| | Hillsboro, VA | Granite Bay, CA | United States |
| Population | 174 | 21,673 | 329,725,481 |
| Female Population | 48.3% | 50.5% | 50.5% |
| Male Population | 51.7% | 49.5% | 49.5% |
| Median Age | 57 | 48.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 140 | 22,681 | 309,327,143 |
| Population - 2000 | 96 | 19,388 | 285,036,114 |
| Population - 1990 | 72 | 12,884 | 251,960,433 |
| Pop. 2000 to Now | 76.0% | 25.3% | 15.6% |
| Pop. 1990 to Now | 134.7% | 88.5% | 30.8% |
| space4 | | | |
| Population Density | 656.6 | 1,007.0 | 93.4 |
| Land Area | 0.3 | 21.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hillsboro, VA | Granite Bay, CA | United States |
| Age 0 to 4 | 2.3% | 3.2% | 5.9% |
| Age 5 to 9 | 2.3% | 7.0% | 6.1% |
| Age 10 to 14 | 4.0% | 6.7% | 6.6% |
| Age 15 to 17 | 4.0% | 5.8% | 3.9% |
| Age 18 to 20 | 3.4% | 3.1% | 4.0% |
| Age 21 to 24 | 0.0% | 3.4% | 5.2% |
| Age 25 to 34 | 7.5% | 5.8% | 13.8% |
| Age 35 to 44 | 8.0% | 11.0% | 12.9% |
| Age 45 to 54 | 17.8% | 15.4% | 12.6% |
| Age 55 to 59 | 6.3% | 10.0% | 6.7% |
| Age 60 to 64 | 4.0% | 8.1% | 6.3% |
| Age 65 to 74 | 33.3% | 12.3% | 9.6% |
| Age 75 to 84 | 6.9% | 5.8% | 4.5% |
| Age 85 and over | 0.0% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hillsboro, VA | Granite Bay, CA | United States |
| White | 100.0% | 74.7% | 59.4% |
| Black | 0.0% | 3.4% | 12.2% |
| Asian | 0.0% | 8.7% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.0% | 4.1% | 3.2% |
| Hispanic | 0.0% | 8.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hillsboro, VA | Granite Bay, CA | United States |
| Married Population | 71.7% | 67.7% | 49.8% |
| Currently Married | 71.7% | 67.1% | 48.0% |
| Married but Separated | 0.0% | 0.6% | 1.8% |
| Single Population | 28.3% | 32.3% | 50.2% |
| Never Married | 23.3% | 21.7% | 33.8% |
| Divorced | 3.8% | 5.6% | 10.8% |
| Widowed | 1.3% | 5.1% | 5.6% |
| space5 | | | |
| Household Size | 2.90 | 2.79 | 2.60 |
| Households | 60 | 7,725 | 124,010,992 |
| Family Households | 53 | 6,340 | 80,755,759 |
| Married couple, w/children | 20.8% | 38.5% | 30.5% |
| Married couple, no children | 77.4% | 52.7% | 42.9% |
| Non Family Households | 7 | 1,385 | 43,255,233 |
| Single householder, w/children | 0.0% | 3.6% | 15.8% |
| Single householder, no children | 1.9% | 5.1% | 10.8% |