| PEOPLE | Harlan | Ames | United States |
| Population | 5,106 | 58,965 | 308,035,306 |
| Pop. Density | 1,163 | 2,435 | 87 |
| Pop. Change | -2.21% | 16.36% | 8.07% |
| Median Age | 44 | 24.1 | 37.3 |
| Households | 2,222 | 22,759 | 116,716,292 |
| Household Size | 2.31 | 2.26 | 2.58 |
| Male Population | 46.36% | 52.99% | 49.27% |
| Female Population | 53.64% | 47.01% | 50.96% |
| Married Population | 59.76% | 31.43% | 47.02% |
| Single Population | 40.24% | 68.57% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.05% | 4.51% | 6.56% |
| Age 5 to 9 | 6.33% | 3.70% | 6.61% |
| Age 10 to 14 | 7.31% | 3.25% | 6.71% |
| Age 15 to 17 | 4.07% | 1.94% | 4.21% |
| Age 18 to 20 | 1.82% | 10.97% | 2.95% |
| Age 21 to 24 | 4.33% | 29.64% | 7.01% |
| Age 25 to 34 | 9.52% | 15.41% | 13.33% |
| Age 35 to 44 | 11.85% | 7.51% | 13.33% |
| Age 45 to 49 | 14.71% | 7.63% | 14.61% |
| Age 50 to 54 | 14.71% | 7.63% | 14.61% |
| Age 55 to 59 | 12.26% | 7.35% | 11.84% |
| Age 60 to 64 | 12.26% | 7.35% | 11.84% |
| Age 65 to 74 | 8.64% | 4.10% | 7.05% |
| Age 75 to 84 | 7.97% | 2.79% | 4.24% |
| Age 85 and over | 5.15% | 1.21% | 1.78% |
| RACE | | | |
| White | 97.02% | 84.52% | 72.41% |
| Black | 0.47% | 3.38% | 12.61% |
| Asian | 0.63% | 8.78% | 4.75% |
| American Indian | 0.35% | 0.17% | 0.95% |
| Other | 1.53% | 3.15% | 9.28% |
| Hispanic | 1.43% | 0.00% | 16.35% |
| Non-Hispanic | 98.57% | 100.00% | 83.65% |
| FAMILY | | | |
| Married, w/children | 28.11% | 32.22% | 30.42% |
| Married, no children | 51.16% | 49.22% | 42.46% |
| Single, w/children | 13.42% | 9.61% | 14.39% |
| Single, no children | 7.31% | 8.95% | 12.73% |
| Divorced | 8.27% | 5.01% | 10.62% |
| Separated | 2.18% | 2.78% | 4.97% |
| Widowed | 8.80% | 2.69% | 6.14% |
| Now Married | 60.63% | 31.66% | 46.32% |
| Never Married | 20.12% | 57.86% | 31.95% |
