| | Atlanta, MO | Aurora, MO | United States |
| Population | 566 | 7,268 | 329,725,481 |
| Female Population | 51.1% | 49.1% | 50.5% |
| Male Population | 48.9% | 50.9% | 49.5% |
| Median Age | 35.1 | 39.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 395 | 7,531 | 309,327,143 |
| Population - 2000 | 450 | 7,014 | 285,036,114 |
| Population - 1990 | 411 | 6,459 | 251,960,433 |
| Pop. 2000 to Now | -14.7% | 6.0% | 15.6% |
| Pop. 1990 to Now | -6.6% | 15.1% | 30.8% |
| space4 | | | |
| Population Density | 1,655.0 | 1,155.7 | 93.4 |
| Land Area | 0.3 | 6.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Atlanta, MO | Aurora, MO | United States |
| Age 0 to 4 | 11.0% | 7.8% | 5.9% |
| Age 5 to 9 | 9.5% | 7.2% | 6.1% |
| Age 10 to 14 | 9.7% | 5.1% | 6.6% |
| Age 15 to 17 | 2.7% | 5.0% | 3.9% |
| Age 18 to 20 | 3.9% | 2.8% | 4.0% |
| Age 21 to 24 | 3.0% | 5.8% | 5.2% |
| Age 25 to 34 | 10.1% | 12.2% | 13.8% |
| Age 35 to 44 | 17.7% | 9.7% | 12.9% |
| Age 45 to 54 | 11.0% | 10.0% | 12.6% |
| Age 55 to 59 | 6.9% | 7.7% | 6.7% |
| Age 60 to 64 | 6.0% | 8.4% | 6.3% |
| Age 65 to 74 | 5.8% | 9.5% | 9.6% |
| Age 75 to 84 | 2.7% | 7.1% | 4.5% |
| Age 85 and over | 0.2% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Atlanta, MO | Aurora, MO | United States |
| White | 90.3% | 88.8% | 59.4% |
| Black | 1.8% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 6.2% | 5.0% | 3.2% |
| Hispanic | 1.8% | 5.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Atlanta, MO | Aurora, MO | United States |
| Married Population | 51.4% | 52.2% | 49.8% |
| Currently Married | 48.9% | 49.2% | 48.0% |
| Married but Separated | 2.5% | 3.1% | 1.8% |
| Single Population | 48.6% | 47.8% | 50.2% |
| Never Married | 23.0% | 21.7% | 33.8% |
| Divorced | 18.7% | 21.2% | 10.8% |
| Widowed | 6.8% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 3.20 | 2.36 | 2.60 |
| Households | 177 | 3,051 | 124,010,992 |
| Family Households | 118 | 1,891 | 80,755,759 |
| Married couple, w/children | 29.7% | 31.3% | 30.5% |
| Married couple, no children | 39.0% | 39.6% | 42.9% |
| Non Family Households | 59 | 1,160 | 43,255,233 |
| Single householder, w/children | 23.7% | 17.9% | 15.8% |
| Single householder, no children | 7.6% | 11.3% | 10.8% |