| | Amherst, VA | McKenney, VA | United States |
| Population | 2,504 | 506 | 329,725,481 |
| Female Population | 50.4% | 49.0% | 50.5% |
| Male Population | 49.6% | 51.0% | 49.5% |
| Median Age | 51 | 47.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,232 | 485 | 309,327,143 |
| Population - 2000 | 2,251 | 441 | 285,036,114 |
| Population - 1990 | 1,060 | 386 | 251,960,433 |
| Pop. 2000 to Now | -3.1% | 11.1% | 15.6% |
| Pop. 1990 to Now | 105.9% | 26.9% | 30.8% |
| space4 | | | |
| Population Density | 510.8 | 545.3 | 93.4 |
| Land Area | 4.9 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Amherst, VA | McKenney, VA | United States |
| Age 0 to 4 | 2.8% | 3.8% | 5.9% |
| Age 5 to 9 | 3.0% | 3.8% | 6.1% |
| Age 10 to 14 | 7.7% | 9.9% | 6.6% |
| Age 15 to 17 | 2.6% | 3.4% | 3.9% |
| Age 18 to 20 | 1.7% | 5.1% | 4.0% |
| Age 21 to 24 | 3.0% | 4.7% | 5.2% |
| Age 25 to 34 | 13.6% | 9.5% | 13.8% |
| Age 35 to 44 | 10.8% | 7.3% | 12.9% |
| Age 45 to 54 | 13.1% | 19.6% | 12.6% |
| Age 55 to 59 | 4.1% | 8.1% | 6.7% |
| Age 60 to 64 | 6.6% | 7.1% | 6.3% |
| Age 65 to 74 | 15.4% | 8.3% | 9.6% |
| Age 75 to 84 | 11.7% | 9.1% | 4.5% |
| Age 85 and over | 3.8% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Amherst, VA | McKenney, VA | United States |
| White | 70.4% | 64.0% | 59.4% |
| Black | 20.3% | 32.8% | 12.2% |
| Asian | 0.2% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 1.6% | 3.2% |
| Hispanic | 8.4% | 1.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Amherst, VA | McKenney, VA | United States |
| Married Population | 50.4% | 34.7% | 49.8% |
| Currently Married | 46.4% | 32.5% | 48.0% |
| Married but Separated | 4.1% | 2.2% | 1.8% |
| Single Population | 49.6% | 65.3% | 50.2% |
| Never Married | 23.3% | 34.9% | 33.8% |
| Divorced | 12.5% | 14.1% | 10.8% |
| Widowed | 13.8% | 16.3% | 5.6% |
| space5 | | | |
| Household Size | 2.05 | 2.59 | 2.60 |
| Households | 1,138 | 195 | 124,010,992 |
| Family Households | 637 | 108 | 80,755,759 |
| Married couple, w/children | 21.0% | 26.9% | 30.5% |
| Married couple, no children | 56.2% | 35.2% | 42.9% |
| Non Family Households | 501 | 87 | 43,255,233 |
| Single householder, w/children | 14.6% | 14.8% | 15.8% |
| Single householder, no children | 8.2% | 23.1% | 10.8% |