| | Fallon Station, NV | St. Charles, VA | United States |
| Population | 791 | 81 | 329,725,481 |
| Female Population | 31.4% | 40.7% | 50.5% |
| Male Population | 68.7% | 59.3% | 49.5% |
| Median Age | 18.5 | 50.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 772 | 122 | 309,327,143 |
| Population - 2000 | 1,265 | 159 | 285,036,114 |
| Population - 1990 | 1,092 | 206 | 251,960,433 |
| Pop. 2000 to Now | -44.4% | -31.5% | 15.6% |
| Pop. 1990 to Now | -35.6% | -47.1% | 30.8% |
| space4 | | | |
| Population Density | 277.4 | 457.6 | 93.4 |
| Land Area | 2.9 | 0.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fallon Station, NV | St. Charles, VA | United States |
| Age 0 to 4 | 34.8% | 0.0% | 5.9% |
| Age 5 to 9 | 1.8% | 1.2% | 6.1% |
| Age 10 to 14 | 6.4% | 4.9% | 6.6% |
| Age 15 to 17 | 0.0% | 4.9% | 3.9% |
| Age 18 to 20 | 13.5% | 0.0% | 4.0% |
| Age 21 to 24 | 13.0% | 2.5% | 5.2% |
| Age 25 to 34 | 11.8% | 8.6% | 13.8% |
| Age 35 to 44 | 18.7% | 11.1% | 12.9% |
| Age 45 to 54 | 0.0% | 30.9% | 12.6% |
| Age 55 to 59 | 0.0% | 1.2% | 6.7% |
| Age 60 to 64 | 0.0% | 6.2% | 6.3% |
| Age 65 to 74 | 0.0% | 23.5% | 9.6% |
| Age 75 to 84 | 0.0% | 1.2% | 4.5% |
| Age 85 and over | 0.0% | 3.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fallon Station, NV | St. Charles, VA | United States |
| White | 17.2% | 100.0% | 59.4% |
| Black | 12.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 3.2% | 0.0% | 3.2% |
| Hispanic | 67.1% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fallon Station, NV | St. Charles, VA | United States |
| Married Population | 66.7% | 44.7% | 49.8% |
| Currently Married | 66.7% | 44.7% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 33.3% | 55.3% | 50.2% |
| Never Married | 31.9% | 26.3% | 33.8% |
| Divorced | 1.3% | 17.1% | 10.8% |
| Widowed | 0.0% | 11.8% | 5.6% |
| space5 | | | |
| Household Size | 5.24 | 1.93 | 2.60 |
| Households | 138 | 42 | 124,010,992 |
| Family Households | 138 | 17 | 80,755,759 |
| Married couple, w/children | 77.5% | 29.4% | 30.5% |
| Married couple, no children | 15.2% | 52.9% | 42.9% |
| Non Family Households | 0 | 25 | 43,255,233 |
| Single householder, w/children | 7.2% | 11.8% | 15.8% |
| Single householder, no children | 0.0% | 5.9% | 10.8% |