| | Duncannon, PA | Emporia, VA | United States |
| Population | 1,271 | 5,761 | 329,725,481 |
| Female Population | 47.4% | 53.3% | 50.5% |
| Male Population | 52.6% | 46.7% | 49.5% |
| Median Age | 45.1 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,520 | 5,920 | 309,327,143 |
| Population - 2000 | 1,508 | 5,665 | 285,036,114 |
| Population - 1990 | 1,450 | 5,306 | 251,960,433 |
| Pop. 2000 to Now | -1.8% | -7.2% | 15.6% |
| Pop. 1990 to Now | 2.1% | -0.9% | 30.8% |
| space4 | | | |
| Population Density | 3,122.9 | 834.4 | 93.4 |
| Land Area | 0.4 | 6.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Duncannon, PA | Emporia, VA | United States |
| Age 0 to 4 | 6.2% | 6.1% | 5.9% |
| Age 5 to 9 | 4.7% | 8.7% | 6.1% |
| Age 10 to 14 | 4.0% | 8.2% | 6.6% |
| Age 15 to 17 | 1.3% | 5.7% | 3.9% |
| Age 18 to 20 | 1.9% | 1.8% | 4.0% |
| Age 21 to 24 | 4.3% | 3.0% | 5.2% |
| Age 25 to 34 | 13.0% | 11.5% | 13.8% |
| Age 35 to 44 | 14.1% | 13.0% | 12.9% |
| Age 45 to 54 | 17.9% | 13.5% | 12.6% |
| Age 55 to 59 | 6.7% | 5.8% | 6.7% |
| Age 60 to 64 | 6.7% | 6.1% | 6.3% |
| Age 65 to 74 | 13.8% | 9.3% | 9.6% |
| Age 75 to 84 | 2.4% | 5.2% | 4.5% |
| Age 85 and over | 2.9% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Duncannon, PA | Emporia, VA | United States |
| White | 85.8% | 19.5% | 59.4% |
| Black | 2.1% | 63.5% | 12.2% |
| Asian | 1.5% | 0.0% | 5.6% |
| Native American | 0.4% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 4.6% | 8.9% | 3.2% |
| Hispanic | 5.6% | 7.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Duncannon, PA | Emporia, VA | United States |
| Married Population | 46.3% | 35.5% | 49.8% |
| Currently Married | 44.0% | 31.8% | 48.0% |
| Married but Separated | 2.3% | 3.7% | 1.8% |
| Single Population | 53.7% | 64.5% | 50.2% |
| Never Married | 28.1% | 35.9% | 33.8% |
| Divorced | 17.1% | 17.9% | 10.8% |
| Widowed | 8.4% | 10.7% | 5.6% |
| space5 | | | |
| Household Size | 2.04 | 2.49 | 2.60 |
| Households | 623 | 2,240 | 124,010,992 |
| Family Households | 300 | 1,390 | 80,755,759 |
| Married couple, w/children | 26.7% | 16.9% | 30.5% |
| Married couple, no children | 48.3% | 29.6% | 42.9% |
| Non Family Households | 323 | 850 | 43,255,233 |
| Single householder, w/children | 12.0% | 34.9% | 15.8% |
| Single householder, no children | 13.0% | 18.6% | 10.8% |