| | Fair Lakes, VA | Oakton, VA | United States |
| Population | 8,689 | 36,675 | 329,725,481 |
| Female Population | 48.6% | 49.7% | 50.5% |
| Male Population | 51.4% | 50.3% | 49.5% |
| Median Age | 37.9 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,960 | 33,518 | 309,327,143 |
| Population - 2000 | 4,396 | 29,348 | 285,036,114 |
| Population - 1990 | 1,150 | 24,610 | 251,960,433 |
| Pop. 2000 to Now | 85.1% | 27.7% | 15.6% |
| Pop. 1990 to Now | 607.4% | 52.3% | 30.8% |
| space4 | | | |
| Population Density | 3,669.3 | 3,756.2 | 93.4 |
| Land Area | 2.4 | 9.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fair Lakes, VA | Oakton, VA | United States |
| Age 0 to 4 | 2.8% | 6.1% | 5.9% |
| Age 5 to 9 | 5.4% | 6.0% | 6.1% |
| Age 10 to 14 | 6.3% | 6.8% | 6.6% |
| Age 15 to 17 | 3.4% | 4.6% | 3.9% |
| Age 18 to 20 | 2.8% | 3.1% | 4.0% |
| Age 21 to 24 | 5.5% | 5.1% | 5.2% |
| Age 25 to 34 | 18.7% | 12.7% | 13.8% |
| Age 35 to 44 | 15.0% | 15.1% | 12.9% |
| Age 45 to 54 | 15.3% | 15.0% | 12.6% |
| Age 55 to 59 | 6.8% | 5.4% | 6.7% |
| Age 60 to 64 | 5.9% | 5.3% | 6.3% |
| Age 65 to 74 | 7.3% | 8.8% | 9.6% |
| Age 75 to 84 | 4.0% | 4.2% | 4.5% |
| Age 85 and over | 0.9% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fair Lakes, VA | Oakton, VA | United States |
| White | 45.2% | 53.0% | 59.4% |
| Black | 5.6% | 5.1% | 12.2% |
| Asian | 37.8% | 22.4% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 2.7% | 0.8% | 0.4% |
| Two or More Races | 4.8% | 4.8% | 3.2% |
| Hispanic | 3.8% | 13.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fair Lakes, VA | Oakton, VA | United States |
| Married Population | 61.2% | 57.7% | 49.8% |
| Currently Married | 59.8% | 56.1% | 48.0% |
| Married but Separated | 1.4% | 1.6% | 1.8% |
| Single Population | 38.8% | 42.3% | 50.2% |
| Never Married | 28.1% | 31.0% | 33.8% |
| Divorced | 8.0% | 7.3% | 10.8% |
| Widowed | 2.7% | 4.0% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 2.61 | 2.60 |
| Households | 3,552 | 14,031 | 124,010,992 |
| Family Households | 2,308 | 9,069 | 80,755,759 |
| Married couple, w/children | 34.7% | 41.7% | 30.5% |
| Married couple, no children | 52.3% | 42.3% | 42.9% |
| Non Family Households | 1,244 | 4,962 | 43,255,233 |
| Single householder, w/children | 7.7% | 8.9% | 15.8% |
| Single householder, no children | 5.3% | 7.1% | 10.8% |