 51.7% | 49.8% |
| Currently Married | 52.0% | 50.3% | 48.0% |
| Married but Separated | 1.6% | 1.4% | 1.8% |
| Single Population | 46.4% | 48.3% | 50.2% |
| Never Married | 25.5% | 25.0% | 33.8% |
| Divorced | 13.0% | 16.3% | 10.8% |
| Widowed | 7.9% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.31 | 2.37 | 2.60 |
| Households | 3,605 | 4,876 | 124,010,992 |
| Family Households | 2,402 | 2,854 | 80,755,759 |
| Married couple, w/children | 39.4% | 28.3% | 30.5% |
| Married couple, no children | 33.1% | 44.8% | 42.9% |
| Non Family Households | 1,203 | 2,022 | 43,255,233 |
| Single householder, w/children | 22.3% | 20.6% | 15.8% |
| Single householder, no children | 5.2% | 6.3% | 10.8% |