| | Chatham, VA | Blacksburg, VA | United States |
| Population | 1,558 | 44,385 | 329,725,481 |
| Female Population | 46.8% | 45.5% | 50.5% |
| Male Population | 53.2% | 54.5% | 49.5% |
| Median Age | 35.6 | 21.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,477 | 42,580 | 309,327,143 |
| Population - 2000 | 1,338 | 39,573 | 285,036,114 |
| Population - 1990 | 1,354 | 34,590 | 251,960,433 |
| Pop. 2000 to Now | 5.6% | 11.4% | 15.6% |
| Pop. 1990 to Now | 4.4% | 27.4% | 30.8% |
| space4 | | | |
| Population Density | 767.9 | 2,250.4 | 93.4 |
| Land Area | 2.0 | 19.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Chatham, VA | Blacksburg, VA | United States |
| Age 0 to 4 | 8.7% | 3.1% | 5.9% |
| Age 5 to 9 | 6.8% | 2.4% | 6.1% |
| Age 10 to 14 | 3.4% | 2.7% | 6.6% |
| Age 15 to 17 | 4.4% | 1.9% | 3.9% |
| Age 18 to 20 | 2.8% | 30.2% | 4.0% |
| Age 21 to 24 | 2.3% | 24.2% | 5.2% |
| Age 25 to 34 | 19.8% | 11.1% | 13.8% |
| Age 35 to 44 | 11.7% | 6.9% | 12.9% |
| Age 45 to 54 | 11.7% | 5.1% | 12.6% |
| Age 55 to 59 | 4.8% | 2.3% | 6.7% |
| Age 60 to 64 | 5.2% | 2.5% | 6.3% |
| Age 65 to 74 | 9.1% | 4.7% | 9.6% |
| Age 75 to 84 | 6.5% | 2.1% | 4.5% |
| Age 85 and over | 2.8% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Chatham, VA | Blacksburg, VA | United States |
| White | 74.5% | 76.4% | 59.4% |
| Black | 17.4% | 4.8% | 12.2% |
| Asian | 0.4% | 11.9% | 5.6% |
| Native American | 0.0% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 1.5% | 0.3% | 0.4% |
| Two or More Races | 5.4% | 1.9% | 3.2% |
| Hispanic | 0.8% | 3.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Chatham, VA | Blacksburg, VA | United States |
| Married Population | 54.2% | 21.1% | 49.8% |
| Currently Married | 51.3% | 20.6% | 48.0% |
| Married but Separated | 2.9% | 0.5% | 1.8% |
| Single Population | 45.8% | 78.9% | 50.2% |
| Never Married | 26.4% | 73.4% | 33.8% |
| Divorced | 11.2% | 3.4% | 10.8% |
| Widowed | 8.2% | 2.1% | 5.6% |
| space5 | | | |
| Household Size | 2.62 | 2.77 | 2.60 |
| Households | 532 | 12,708 | 124,010,992 |
| Family Households | 339 | 4,492 | 80,755,759 |
| Married couple, w/children | 41.6% | 41.7% | 30.5% |
| Married couple, no children | 33.3% | 41.7% | 42.9% |
| Non Family Households | 193 | 8,216 | 43,255,233 |
| Single householder, w/children | 15.9% | 9.2% | 15.8% |
| Single householder, no children | 9.1% | 7.5% | 10.8% |