| | Jefferson, NC | Millersburg, OH | United States |
| Population | 1,630 | 3,141 | 329,725,481 |
| Female Population | 54.1% | 53.1% | 50.5% |
| Male Population | 45.9% | 46.9% | 49.5% |
| Median Age | 50.1 | 36 | 38.4 |
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| Population - 2010 | 1,600 | 3,038 | 309,327,143 |
| Population - 2000 | 1,422 | 3,326 | 285,036,114 |
| Population - 1990 | 1,300 | 3,051 | 251,960,433 |
| Pop. 2000 to Now | 7.9% | -3.9% | 15.6% |
| Pop. 1990 to Now | 18.0% | 4.8% | 30.8% |
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| Population Density | 783.7 | 1,242.5 | 93.4 |
| Land Area | 2.1 | 2.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Jefferson, NC | Millersburg, OH | United States |
| Age 0 to 4 | 3.3% | 6.7% | 5.9% |
| Age 5 to 9 | 6.1% | 5.2% | 6.1% |
| Age 10 to 14 | 5.3% | 3.5% | 6.6% |
| Age 15 to 17 | 0.6% | 1.6% | 3.9% |
| Age 18 to 20 | 2.7% | 4.4% | 4.0% |
| Age 21 to 24 | 1.7% | 8.0% | 5.2% |
| Age 25 to 34 | 15.2% | 18.6% | 13.8% |
| Age 35 to 44 | 6.7% | 12.8% | 12.9% |
| Age 45 to 54 | 17.9% | 9.2% | 12.6% |
| Age 55 to 59 | 3.9% | 8.5% | 6.7% |
| Age 60 to 64 | 5.9% | 3.6% | 6.3% |
| Age 65 to 74 | 15.6% | 10.4% | 9.6% |
| Age 75 to 84 | 9.4% | 4.6% | 4.5% |
| Age 85 and over | 5.9% | 2.9% | 1.9% |
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| Race | | | |
| | Jefferson, NC | Millersburg, OH | United States |
| White | 85.3% | 95.9% | 59.4% |
| Black | 1.2% | 0.7% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.5% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 3.0% | 3.2% |
| Hispanic | 11.4% | 0.3% | 18.4% |
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| Marriage & Family | | | |
| | Jefferson, NC | Millersburg, OH | United States |
| Married Population | 46.0% | 48.7% | 49.8% |
| Currently Married | 41.8% | 45.7% | 48.0% |
| Married but Separated | 4.2% | 3.0% | 1.8% |
| Single Population | 54.0% | 51.3% | 50.2% |
| Never Married | 24.8% | 28.6% | 33.8% |
| Divorced | 17.3% | 14.4% | 10.8% |
| Widowed | 11.9% | 8.3% | 5.6% |
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| Household Size | 1.92 | 2.18 | 2.60 |
| Households | 752 | 1,399 | 124,010,992 |
| Family Households | 373 | 827 | 80,755,759 |
| Married couple, w/children | 6.2% | 25.2% | 30.5% |
| Married couple, no children | 56.0% | 43.5% | 42.9% |
| Non Family Households | 379 | 572 | 43,255,233 |
| Single householder, w/children | 31.9% | 19.5% | 15.8% |
| Single householder, no children | 5.9% | 11.9% | 10.8% |