| PEOPLE | Belleville | Lompoc | United States |
| Population | 44,478 | 42,434 | 308,035,306 |
| Pop. Density | 1,956 | 3,659 | 87 |
| Pop. Change | 0.02% | 1.68% | 8.07% |
| Median Age | 36.5 | 34 | 37.3 |
| Households | 18,795 | 13,355 | 116,716,292 |
| Household Size | 2.3 | 2.9 | 2.58 |
| Male Population | 47.45% | 53.46% | 49.27% |
| Female Population | 52.55% | 46.54% | 50.96% |
| Married Population | 40.97% | 41.49% | 47.02% |
| Single Population | 59.03% | 58.51% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.75% | 7.60% | 6.56% |
| Age 5 to 9 | 6.23% | 6.90% | 6.61% |
| Age 10 to 14 | 6.28% | 7.22% | 6.71% |
| Age 15 to 17 | 4.06% | 4.65% | 4.21% |
| Age 18 to 20 | 2.53% | 3.12% | 2.95% |
| Age 21 to 24 | 6.73% | 7.37% | 7.01% |
| Age 25 to 34 | 15.47% | 14.52% | 13.33% |
| Age 35 to 44 | 13.05% | 14.31% | 13.33% |
| Age 45 to 49 | 15.02% | 14.75% | 14.61% |
| Age 50 to 54 | 15.02% | 14.75% | 14.61% |
| Age 55 to 59 | 10.94% | 9.61% | 11.84% |
| Age 60 to 64 | 10.94% | 9.61% | 11.84% |
| Age 65 to 74 | 5.87% | 5.31% | 7.05% |
| Age 75 to 84 | 4.79% | 3.40% | 4.24% |
| Age 85 and over | 2.28% | 1.24% | 1.78% |
| RACE | | | |
| White | 69.76% | 61.15% | 72.41% |
| Black | 25.44% | 5.73% | 12.61% |
| Asian | 0.98% | 3.81% | 4.75% |
| American Indian | 0.32% | 1.77% | 0.95% |
| Other | 3.50% | 27.54% | 9.28% |
| Hispanic | 8.53% | 10.90% | 16.35% |
| Non-Hispanic | 91.47% | 89.10% | 83.65% |
| FAMILY | | | |
| Married, w/children | 26.44% | 33.75% | 30.42% |
| Married, no children | 37.93% | 34.26% | 42.46% |
| Single, w/children | 20.58% | 17.96% | 14.39% |
| Single, no children | 15.04% | 14.03% | 12.73% |
| Divorced | 13.58% | 10.46% | 10.62% |
| Separated | 4.14% | 11.63% | 4.97% |
| Widowed | 9.17% | 5.33% | 6.14% |
| Now Married | 41.59% | 41.41% | 46.32% |
| Never Married | 31.52% | 31.18% | 31.95% |
