| | Atlantic Beach, NC | Dunn, NC | United States |
| Population | 1,689 | 8,616 | 329,725,481 |
| Female Population | 49.7% | 57.1% | 50.5% |
| Male Population | 50.3% | 42.9% | 49.5% |
| Median Age | 59.7 | 42 | 38.4 |
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| Population - 2010 | 1,504 | 9,326 | 309,327,143 |
| Population - 2000 | 1,781 | 9,196 | 285,036,114 |
| Population - 1990 | 1,938 | 8,336 | 251,960,433 |
| Pop. 2000 to Now | -14.9% | 5.3% | 15.6% |
| Pop. 1990 to Now | -21.8% | 16.2% | 30.8% |
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| Population Density | 722.1 | 1,260.4 | 93.4 |
| Land Area | 2.3 | 6.8 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Atlantic Beach, NC | Dunn, NC | United States |
| Age 0 to 4 | 1.1% | 5.1% | 5.9% |
| Age 5 to 9 | 4.5% | 5.5% | 6.1% |
| Age 10 to 14 | 4.1% | 6.4% | 6.6% |
| Age 15 to 17 | 3.2% | 2.9% | 3.9% |
| Age 18 to 20 | 0.5% | 2.9% | 4.0% |
| Age 21 to 24 | 0.6% | 5.8% | 5.2% |
| Age 25 to 34 | 7.7% | 14.6% | 13.8% |
| Age 35 to 44 | 5.4% | 9.8% | 12.9% |
| Age 45 to 54 | 15.0% | 10.9% | 12.6% |
| Age 55 to 59 | 8.0% | 6.5% | 6.7% |
| Age 60 to 64 | 7.8% | 6.6% | 6.3% |
| Age 65 to 74 | 22.1% | 12.6% | 9.6% |
| Age 75 to 84 | 12.1% | 7.1% | 4.5% |
| Age 85 and over | 7.9% | 3.3% | 1.9% |
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| Race | | | |
| | Atlantic Beach, NC | Dunn, NC | United States |
| White | 98.4% | 49.6% | 59.4% |
| Black | 0.7% | 39.9% | 12.2% |
| Asian | 0.0% | 0.5% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.8% | 1.3% | 3.2% |
| Hispanic | 0.0% | 8.0% | 18.4% |
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| Marriage & Family | | | |
| | Atlantic Beach, NC | Dunn, NC | United States |
| Married Population | 55.4% | 41.9% | 49.8% |
| Currently Married | 51.0% | 38.0% | 48.0% |
| Married but Separated | 4.4% | 3.9% | 1.8% |
| Single Population | 44.6% | 58.1% | 50.2% |
| Never Married | 19.0% | 35.1% | 33.8% |
| Divorced | 18.1% | 11.1% | 10.8% |
| Widowed | 7.5% | 11.9% | 5.6% |
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| Household Size | 1.87 | 2.26 | 2.60 |
| Households | 905 | 3,721 | 124,010,992 |
| Family Households | 441 | 2,112 | 80,755,759 |
| Married couple, w/children | 15.2% | 18.0% | 30.5% |
| Married couple, no children | 66.9% | 39.6% | 42.9% |
| Non Family Households | 464 | 1,609 | 43,255,233 |
| Single householder, w/children | 8.4% | 28.8% | 15.8% |
| Single householder, no children | 9.5% | 13.6% | 10.8% |