| | Ozark, AR | Mount Vernon, MO | United States |
| Population | 3,559 | 4,470 | 329,725,481 |
| Female Population | 54.3% | 53.1% | 50.5% |
| Male Population | 45.7% | 46.9% | 49.5% |
| Median Age | 34.4 | 43.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,705 | 4,564 | 309,327,143 |
| Population - 2000 | 3,525 | 4,017 | 285,036,114 |
| Population - 1990 | 3,330 | 3,726 | 251,960,433 |
| Pop. 2000 to Now | 2.9% | 11.5% | 15.6% |
| Pop. 1990 to Now | 8.9% | 20.2% | 30.8% |
| space4 | | | |
| Population Density | 461.0 | 1,124.5 | 93.4 |
| Land Area | 7.7 | 4.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ozark, AR | Mount Vernon, MO | United States |
| Age 0 to 4 | 8.4% | 4.4% | 5.9% |
| Age 5 to 9 | 5.9% | 6.9% | 6.1% |
| Age 10 to 14 | 7.6% | 5.5% | 6.6% |
| Age 15 to 17 | 0.1% | 2.6% | 3.9% |
| Age 18 to 20 | 2.7% | 2.8% | 4.0% |
| Age 21 to 24 | 4.9% | 4.0% | 5.2% |
| Age 25 to 34 | 21.9% | 11.0% | 13.8% |
| Age 35 to 44 | 10.9% | 13.2% | 12.9% |
| Age 45 to 54 | 9.7% | 14.0% | 12.6% |
| Age 55 to 59 | 2.4% | 4.0% | 6.7% |
| Age 60 to 64 | 4.2% | 7.2% | 6.3% |
| Age 65 to 74 | 11.7% | 11.6% | 9.6% |
| Age 75 to 84 | 8.2% | 6.9% | 4.5% |
| Age 85 and over | 1.6% | 5.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ozark, AR | Mount Vernon, MO | United States |
| White | 96.4% | 92.0% | 59.4% |
| Black | 1.1% | 0.8% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 2.3% | 3.2% |
| Hispanic | 0.6% | 5.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ozark, AR | Mount Vernon, MO | United States |
| Married Population | 48.2% | 47.3% | 49.8% |
| Currently Married | 45.6% | 43.6% | 48.0% |
| Married but Separated | 2.7% | 3.7% | 1.8% |
| Single Population | 51.8% | 52.7% | 50.2% |
| Never Married | 20.1% | 22.4% | 33.8% |
| Divorced | 22.9% | 15.7% | 10.8% |
| Widowed | 8.8% | 14.6% | 5.6% |
| space5 | | | |
| Household Size | 2.30 | 2.19 | 2.60 |
| Households | 1,491 | 1,863 | 124,010,992 |
| Family Households | 878 | 925 | 80,755,759 |
| Married couple, w/children | 38.0% | 29.7% | 30.5% |
| Married couple, no children | 31.5% | 44.3% | 42.9% |
| Non Family Households | 613 | 938 | 43,255,233 |
| Single householder, w/children | 19.9% | 18.6% | 15.8% |
| Single householder, no children | 10.5% | 7.4% | 10.8% |