| | Blue Mountain, AR | Alma, AR | United States |
| Population | 160 | 5,806 | 329,725,481 |
| Female Population | 51.9% | 48.9% | 50.5% |
| Male Population | 48.1% | 51.1% | 49.5% |
| Median Age | 24.5 | 24.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 124 | 5,524 | 309,327,143 |
| Population - 2000 | 132 | 4,160 | 285,036,114 |
| Population - 1990 | 146 | 2,959 | 251,960,433 |
| Pop. 2000 to Now | -9.1% | 41.5% | 15.6% |
| Pop. 1990 to Now | -17.8% | 99.0% | 30.8% |
| space4 | | | |
| Population Density | 149.3 | 1,012.9 | 93.4 |
| Land Area | 1.1 | 5.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Blue Mountain, AR | Alma, AR | United States |
| Age 0 to 4 | 1.9% | 7.0% | 5.9% |
| Age 5 to 9 | 37.5% | 14.6% | 6.1% |
| Age 10 to 14 | 4.4% | 11.1% | 6.6% |
| Age 15 to 17 | 2.5% | 4.9% | 3.9% |
| Age 18 to 20 | 0.0% | 4.7% | 4.0% |
| Age 21 to 24 | 8.1% | 7.8% | 5.2% |
| Age 25 to 34 | 4.4% | 9.1% | 13.8% |
| Age 35 to 44 | 3.8% | 11.7% | 12.9% |
| Age 45 to 54 | 18.8% | 7.8% | 12.6% |
| Age 55 to 59 | 5.0% | 4.6% | 6.7% |
| Age 60 to 64 | 7.5% | 3.6% | 6.3% |
| Age 65 to 74 | 5.0% | 7.3% | 9.6% |
| Age 75 to 84 | 0.6% | 3.7% | 4.5% |
| Age 85 and over | 0.6% | 2.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Blue Mountain, AR | Alma, AR | United States |
| White | 54.4% | 85.4% | 59.4% |
| Black | 20.0% | 3.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 1.3% | 2.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 20.0% | 4.6% | 3.2% |
| Hispanic | 4.4% | 4.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Blue Mountain, AR | Alma, AR | United States |
| Married Population | 54.4% | 44.6% | 49.8% |
| Currently Married | 52.2% | 40.6% | 48.0% |
| Married but Separated | 2.2% | 4.0% | 1.8% |
| Single Population | 45.6% | 55.4% | 50.2% |
| Never Married | 24.4% | 33.4% | 33.8% |
| Divorced | 21.1% | 16.3% | 10.8% |
| Widowed | 0.0% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 4.21 | 3.07 | 2.60 |
| Households | 38 | 1,873 | 124,010,992 |
| Family Households | 30 | 1,335 | 80,755,759 |
| Married couple, w/children | 56.7% | 21.7% | 30.5% |
| Married couple, no children | 26.7% | 33.9% | 42.9% |
| Non Family Households | 8 | 538 | 43,255,233 |
| Single householder, w/children | 6.7% | 36.4% | 15.8% |
| Single householder, no children | 10.0% | 8.0% | 10.8% |