| PEOPLE | Maryville | Peoria | United States |
| Population | 27,465 | 154,065 | 308,035,306 |
| Pop. Density | 1,635 | 883 | 87 |
| Pop. Change | 13.45% | 36.68% | 8.07% |
| Median Age | 38.9 | 37.9 | 37.3 |
| Households | 10,712 | 57,457 | 116,716,292 |
| Household Size | 2.39 | 2.66 | 2.58 |
| Male Population | 46.64% | 47.98% | 49.27% |
| Female Population | 53.36% | 52.02% | 50.96% |
| Married Population | 48.56% | 54.55% | 47.02% |
| Single Population | 51.44% | 45.45% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.26% | 6.38% | 6.56% |
| Age 5 to 9 | 6.82% | 7.12% | 6.61% |
| Age 10 to 14 | 7.57% | 7.82% | 6.71% |
| Age 15 to 17 | 4.57% | 4.70% | 4.21% |
| Age 18 to 20 | 3.31% | 2.71% | 2.95% |
| Age 21 to 24 | 6.79% | 5.71% | 7.01% |
| Age 25 to 34 | 10.38% | 11.58% | 13.33% |
| Age 35 to 44 | 13.80% | 14.11% | 13.33% |
| Age 45 to 49 | 13.80% | 14.47% | 14.61% |
| Age 50 to 54 | 13.80% | 14.47% | 14.61% |
| Age 55 to 59 | 10.63% | 11.10% | 11.84% |
| Age 60 to 64 | 10.63% | 11.10% | 11.84% |
| Age 65 to 74 | 7.56% | 7.37% | 7.05% |
| Age 75 to 84 | 5.98% | 4.60% | 4.24% |
| Age 85 and over | 3.52% | 2.34% | 1.78% |
| RACE | | | |
| White | 91.99% | 82.16% | 72.41% |
| Black | 3.23% | 3.36% | 12.61% |
| Asian | 1.53% | 3.23% | 4.75% |
| American Indian | 0.33% | 0.95% | 0.95% |
| Other | 2.91% | 10.29% | 9.28% |
| Hispanic | 5.11% | 8.53% | 16.35% |
| Non-Hispanic | 94.89% | 91.47% | 83.65% |
| FAMILY | | | |
| Married, w/children | 33.31% | 32.79% | 30.42% |
| Married, no children | 41.15% | 43.56% | 42.46% |
| Single, w/children | 15.52% | 13.71% | 14.39% |
| Single, no children | 10.02% | 9.95% | 12.73% |
| Divorced | 12.02% | 11.44% | 10.62% |
| Separated | 6.98% | 3.71% | 4.97% |
| Widowed | 9.27% | 6.13% | 6.14% |
| Now Married | 47.70% | 54.32% | 46.32% |
| Never Married | 24.03% | 24.40% | 31.95% |
