| PEOPLE | Brookings | Ottumwa | United States |
| Population | 22,056 | 25,023 | 308,035,306 |
| Pop. Density | 1,705 | 1,578 | 87 |
| Pop. Change | 19.89% | -0.20% | 8.07% |
| Median Age | 23.9 | 37.3 | 37.3 |
| Households | 8,159 | 10,251 | 116,716,292 |
| Household Size | 2.31 | 2.36 | 2.58 |
| Male Population | 51.07% | 48.38% | 49.27% |
| Female Population | 48.93% | 51.62% | 50.96% |
| Married Population | 34.53% | 47.74% | 47.02% |
| Single Population | 65.47% | 52.26% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.23% | 7.22% | 6.56% |
| Age 5 to 9 | 4.72% | 6.42% | 6.61% |
| Age 10 to 14 | 3.97% | 5.90% | 6.71% |
| Age 15 to 17 | 2.14% | 3.80% | 4.21% |
| Age 18 to 20 | 11.59% | 3.53% | 2.95% |
| Age 21 to 24 | 26.51% | 7.28% | 7.01% |
| Age 25 to 34 | 14.01% | 13.15% | 13.33% |
| Age 35 to 44 | 8.25% | 11.71% | 13.33% |
| Age 45 to 49 | 8.32% | 13.40% | 14.61% |
| Age 50 to 54 | 8.32% | 13.40% | 14.61% |
| Age 55 to 59 | 6.91% | 11.59% | 11.84% |
| Age 60 to 64 | 6.91% | 11.59% | 11.84% |
| Age 65 to 74 | 3.89% | 7.06% | 7.05% |
| Age 75 to 84 | 2.77% | 5.87% | 4.24% |
| Age 85 and over | 1.70% | 3.07% | 1.78% |
| RACE | | | |
| White | 92.06% | 90.15% | 72.41% |
| Black | 1.06% | 1.87% | 12.61% |
| Asian | 3.72% | 0.85% | 4.75% |
| American Indian | 0.98% | 0.58% | 0.95% |
| Other | 2.17% | 6.55% | 9.28% |
| Hispanic | 0.69% | 1.78% | 16.35% |
| Non-Hispanic | 99.31% | 98.22% | 83.65% |
| FAMILY | | | |
| Married, w/children | 35.25% | 26.03% | 30.42% |
| Married, no children | 44.53% | 43.48% | 42.46% |
| Single, w/children | 12.02% | 18.15% | 14.39% |
| Single, no children | 8.21% | 12.34% | 12.73% |
| Divorced | 6.32% | 15.51% | 10.62% |
| Separated | 1.70% | 3.08% | 4.97% |
| Widowed | 4.61% | 8.21% | 6.14% |
| Now Married | 33.93% | 47.92% | 46.32% |
| Never Married | 53.45% | 25.29% | 31.95% |
