| | Cambria, CA | Julian, CA | United States |
| Population | 5,487 | 1,332 | 329,725,481 |
| Female Population | 50.3% | 49.1% | 50.5% |
| Male Population | 49.7% | 50.9% | 49.5% |
| Median Age | 60.5 | 59.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,371 | 1,509 | 309,327,143 |
| Population - 2000 | 6,232 | 1,621 | 285,036,114 |
| Population - 1990 | 5,382 | 1,284 | 251,960,433 |
| Pop. 2000 to Now | -4.1% | -45.0% | 15.6% |
| Pop. 1990 to Now | 11.1% | -30.5% | 30.8% |
| space4 | | | |
| Population Density | 644.9 | 168.9 | 93.4 |
| Land Area | 8.5 | 7.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Cambria, CA | Julian, CA | United States |
| Age 0 to 4 | 2.2% | 5.1% | 5.9% |
| Age 5 to 9 | 3.5% | 2.9% | 6.1% |
| Age 10 to 14 | 3.4% | 3.2% | 6.6% |
| Age 15 to 17 | 1.9% | 0.0% | 3.9% |
| Age 18 to 20 | 2.2% | 2.1% | 4.0% |
| Age 21 to 24 | 1.5% | 0.0% | 5.2% |
| Age 25 to 34 | 4.2% | 12.6% | 13.8% |
| Age 35 to 44 | 6.2% | 8.9% | 12.9% |
| Age 45 to 54 | 12.6% | 2.1% | 12.6% |
| Age 55 to 59 | 10.9% | 14.4% | 6.7% |
| Age 60 to 64 | 10.1% | 9.2% | 6.3% |
| Age 65 to 74 | 25.4% | 29.9% | 9.6% |
| Age 75 to 84 | 11.5% | 9.5% | 4.5% |
| Age 85 and over | 4.2% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Cambria, CA | Julian, CA | United States |
| White | 70.8% | 81.6% | 59.4% |
| Black | 0.2% | 0.0% | 12.2% |
| Asian | 1.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.3% | 3.2% | 3.2% |
| Hispanic | 26.8% | 15.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Cambria, CA | Julian, CA | United States |
| Married Population | 61.2% | 64.3% | 49.8% |
| Currently Married | 59.6% | 64.3% | 48.0% |
| Married but Separated | 1.5% | 0.0% | 1.8% |
| Single Population | 38.8% | 35.7% | 50.2% |
| Never Married | 16.4% | 10.9% | 33.8% |
| Divorced | 14.4% | 22.6% | 10.8% |
| Widowed | 8.0% | 2.2% | 5.6% |
| space5 | | | |
| Household Size | 2.00 | 1.82 | 2.60 |
| Households | 2,739 | 731 | 124,010,992 |
| Family Households | 1,576 | 408 | 80,755,759 |
| Married couple, w/children | 17.1% | 14.5% | 30.5% |
| Married couple, no children | 73.7% | 71.8% | 42.9% |
| Non Family Households | 1,163 | 323 | 43,255,233 |
| Single householder, w/children | 3.0% | 7.4% | 15.8% |
| Single householder, no children | 6.2% | 6.4% | 10.8% |