| PEOPLE | St. Joseph | Aurora | United States |
| Population | 76,780 | 197,899 | 308,035,306 |
| Pop. Density | 1,745 | 4,404 | 87 |
| Pop. Change | 1.95% | 36.25% | 8.07% |
| Median Age | 35.6 | 30.7 | 37.3 |
| Households | 29,727 | 62,564 | 116,716,292 |
| Household Size | 2.44 | 3.12 | 2.58 |
| Male Population | 49.81% | 49.61% | 49.27% |
| Female Population | 50.19% | 50.39% | 50.96% |
| Married Population | 43.28% | 49.36% | 47.02% |
| Single Population | 56.72% | 50.64% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.07% | 9.14% | 6.56% |
| Age 5 to 9 | 6.49% | 9.27% | 6.61% |
| Age 10 to 14 | 6.13% | 8.36% | 6.71% |
| Age 15 to 17 | 3.94% | 4.80% | 4.21% |
| Age 18 to 20 | 3.23% | 2.73% | 2.95% |
| Age 21 to 24 | 8.36% | 6.32% | 7.01% |
| Age 25 to 34 | 14.03% | 16.78% | 13.33% |
| Age 35 to 44 | 12.00% | 16.09% | 13.33% |
| Age 45 to 49 | 13.93% | 12.28% | 14.61% |
| Age 50 to 54 | 13.93% | 12.28% | 14.61% |
| Age 55 to 59 | 10.99% | 7.76% | 11.84% |
| Age 60 to 64 | 10.99% | 7.76% | 11.84% |
| Age 65 to 74 | 6.73% | 3.69% | 7.05% |
| Age 75 to 84 | 4.70% | 1.89% | 4.24% |
| Age 85 and over | 2.38% | 0.88% | 1.78% |
| RACE | | | |
| White | 87.76% | 59.71% | 72.41% |
| Black | 5.97% | 10.71% | 12.61% |
| Asian | 0.88% | 6.69% | 4.75% |
| American Indian | 0.45% | 0.51% | 0.95% |
| Other | 4.94% | 22.37% | 9.28% |
| Hispanic | 6.24% | 0.58% | 16.35% |
| Non-Hispanic | 93.76% | 99.42% | 83.65% |
| FAMILY | | | |
| Married, w/children | 25.80% | 43.48% | 30.42% |
| Married, no children | 41.75% | 30.03% | 42.46% |
| Single, w/children | 19.21% | 15.40% | 14.39% |
| Single, no children | 13.24% | 11.09% | 12.73% |
| Divorced | 13.40% | 8.74% | 10.62% |
| Separated | 5.89% | 4.97% | 4.97% |
| Widowed | 7.86% | 3.64% | 6.14% |
| Now Married | 42.92% | 48.66% | 46.32% |
| Never Married | 29.93% | 33.99% | 31.95% |
