| | Nellysford, VA | Smithfield, VA | United States |
| Population | 1,337 | 8,513 | 329,725,481 |
| Female Population | 52.0% | 50.1% | 50.5% |
| Male Population | 48.0% | 49.9% | 49.5% |
| Median Age | 65.4 | 46.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 799 | 8,101 | 309,327,143 |
| Population - 2000 | 829 | 6,324 | 285,036,114 |
| Population - 1990 | 598 | 4,686 | 251,960,433 |
| Pop. 2000 to Now | 58.4% | 36.2% | 15.6% |
| Pop. 1990 to Now | 119.6% | 83.9% | 30.8% |
| space4 | | | |
| Population Density | 139.9 | 902.9 | 93.4 |
| Land Area | 9.6 | 9.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Nellysford, VA | Smithfield, VA | United States |
| Age 0 to 4 | 0.0% | 7.5% | 5.9% |
| Age 5 to 9 | 2.3% | 3.9% | 6.1% |
| Age 10 to 14 | 3.3% | 5.1% | 6.6% |
| Age 15 to 17 | 0.0% | 4.0% | 3.9% |
| Age 18 to 20 | 4.2% | 3.3% | 4.0% |
| Age 21 to 24 | 0.0% | 3.3% | 5.2% |
| Age 25 to 34 | 0.8% | 13.1% | 13.8% |
| Age 35 to 44 | 7.7% | 9.0% | 12.9% |
| Age 45 to 54 | 5.0% | 15.2% | 12.6% |
| Age 55 to 59 | 2.9% | 9.8% | 6.7% |
| Age 60 to 64 | 22.4% | 7.2% | 6.3% |
| Age 65 to 74 | 29.4% | 9.5% | 9.6% |
| Age 75 to 84 | 20.1% | 6.8% | 4.5% |
| Age 85 and over | 1.9% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Nellysford, VA | Smithfield, VA | United States |
| White | 96.5% | 71.2% | 59.4% |
| Black | 2.7% | 20.3% | 12.2% |
| Asian | 0.0% | 0.1% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 1.7% | 3.2% |
| Hispanic | 0.0% | 6.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Nellysford, VA | Smithfield, VA | United States |
| Married Population | 78.6% | 58.6% | 49.8% |
| Currently Married | 78.6% | 56.7% | 48.0% |
| Married but Separated | 0.0% | 1.9% | 1.8% |
| Single Population | 21.4% | 41.4% | 50.2% |
| Never Married | 6.9% | 25.0% | 33.8% |
| Divorced | 5.8% | 9.8% | 10.8% |
| Widowed | 8.7% | 6.7% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 2.49 | 2.60 |
| Households | 662 | 3,394 | 124,010,992 |
| Family Households | 507 | 2,344 | 80,755,759 |
| Married couple, w/children | 10.7% | 28.0% | 30.5% |
| Married couple, no children | 86.2% | 52.5% | 42.9% |
| Non Family Households | 155 | 1,050 | 43,255,233 |
| Single householder, w/children | 0.0% | 11.0% | 15.8% |
| Single householder, no children | 3.2% | 8.4% | 10.8% |