| | Martinsville, NJ | Foxfire, NC | United States |
| Population | 11,980 | 1,720 | 329,725,481 |
| Female Population | 51.2% | 50.2% | 50.5% |
| Male Population | 48.8% | 49.8% | 49.5% |
| Median Age | 45.3 | 36.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 11,461 | 920 | 309,327,143 |
| Population - 2000 | 12,057 | 474 | 285,036,114 |
| Population - 1990 | 9,771 | 334 | 251,960,433 |
| Pop. 2000 to Now | -3.0% | 123.8% | 15.6% |
| Pop. 1990 to Now | 19.7% | 217.7% | 30.8% |
| space4 | | | |
| Population Density | 985.9 | 243.8 | 93.4 |
| Land Area | 12.2 | 7.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Martinsville, NJ | Foxfire, NC | United States |
| Age 0 to 4 | 6.4% | 5.5% | 5.9% |
| Age 5 to 9 | 4.9% | 7.4% | 6.1% |
| Age 10 to 14 | 7.4% | 14.0% | 6.6% |
| Age 15 to 17 | 5.0% | 5.4% | 3.9% |
| Age 18 to 20 | 3.3% | 2.6% | 4.0% |
| Age 21 to 24 | 4.8% | 1.5% | 5.2% |
| Age 25 to 34 | 7.7% | 8.1% | 13.8% |
| Age 35 to 44 | 10.2% | 17.6% | 12.9% |
| Age 45 to 54 | 14.5% | 7.4% | 12.6% |
| Age 55 to 59 | 8.9% | 4.2% | 6.7% |
| Age 60 to 64 | 7.2% | 4.7% | 6.3% |
| Age 65 to 74 | 9.9% | 13.3% | 9.6% |
| Age 75 to 84 | 6.8% | 5.9% | 4.5% |
| Age 85 and over | 3.0% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Martinsville, NJ | Foxfire, NC | United States |
| White | 75.6% | 72.0% | 59.4% |
| Black | 1.5% | 6.1% | 12.2% |
| Asian | 14.3% | 5.3% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 2.8% | 14.1% | 3.2% |
| Hispanic | 5.6% | 2.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Martinsville, NJ | Foxfire, NC | United States |
| Married Population | 64.9% | 61.0% | 49.8% |
| Currently Married | 64.6% | 58.9% | 48.0% |
| Married but Separated | 0.3% | 2.1% | 1.8% |
| Single Population | 35.1% | 39.0% | 50.2% |
| Never Married | 23.6% | 25.1% | 33.8% |
| Divorced | 4.9% | 6.5% | 10.8% |
| Widowed | 6.6% | 7.4% | 5.6% |
| space5 | | | |
| Household Size | 2.89 | 2.63 | 2.60 |
| Households | 4,088 | 654 | 124,010,992 |
| Family Households | 3,386 | 451 | 80,755,759 |
| Married couple, w/children | 38.9% | 38.8% | 30.5% |
| Married couple, no children | 51.5% | 43.2% | 42.9% |
| Non Family Households | 702 | 203 | 43,255,233 |
| Single householder, w/children | 3.7% | 10.9% | 15.8% |
| Single householder, no children | 6.0% | 7.1% | 10.8% |