| PEOPLE | Des Moines | Decatur | United States |
| Population | 203,433 | 76,122 | 308,035,306 |
| Pop. Density | 2,516 | 1,803 | 87 |
| Pop. Change | 2.51% | -7.95% | 8.07% |
| Median Age | 33.7 | 39 | 37.3 |
| Households | 81,369 | 32,344 | 116,716,292 |
| Household Size | 2.42 | 2.24 | 2.58 |
| Male Population | 48.93% | 46.82% | 49.27% |
| Female Population | 51.07% | 53.18% | 50.96% |
| Married Population | 44.98% | 43.75% | 47.02% |
| Single Population | 55.02% | 56.25% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.94% | 6.69% | 6.56% |
| Age 5 to 9 | 6.83% | 6.00% | 6.61% |
| Age 10 to 14 | 6.35% | 5.72% | 6.71% |
| Age 15 to 17 | 3.69% | 3.69% | 4.21% |
| Age 18 to 20 | 2.98% | 3.25% | 2.95% |
| Age 21 to 24 | 7.92% | 7.59% | 7.01% |
| Age 25 to 34 | 16.31% | 12.69% | 13.33% |
| Age 35 to 44 | 13.00% | 10.73% | 13.33% |
| Age 45 to 49 | 13.41% | 13.91% | 14.61% |
| Age 50 to 54 | 13.41% | 13.91% | 14.61% |
| Age 55 to 59 | 10.59% | 12.87% | 11.84% |
| Age 60 to 64 | 10.59% | 12.87% | 11.84% |
| Age 65 to 74 | 5.56% | 7.89% | 7.05% |
| Age 75 to 84 | 3.64% | 5.97% | 4.24% |
| Age 85 and over | 1.77% | 3.00% | 1.78% |
| RACE | | | |
| White | 76.42% | 71.61% | 72.41% |
| Black | 10.25% | 23.26% | 12.61% |
| Asian | 4.42% | 0.92% | 4.75% |
| American Indian | 0.50% | 0.23% | 0.95% |
| Other | 8.42% | 3.98% | 9.28% |
| Hispanic | 0.91% | 1.60% | 16.35% |
| Non-Hispanic | 99.09% | 98.40% | 83.65% |
| FAMILY | | | |
| Married, w/children | 28.63% | 18.92% | 30.42% |
| Married, no children | 37.93% | 44.75% | 42.46% |
| Single, w/children | 19.93% | 22.23% | 14.39% |
| Single, no children | 13.51% | 14.10% | 12.73% |
| Divorced | 13.51% | 12.71% | 10.62% |
| Separated | 4.88% | 3.85% | 4.97% |
| Widowed | 6.56% | 7.89% | 6.14% |
| Now Married | 44.49% | 44.53% | 46.32% |
| Never Married | 30.56% | 31.03% | 31.95% |
