| PEOPLE | Hartland | Watertown | United States |
| Population | 3,393 | 27,023 | 308,035,306 |
| Pop. Density | 76 | 2,996 | 87 |
| Pop. Change | 5.27% | 0.74% | 8.07% |
| Median Age | 45.5 | 32.4 | 37.3 |
| Households | 1,417 | 11,409 | 116,716,292 |
| Household Size | 2.39 | 2.29 | 2.58 |
| Male Population | 50.69% | 47.83% | 49.27% |
| Female Population | 49.31% | 52.17% | 50.96% |
| Married Population | 58.61% | 44.91% | 47.02% |
| Single Population | 41.39% | 55.09% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.36% | 8.97% | 6.56% |
| Age 5 to 9 | 5.92% | 6.47% | 6.61% |
| Age 10 to 14 | 5.75% | 5.51% | 6.71% |
| Age 15 to 17 | 4.33% | 3.49% | 4.21% |
| Age 18 to 20 | 2.06% | 2.63% | 2.95% |
| Age 21 to 24 | 4.07% | 9.44% | 7.01% |
| Age 25 to 34 | 8.55% | 17.20% | 13.33% |
| Age 35 to 44 | 14.03% | 11.72% | 13.33% |
| Age 45 to 49 | 20.25% | 12.05% | 14.61% |
| Age 50 to 54 | 20.25% | 12.05% | 14.61% |
| Age 55 to 59 | 16.42% | 9.34% | 11.84% |
| Age 60 to 64 | 16.42% | 9.34% | 11.84% |
| Age 65 to 74 | 8.75% | 5.68% | 7.05% |
| Age 75 to 84 | 4.01% | 4.70% | 4.24% |
| Age 85 and over | 1.50% | 2.81% | 1.78% |
| RACE | | | |
| White | 97.76% | 86.25% | 72.41% |
| Black | 0.21% | 6.04% | 12.61% |
| Asian | 0.41% | 1.83% | 4.75% |
| American Indian | 0.03% | 0.58% | 0.95% |
| Other | 1.59% | 5.30% | 9.28% |
| Hispanic | 4.21% | 0.00% | 16.35% |
| Non-Hispanic | 95.79% | 100.00% | 83.65% |
| FAMILY | | | |
| Married, w/children | 30.67% | 27.78% | 30.42% |
| Married, no children | 54.15% | 36.39% | 42.46% |
| Single, w/children | 7.59% | 23.53% | 14.39% |
| Single, no children | 7.59% | 12.29% | 12.73% |
| Divorced | 16.07% | 11.06% | 10.62% |
| Separated | 1.35% | 9.87% | 4.97% |
| Widowed | 4.13% | 7.01% | 6.14% |
| Now Married | 58.07% | 45.81% | 46.32% |
| Never Married | 20.39% | 26.25% | 31.95% |
