| | Vass, NC | Port Byron, IL | United States |
| Population | 1,087 | 1,999 | 329,725,481 |
| Female Population | 48.1% | 48.9% | 50.5% |
| Male Population | 51.9% | 51.1% | 49.5% |
| Median Age | 30 | 40.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 706 | 1,645 | 309,327,143 |
| Population - 2000 | 750 | 1,535 | 285,036,114 |
| Population - 1990 | 670 | 1,002 | 251,960,433 |
| Pop. 2000 to Now | 6.8% | 4.0% | 15.6% |
| Pop. 1990 to Now | 19.6% | 59.4% | 30.8% |
| space4 | | | |
| Population Density | 338.3 | 806.7 | 93.4 |
| Land Area | 3.2 | 2.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Vass, NC | Port Byron, IL | United States |
| Age 0 to 4 | 13.2% | 5.7% | 5.9% |
| Age 5 to 9 | 4.9% | 7.4% | 6.1% |
| Age 10 to 14 | 20.2% | 9.3% | 6.6% |
| Age 15 to 17 | 5.6% | 4.6% | 3.9% |
| Age 18 to 20 | 2.2% | 1.9% | 4.0% |
| Age 21 to 24 | 2.1% | 3.8% | 5.2% |
| Age 25 to 34 | 9.0% | 11.4% | 13.8% |
| Age 35 to 44 | 18.1% | 11.1% | 12.9% |
| Age 45 to 54 | 7.1% | 12.7% | 12.6% |
| Age 55 to 59 | 2.9% | 7.1% | 6.7% |
| Age 60 to 64 | 5.0% | 11.5% | 6.3% |
| Age 65 to 74 | 4.8% | 9.5% | 9.6% |
| Age 75 to 84 | 3.6% | 2.9% | 4.5% |
| Age 85 and over | 1.3% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Vass, NC | Port Byron, IL | United States |
| White | 48.5% | 94.7% | 59.4% |
| Black | 26.5% | 1.4% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 21.0% | 0.8% | 3.2% |
| Hispanic | 3.5% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Vass, NC | Port Byron, IL | United States |
| Married Population | 58.4% | 63.1% | 49.8% |
| Currently Married | 57.3% | 62.0% | 48.0% |
| Married but Separated | 1.0% | 1.1% | 1.8% |
| Single Population | 41.6% | 36.9% | 50.2% |
| Never Married | 30.4% | 20.7% | 33.8% |
| Divorced | 6.7% | 11.5% | 10.8% |
| Widowed | 4.5% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 3.25 | 2.54 | 2.60 |
| Households | 334 | 788 | 124,010,992 |
| Family Households | 226 | 551 | 80,755,759 |
| Married couple, w/children | 36.3% | 34.8% | 30.5% |
| Married couple, no children | 31.9% | 48.5% | 42.9% |
| Non Family Households | 108 | 237 | 43,255,233 |
| Single householder, w/children | 25.7% | 10.7% | 15.8% |
| Single householder, no children | 6.2% | 6.0% | 10.8% |