| | Carolina Beach, NC | Fernandina Beach, FL | United States |
| Population | 6,456 | 12,697 | 329,725,481 |
| Female Population | 51.1% | 49.8% | 50.5% |
| Male Population | 48.9% | 50.3% | 49.5% |
| Median Age | 51 | 56.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,724 | 11,377 | 309,327,143 |
| Population - 2000 | 4,701 | 10,549 | 285,036,114 |
| Population - 1990 | 3,630 | 8,765 | 251,960,433 |
| Pop. 2000 to Now | 35.5% | 26.0% | 15.6% |
| Pop. 1990 to Now | 75.5% | 51.6% | 30.8% |
| space4 | | | |
| Population Density | 2,633.0 | 1,109.9 | 93.4 |
| Land Area | 2.5 | 11.4 | 3,531,905.4 |
| Water Area | 0.3 | 0.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Carolina Beach, NC | Fernandina Beach, FL | United States |
| Age 0 to 4 | 4.0% | 4.0% | 5.9% |
| Age 5 to 9 | 2.3% | 2.5% | 6.1% |
| Age 10 to 14 | 4.5% | 2.6% | 6.6% |
| Age 15 to 17 | 2.2% | 1.7% | 3.9% |
| Age 18 to 20 | 1.4% | 2.9% | 4.0% |
| Age 21 to 24 | 5.4% | 2.9% | 5.2% |
| Age 25 to 34 | 8.5% | 8.9% | 13.8% |
| Age 35 to 44 | 14.5% | 8.4% | 12.9% |
| Age 45 to 54 | 17.4% | 13.6% | 12.6% |
| Age 55 to 59 | 6.5% | 9.5% | 6.7% |
| Age 60 to 64 | 12.5% | 9.6% | 6.3% |
| Age 65 to 74 | 15.6% | 20.5% | 9.6% |
| Age 75 to 84 | 4.7% | 11.0% | 4.5% |
| Age 85 and over | 0.6% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Carolina Beach, NC | Fernandina Beach, FL | United States |
| White | 96.5% | 74.1% | 59.4% |
| Black | 0.1% | 11.7% | 12.2% |
| Asian | 0.2% | 1.7% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 1.1% | 0.6% | 3.2% |
| Hispanic | 1.7% | 11.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Carolina Beach, NC | Fernandina Beach, FL | United States |
| Married Population | 60.5% | 53.2% | 49.8% |
| Currently Married | 58.1% | 52.4% | 48.0% |
| Married but Separated | 2.4% | 0.8% | 1.8% |
| Single Population | 39.5% | 46.8% | 50.2% |
| Never Married | 23.3% | 23.7% | 33.8% |
| Divorced | 12.2% | 13.5% | 10.8% |
| Widowed | 4.0% | 9.6% | 5.6% |
| space5 | | | |
| Household Size | 2.19 | 2.12 | 2.60 |
| Households | 2,945 | 5,869 | 124,010,992 |
| Family Households | 1,757 | 3,745 | 80,755,759 |
| Married couple, w/children | 19.3% | 11.8% | 30.5% |
| Married couple, no children | 64.2% | 62.8% | 42.9% |
| Non Family Households | 1,188 | 2,124 | 43,255,233 |
| Single householder, w/children | 7.5% | 6.9% | 15.8% |
| Single householder, no children | 9.1% | 18.5% | 10.8% |