| | Altus, AR | Walnut Ridge, AR | United States |
| Population | 898 | 5,392 | 329,725,481 |
| Female Population | 46.0% | 50.1% | 50.5% |
| Male Population | 54.0% | 49.9% | 49.5% |
| Median Age | 47 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 749 | 5,423 | 309,327,143 |
| Population - 2000 | 817 | 4,925 | 285,036,114 |
| Population - 1990 | 433 | 4,388 | 251,960,433 |
| Pop. 2000 to Now | -10.8% | 4.8% | 15.6% |
| Pop. 1990 to Now | 68.4% | 17.6% | 30.8% |
| space4 | | | |
| Population Density | 479.7 | 329.3 | 93.4 |
| Land Area | 1.9 | 16.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Altus, AR | Walnut Ridge, AR | United States |
| Age 0 to 4 | 5.3% | 4.9% | 5.9% |
| Age 5 to 9 | 9.0% | 8.4% | 6.1% |
| Age 10 to 14 | 7.5% | 4.6% | 6.6% |
| Age 15 to 17 | 2.7% | 4.0% | 3.9% |
| Age 18 to 20 | 3.5% | 5.7% | 4.0% |
| Age 21 to 24 | 4.5% | 7.3% | 5.2% |
| Age 25 to 34 | 8.1% | 12.9% | 13.8% |
| Age 35 to 44 | 7.0% | 10.3% | 12.9% |
| Age 45 to 54 | 19.6% | 11.9% | 12.6% |
| Age 55 to 59 | 6.8% | 6.4% | 6.7% |
| Age 60 to 64 | 7.1% | 6.1% | 6.3% |
| Age 65 to 74 | 12.1% | 7.8% | 9.6% |
| Age 75 to 84 | 4.5% | 5.6% | 4.5% |
| Age 85 and over | 2.3% | 4.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Altus, AR | Walnut Ridge, AR | United States |
| White | 84.5% | 92.9% | 59.4% |
| Black | 0.2% | 2.6% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 1.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 12.4% | 1.0% | 3.2% |
| Hispanic | 1.8% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Altus, AR | Walnut Ridge, AR | United States |
| Married Population | 46.4% | 46.4% | 49.8% |
| Currently Married | 37.5% | 44.3% | 48.0% |
| Married but Separated | 9.0% | 2.1% | 1.8% |
| Single Population | 53.6% | 53.6% | 50.2% |
| Never Married | 22.9% | 32.8% | 33.8% |
| Divorced | 15.0% | 13.9% | 10.8% |
| Widowed | 15.7% | 6.9% | 5.6% |
| space5 | | | |
| Household Size | 2.66 | 2.37 | 2.60 |
| Households | 338 | 2,072 | 124,010,992 |
| Family Households | 173 | 1,283 | 80,755,759 |
| Married couple, w/children | 20.8% | 36.6% | 30.5% |
| Married couple, no children | 34.7% | 37.6% | 42.9% |
| Non Family Households | 165 | 789 | 43,255,233 |
| Single householder, w/children | 30.6% | 18.3% | 15.8% |
| Single householder, no children | 13.9% | 7.5% | 10.8% |