| | Emporia, VA | Murphy, TX | United States |
| Population | 5,761 | 20,655 | 329,725,481 |
| Female Population | 53.3% | 49.8% | 50.5% |
| Male Population | 46.7% | 50.2% | 49.5% |
| Median Age | 39.2 | 39.6 | 38.4 |
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| Population - 2010 | 5,920 | 18,067 | 309,327,143 |
| Population - 2000 | 5,665 | 3,099 | 285,036,114 |
| Population - 1990 | 5,306 | 1,547 | 251,960,433 |
| Pop. 2000 to Now | -7.2% | 572.6% | 15.6% |
| Pop. 1990 to Now | -0.9% | 1,247.4% | 30.8% |
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| Population Density | 834.4 | 3,634.5 | 93.4 |
| Land Area | 6.9 | 5.7 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Emporia, VA | Murphy, TX | United States |
| Age 0 to 4 | 6.1% | 4.2% | 5.9% |
| Age 5 to 9 | 8.7% | 8.2% | 6.1% |
| Age 10 to 14 | 8.2% | 11.5% | 6.6% |
| Age 15 to 17 | 5.7% | 7.3% | 3.9% |
| Age 18 to 20 | 1.8% | 4.4% | 4.0% |
| Age 21 to 24 | 3.0% | 3.7% | 5.2% |
| Age 25 to 34 | 11.5% | 5.8% | 13.8% |
| Age 35 to 44 | 13.0% | 14.2% | 12.9% |
| Age 45 to 54 | 13.5% | 21.0% | 12.6% |
| Age 55 to 59 | 5.8% | 4.8% | 6.7% |
| Age 60 to 64 | 6.1% | 5.4% | 6.3% |
| Age 65 to 74 | 9.3% | 6.4% | 9.6% |
| Age 75 to 84 | 5.2% | 3.0% | 4.5% |
| Age 85 and over | 2.2% | 0.1% | 1.9% |
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| Race | | | |
| | Emporia, VA | Murphy, TX | United States |
| White | 19.5% | 51.5% | 59.4% |
| Black | 63.5% | 11.6% | 12.2% |
| Asian | 0.0% | 28.5% | 5.6% |
| Native American | 0.1% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 8.9% | 2.3% | 3.2% |
| Hispanic | 7.9% | 5.6% | 18.4% |
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| Marriage & Family | | | |
| | Emporia, VA | Murphy, TX | United States |
| Married Population | 35.5% | 64.6% | 49.8% |
| Currently Married | 31.8% | 64.1% | 48.0% |
| Married but Separated | 3.7% | 0.6% | 1.8% |
| Single Population | 64.5% | 35.4% | 50.2% |
| Never Married | 35.9% | 27.0% | 33.8% |
| Divorced | 17.9% | 5.1% | 10.8% |
| Widowed | 10.7% | 3.2% | 5.6% |
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| Household Size | 2.49 | 3.60 | 2.60 |
| Households | 2,240 | 5,731 | 124,010,992 |
| Family Households | 1,390 | 5,226 | 80,755,759 |
| Married couple, w/children | 16.9% | 58.0% | 30.5% |
| Married couple, no children | 29.6% | 31.7% | 42.9% |
| Non Family Households | 850 | 505 | 43,255,233 |
| Single householder, w/children | 34.9% | 4.4% | 15.8% |
| Single householder, no children | 18.6% | 5.9% | 10.8% |