| PEOPLE | Overfield township | Monticello | United States |
| Population | 1,666 | 2,506 | 308,035,306 |
| Pop. Density | 168 | 632 | 87 |
| Pop. Change | 8.96% | 5.18% | 8.07% |
| Median Age | 46.3 | 42.4 | 37.3 |
| Households | 704 | 1,027 | 116,716,292 |
| Household Size | 2.37 | 2.32 | 2.58 |
| Male Population | 49.28% | 46.13% | 49.27% |
| Female Population | 50.72% | 53.87% | 50.96% |
| Married Population | 55.66% | 31.95% | 47.02% |
| Single Population | 44.34% | 68.05% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.92% | 7.26% | 6.56% |
| Age 5 to 9 | 3.90% | 6.19% | 6.61% |
| Age 10 to 14 | 5.58% | 6.03% | 6.71% |
| Age 15 to 17 | 4.68% | 3.75% | 4.21% |
| Age 18 to 20 | 2.64% | 2.63% | 2.95% |
| Age 21 to 24 | 4.86% | 5.99% | 7.01% |
| Age 25 to 34 | 9.60% | 11.21% | 13.33% |
| Age 35 to 44 | 11.76% | 9.26% | 13.33% |
| Age 45 to 49 | 16.87% | 13.89% | 14.61% |
| Age 50 to 54 | 16.87% | 13.89% | 14.61% |
| Age 55 to 59 | 17.05% | 14.53% | 11.84% |
| Age 60 to 64 | 17.05% | 14.53% | 11.84% |
| Age 65 to 74 | 9.90% | 10.14% | 7.05% |
| Age 75 to 84 | 5.46% | 5.47% | 4.24% |
| Age 85 and over | 2.76% | 3.67% | 1.78% |
| RACE | | | |
| White | 98.08% | 43.06% | 72.41% |
| Black | 0.60% | 54.23% | 12.61% |
| Asian | 0.12% | 0.68% | 4.75% |
| American Indian | 0.18% | 0.00% | 0.95% |
| Other | 1.02% | 2.04% | 9.28% |
| Hispanic | 23.41% | 7.61% | 16.35% |
| Non-Hispanic | 76.59% | 92.39% | 83.65% |
| FAMILY | | | |
| Married, w/children | 28.76% | 15.85% | 30.42% |
| Married, no children | 48.50% | 38.77% | 42.46% |
| Single, w/children | 8.58% | 21.38% | 14.39% |
| Single, no children | 14.16% | 24.00% | 12.73% |
| Divorced | 8.62% | 14.04% | 10.62% |
| Separated | 2.21% | 6.41% | 4.97% |
| Widowed | 7.02% | 9.06% | 6.14% |
| Now Married | 55.30% | 31.76% | 46.32% |
| Never Married | 26.85% | 38.73% | 31.95% |
