| PEOPLE | Springfield | Clearlake | United States |
| Population | 159,498 | 15,250 | 308,035,306 |
| Pop. Density | 1,952 | 1,506 | 87 |
| Pop. Change | 3.96% | 19.31% | 8.07% |
| Median Age | 33.4 | 39.8 | 37.3 |
| Households | 69,754 | 5,970 | 116,716,292 |
| Household Size | 2.16 | 2.47 | 2.58 |
| Male Population | 48.48% | 49.98% | 49.27% |
| Female Population | 51.52% | 50.02% | 50.96% |
| Married Population | 40.21% | 33.59% | 47.02% |
| Single Population | 59.79% | 66.41% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.01% | 7.07% | 6.56% |
| Age 5 to 9 | 4.94% | 6.26% | 6.61% |
| Age 10 to 14 | 4.46% | 6.39% | 6.71% |
| Age 15 to 17 | 2.89% | 4.26% | 4.21% |
| Age 18 to 20 | 4.60% | 3.04% | 2.95% |
| Age 21 to 24 | 13.83% | 6.98% | 7.01% |
| Age 25 to 34 | 15.31% | 10.87% | 13.33% |
| Age 35 to 44 | 10.73% | 11.32% | 13.33% |
| Age 45 to 49 | 12.25% | 15.28% | 14.61% |
| Age 50 to 54 | 12.25% | 15.28% | 14.61% |
| Age 55 to 59 | 10.49% | 13.50% | 11.84% |
| Age 60 to 64 | 10.49% | 13.50% | 11.84% |
| Age 65 to 74 | 6.76% | 8.36% | 7.05% |
| Age 75 to 84 | 5.10% | 4.75% | 4.24% |
| Age 85 and over | 2.64% | 1.93% | 1.78% |
| RACE | | | |
| White | 88.73% | 73.85% | 72.41% |
| Black | 4.09% | 4.03% | 12.61% |
| Asian | 1.89% | 1.06% | 4.75% |
| American Indian | 0.77% | 2.62% | 0.95% |
| Other | 4.51% | 18.45% | 9.28% |
| Hispanic | 7.88% | 31.41% | 16.35% |
| Non-Hispanic | 92.12% | 68.59% | 83.65% |
| FAMILY | | | |
| Married, w/children | 22.97% | 22.06% | 30.42% |
| Married, no children | 44.63% | 35.20% | 42.46% |
| Single, w/children | 17.87% | 24.20% | 14.39% |
| Single, no children | 14.53% | 18.55% | 12.73% |
| Divorced | 14.29% | 18.95% | 10.62% |
| Separated | 3.70% | 7.04% | 4.97% |
| Widowed | 6.66% | 9.67% | 6.14% |
| Now Married | 40.31% | 33.49% | 46.32% |
| Never Married | 35.04% | 30.85% | 31.95% |
