| | St. Joseph charter, MI | Peachtree City, GA | United States |
| Population | 9,930 | 37,867 | 329,725,481 |
| Female Population | 49.6% | 52.8% | 50.5% |
| Male Population | 50.4% | 47.3% | 49.5% |
| Median Age | 45.7 | 42.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,022 | 34,538 | 309,327,143 |
| Population - 2000 | 10,042 | 31,580 | 285,036,114 |
| Population - 1990 | 9,613 | 19,027 | 251,960,433 |
| Pop. 2000 to Now | -4.0% | 16.4% | 15.6% |
| Pop. 1990 to Now | 0.3% | 93.2% | 30.8% |
| space4 | | | |
| Population Density | 1,493.7 | 1,541.9 | 93.4 |
| Land Area | 6.6 | 24.6 | 3,531,905.4 |
| Water Area | 0.3 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | St. Joseph charter, MI | Peachtree City, GA | United States |
| Age 0 to 4 | 6.7% | 3.9% | 5.9% |
| Age 5 to 9 | 5.7% | 5.7% | 6.1% |
| Age 10 to 14 | 4.0% | 9.2% | 6.6% |
| Age 15 to 17 | 3.4% | 6.3% | 3.9% |
| Age 18 to 20 | 1.6% | 3.2% | 4.0% |
| Age 21 to 24 | 2.2% | 4.3% | 5.2% |
| Age 25 to 34 | 12.6% | 7.8% | 13.8% |
| Age 35 to 44 | 12.6% | 12.5% | 12.9% |
| Age 45 to 54 | 10.8% | 14.4% | 12.6% |
| Age 55 to 59 | 7.7% | 7.4% | 6.7% |
| Age 60 to 64 | 9.0% | 6.9% | 6.3% |
| Age 65 to 74 | 13.9% | 10.4% | 9.6% |
| Age 75 to 84 | 6.5% | 5.7% | 4.5% |
| Age 85 and over | 3.4% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | St. Joseph charter, MI | Peachtree City, GA | United States |
| White | 78.2% | 73.2% | 59.4% |
| Black | 9.9% | 6.9% | 12.2% |
| Asian | 5.3% | 7.7% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.5% | 0.6% | 0.4% |
| Two or More Races | 2.4% | 3.4% | 3.2% |
| Hispanic | 3.7% | 8.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | St. Joseph charter, MI | Peachtree City, GA | United States |
| Married Population | 62.9% | 61.9% | 49.8% |
| Currently Married | 62.0% | 60.8% | 48.0% |
| Married but Separated | 1.0% | 1.1% | 1.8% |
| Single Population | 37.1% | 38.1% | 50.2% |
| Never Married | 19.6% | 24.4% | 33.8% |
| Divorced | 10.8% | 7.7% | 10.8% |
| Widowed | 6.6% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.37 | 2.63 | 2.60 |
| Households | 4,182 | 14,344 | 124,010,992 |
| Family Households | 2,885 | 10,611 | 80,755,759 |
| Married couple, w/children | 31.9% | 37.5% | 30.5% |
| Married couple, no children | 57.6% | 46.0% | 42.9% |
| Non Family Households | 1,297 | 3,733 | 43,255,233 |
| Single householder, w/children | 5.5% | 12.3% | 15.8% |
| Single householder, no children | 5.1% | 4.3% | 10.8% |