| | Carl Junction, MO | Arkadelphia, AR | United States |
| Population | 8,099 | 10,332 | 329,725,481 |
| Female Population | 51.2% | 52.0% | 50.5% |
| Male Population | 48.8% | 48.0% | 49.5% |
| Median Age | 35.2 | 24.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,516 | 10,676 | 309,327,143 |
| Population - 2000 | 5,294 | 10,912 | 285,036,114 |
| Population - 1990 | 4,123 | 10,014 | 251,960,433 |
| Pop. 2000 to Now | 59.2% | -2.6% | 15.6% |
| Pop. 1990 to Now | 104.5% | 6.1% | 30.8% |
| space4 | | | |
| Population Density | 1,475.0 | 1,456.2 | 93.4 |
| Land Area | 5.5 | 7.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Carl Junction, MO | Arkadelphia, AR | United States |
| Age 0 to 4 | 5.8% | 5.4% | 5.9% |
| Age 5 to 9 | 10.7% | 2.7% | 6.1% |
| Age 10 to 14 | 10.9% | 6.0% | 6.6% |
| Age 15 to 17 | 5.8% | 3.1% | 3.9% |
| Age 18 to 20 | 2.0% | 19.2% | 4.0% |
| Age 21 to 24 | 2.2% | 15.0% | 5.2% |
| Age 25 to 34 | 12.2% | 11.7% | 13.8% |
| Age 35 to 44 | 14.3% | 8.1% | 12.9% |
| Age 45 to 54 | 11.1% | 7.3% | 12.6% |
| Age 55 to 59 | 7.2% | 3.8% | 6.7% |
| Age 60 to 64 | 3.4% | 4.4% | 6.3% |
| Age 65 to 74 | 9.0% | 7.5% | 9.6% |
| Age 75 to 84 | 3.9% | 3.8% | 4.5% |
| Age 85 and over | 1.4% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Carl Junction, MO | Arkadelphia, AR | United States |
| White | 92.2% | 58.2% | 59.4% |
| Black | 0.5% | 32.3% | 12.2% |
| Asian | 1.2% | 1.1% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 5.8% | 2.5% | 3.2% |
| Hispanic | 0.1% | 5.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Carl Junction, MO | Arkadelphia, AR | United States |
| Married Population | 56.8% | 29.7% | 49.8% |
| Currently Married | 56.7% | 27.0% | 48.0% |
| Married but Separated | 0.2% | 2.8% | 1.8% |
| Single Population | 43.2% | 70.3% | 50.2% |
| Never Married | 21.7% | 55.4% | 33.8% |
| Divorced | 13.5% | 7.2% | 10.8% |
| Widowed | 7.9% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 2.86 | 2.21 | 2.60 |
| Households | 2,824 | 3,684 | 124,010,992 |
| Family Households | 1,953 | 1,785 | 80,755,759 |
| Married couple, w/children | 40.5% | 23.9% | 30.5% |
| Married couple, no children | 37.5% | 36.6% | 42.9% |
| Non Family Households | 871 | 1,899 | 43,255,233 |
| Single householder, w/children | 19.2% | 21.2% | 15.8% |
| Single householder, no children | 2.8% | 18.3% | 10.8% |