| PEOPLE | Janesville | Miami | United States |
| Population | 63,575 | 399,457 | 308,035,306 |
| Pop. Density | 1,878 | 11,136 | 87 |
| Pop. Change | 2.90% | 11.39% | 8.07% |
| Median Age | 37.1 | 38.8 | 37.3 |
| Households | 25,828 | 158,317 | 116,716,292 |
| Household Size | 2.42 | 2.46 | 2.58 |
| Male Population | 48.92% | 49.80% | 49.27% |
| Female Population | 51.08% | 50.20% | 50.96% |
| Married Population | 49.34% | 31.50% | 47.02% |
| Single Population | 50.66% | 68.50% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.69% | 5.98% | 6.56% |
| Age 5 to 9 | 6.85% | 4.77% | 6.61% |
| Age 10 to 14 | 6.93% | 4.60% | 6.71% |
| Age 15 to 17 | 4.28% | 3.04% | 4.21% |
| Age 18 to 20 | 2.40% | 2.24% | 2.95% |
| Age 21 to 24 | 5.99% | 7.17% | 7.01% |
| Age 25 to 34 | 14.05% | 16.48% | 13.33% |
| Age 35 to 44 | 13.81% | 14.89% | 13.33% |
| Age 45 to 49 | 14.22% | 14.04% | 14.61% |
| Age 50 to 54 | 14.22% | 14.04% | 14.61% |
| Age 55 to 59 | 10.89% | 10.79% | 11.84% |
| Age 60 to 64 | 10.89% | 10.79% | 11.84% |
| Age 65 to 74 | 7.18% | 8.03% | 7.05% |
| Age 75 to 84 | 4.84% | 5.69% | 4.24% |
| Age 85 and over | 1.87% | 2.29% | 1.78% |
| RACE | | | |
| White | 91.70% | 72.58% | 72.41% |
| Black | 2.57% | 19.25% | 12.61% |
| Asian | 1.35% | 0.99% | 4.75% |
| American Indian | 0.29% | 0.30% | 0.95% |
| Other | 4.09% | 6.89% | 9.28% |
| Hispanic | 0.56% | 7.50% | 16.35% |
| Non-Hispanic | 99.44% | 92.50% | 83.65% |
| FAMILY | | | |
| Married, w/children | 28.56% | 20.56% | 30.42% |
| Married, no children | 43.41% | 34.54% | 42.46% |
| Single, w/children | 18.33% | 19.31% | 14.39% |
| Single, no children | 9.70% | 25.58% | 12.73% |
| Divorced | 14.28% | 13.14% | 10.62% |
| Separated | 2.08% | 10.72% | 4.97% |
| Widowed | 5.80% | 8.45% | 6.14% |
| Now Married | 49.72% | 31.69% | 46.32% |
| Never Married | 28.12% | 36.01% | 31.95% |
