| | Duck, NC | Jefferson, NC | United States |
| Population | 581 | 1,630 | 329,725,481 |
| Female Population | 48.0% | 54.1% | 50.5% |
| Male Population | 52.0% | 45.9% | 49.5% |
| Median Age | 58.1 | 50.1 | 38.4 |
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| Population - 2010 | 373 | 1,600 | 309,327,143 |
| Population - 2000 | 416 | 1,422 | 285,036,114 |
| Population - 1990 | 360 | 1,300 | 251,960,433 |
| Pop. 2000 to Now | -5.3% | 7.9% | 15.6% |
| Pop. 1990 to Now | 9.4% | 18.0% | 30.8% |
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| Population Density | 240.5 | 783.7 | 93.4 |
| Land Area | 2.4 | 2.1 | 3,531,905.4 |
| Water Area | 1.3 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Duck, NC | Jefferson, NC | United States |
| Age 0 to 4 | 3.4% | 3.3% | 5.9% |
| Age 5 to 9 | 5.2% | 6.1% | 6.1% |
| Age 10 to 14 | 3.1% | 5.3% | 6.6% |
| Age 15 to 17 | 1.7% | 0.6% | 3.9% |
| Age 18 to 20 | 3.6% | 2.7% | 4.0% |
| Age 21 to 24 | 4.1% | 1.7% | 5.2% |
| Age 25 to 34 | 2.8% | 15.2% | 13.8% |
| Age 35 to 44 | 7.1% | 6.7% | 12.9% |
| Age 45 to 54 | 14.5% | 17.9% | 12.6% |
| Age 55 to 59 | 9.5% | 3.9% | 6.7% |
| Age 60 to 64 | 9.8% | 5.9% | 6.3% |
| Age 65 to 74 | 18.6% | 15.6% | 9.6% |
| Age 75 to 84 | 14.6% | 9.4% | 4.5% |
| Age 85 and over | 2.1% | 5.9% | 1.9% |
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| Race | | | |
| | Duck, NC | Jefferson, NC | United States |
| White | 97.1% | 85.3% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.9% | 0.0% | 5.6% |
| Native American | 0.0% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 1.7% | 3.2% |
| Hispanic | 1.5% | 11.4% | 18.4% |
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| Marriage & Family | | | |
| | Duck, NC | Jefferson, NC | United States |
| Married Population | 72.3% | 46.0% | 49.8% |
| Currently Married | 70.4% | 41.8% | 48.0% |
| Married but Separated | 1.9% | 4.2% | 1.8% |
| Single Population | 27.7% | 54.0% | 50.2% |
| Never Married | 13.6% | 24.8% | 33.8% |
| Divorced | 9.4% | 17.3% | 10.8% |
| Widowed | 4.7% | 11.9% | 5.6% |
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| Household Size | 2.11 | 1.92 | 2.60 |
| Households | 275 | 752 | 124,010,992 |
| Family Households | 173 | 373 | 80,755,759 |
| Married couple, w/children | 13.9% | 6.2% | 30.5% |
| Married couple, no children | 75.7% | 56.0% | 42.9% |
| Non Family Households | 102 | 379 | 43,255,233 |
| Single householder, w/children | 6.4% | 31.9% | 15.8% |
| Single householder, no children | 4.0% | 5.9% | 10.8% |