| | Pacifica, CA | Orick, CA | United States |
| Population | 38,595 | 300 | 329,725,481 |
| Female Population | 49.3% | 48.3% | 50.5% |
| Male Population | 50.7% | 51.7% | 49.5% |
| Median Age | 43.4 | 32.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 37,388 | 315 | 309,327,143 |
| Population - 2000 | 38,390 | 313 | 285,036,114 |
| Population - 1990 | 37,670 | 364 | 251,960,433 |
| Pop. 2000 to Now | -1.0% | -5.8% | 15.6% |
| Pop. 1990 to Now | 0.9% | -19.0% | 30.8% |
| space4 | | | |
| Population Density | 3,049.5 | 63.2 | 93.4 |
| Land Area | 12.7 | 4.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pacifica, CA | Orick, CA | United States |
| Age 0 to 4 | 5.3% | 8.7% | 5.9% |
| Age 5 to 9 | 5.0% | 2.0% | 6.1% |
| Age 10 to 14 | 5.5% | 9.0% | 6.6% |
| Age 15 to 17 | 3.7% | 2.7% | 3.9% |
| Age 18 to 20 | 2.0% | 2.3% | 4.0% |
| Age 21 to 24 | 3.8% | 5.7% | 5.2% |
| Age 25 to 34 | 13.1% | 22.0% | 13.8% |
| Age 35 to 44 | 13.5% | 10.0% | 12.9% |
| Age 45 to 54 | 14.7% | 15.3% | 12.6% |
| Age 55 to 59 | 7.4% | 3.3% | 6.7% |
| Age 60 to 64 | 7.0% | 4.7% | 6.3% |
| Age 65 to 74 | 12.2% | 12.0% | 9.6% |
| Age 75 to 84 | 5.4% | 1.7% | 4.5% |
| Age 85 and over | 1.3% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Pacifica, CA | Orick, CA | United States |
| White | 51.6% | 60.7% | 59.4% |
| Black | 2.3% | 0.0% | 12.2% |
| Asian | 20.5% | 0.0% | 5.6% |
| Native American | 0.0% | 4.3% | 0.6% |
| Hawaiian, Pacific Islander | 1.1% | 0.0% | 0.2% |
| Other | 0.8% | 0.7% | 0.4% |
| Two or More Races | 5.0% | 25.3% | 3.2% |
| Hispanic | 18.6% | 9.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Pacifica, CA | Orick, CA | United States |
| Married Population | 54.6% | 23.2% | 49.8% |
| Currently Married | 52.9% | 23.2% | 48.0% |
| Married but Separated | 1.7% | 0.0% | 1.8% |
| Single Population | 45.4% | 76.8% | 50.2% |
| Never Married | 30.6% | 49.0% | 33.8% |
| Divorced | 9.9% | 20.3% | 10.8% |
| Widowed | 5.0% | 7.5% | 5.6% |
| space5 | | | |
| Household Size | 2.75 | 3.16 | 2.60 |
| Households | 13,986 | 95 | 124,010,992 |
| Family Households | 9,971 | 46 | 80,755,759 |
| Married couple, w/children | 30.9% | 17.4% | 30.5% |
| Married couple, no children | 47.3% | 23.9% | 42.9% |
| Non Family Households | 4,015 | 49 | 43,255,233 |
| Single householder, w/children | 10.0% | 30.4% | 15.8% |
| Single householder, no children | 11.7% | 28.3% | 10.8% |