| PEOPLE | Waterloo | Phoenix | United States |
| Population | 68,406 | 1,445,632 | 308,035,306 |
| Pop. Density | 1,114 | 2,798 | 87 |
| Pop. Change | -0.14% | 5.11% | 8.07% |
| Median Age | 35.9 | 32.2 | 37.3 |
| Households | 28,607 | 514,806 | 116,716,292 |
| Household Size | 2.35 | 2.78 | 2.58 |
| Male Population | 48.44% | 50.15% | 49.27% |
| Female Population | 51.56% | 49.85% | 50.96% |
| Married Population | 47.08% | 38.49% | 47.02% |
| Single Population | 52.92% | 61.51% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.47% | 8.29% | 6.56% |
| Age 5 to 9 | 6.48% | 7.83% | 6.61% |
| Age 10 to 14 | 6.08% | 7.52% | 6.71% |
| Age 15 to 17 | 3.68% | 4.60% | 4.21% |
| Age 18 to 20 | 2.72% | 3.04% | 2.95% |
| Age 21 to 24 | 7.60% | 7.38% | 7.01% |
| Age 25 to 34 | 14.92% | 15.50% | 13.33% |
| Age 35 to 44 | 11.54% | 14.28% | 13.33% |
| Age 45 to 49 | 13.24% | 13.50% | 14.61% |
| Age 50 to 54 | 13.24% | 13.50% | 14.61% |
| Age 55 to 59 | 12.28% | 9.62% | 11.84% |
| Age 60 to 64 | 12.28% | 9.62% | 11.84% |
| Age 65 to 74 | 6.87% | 4.87% | 7.05% |
| Age 75 to 84 | 4.80% | 2.56% | 4.24% |
| Age 85 and over | 2.34% | 1.00% | 1.78% |
| RACE | | | |
| White | 77.28% | 65.85% | 72.41% |
| Black | 15.50% | 6.48% | 12.61% |
| Asian | 1.06% | 3.15% | 4.75% |
| American Indian | 0.29% | 2.24% | 0.95% |
| Other | 5.87% | 22.28% | 9.28% |
| Hispanic | 1.84% | 2.90% | 16.35% |
| Non-Hispanic | 98.16% | 97.10% | 83.65% |
| FAMILY | | | |
| Married, w/children | 23.90% | 32.41% | 30.42% |
| Married, no children | 42.94% | 33.47% | 42.46% |
| Single, w/children | 20.08% | 19.84% | 14.39% |
| Single, no children | 13.07% | 14.28% | 12.73% |
| Divorced | 11.18% | 13.39% | 10.62% |
| Separated | 3.94% | 7.27% | 4.97% |
| Widowed | 7.09% | 4.82% | 6.14% |
| Now Married | 47.34% | 38.44% | 46.32% |
| Never Married | 30.45% | 36.08% | 31.95% |
