| | Quartz Hill, CA | Bear Valley Springs, CA | United States |
| Population | 10,079 | 5,067 | 329,725,481 |
| Female Population | 48.3% | 47.2% | 50.5% |
| Male Population | 51.7% | 52.9% | 49.5% |
| Median Age | 40 | 57.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,398 | 6,011 | 309,327,143 |
| Population - 2000 | 9,890 | 4,232 | 285,036,114 |
| Population - 1990 | 9,626 | 1,593 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 31.0% | 15.6% |
| Pop. 1990 to Now | 3.5% | 247.9% | 30.8% |
| space4 | | | |
| Population Density | 2,677.7 | 122.1 | 93.4 |
| Land Area | 3.8 | 41.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Quartz Hill, CA | Bear Valley Springs, CA | United States |
| Age 0 to 4 | 6.5% | 3.2% | 5.9% |
| Age 5 to 9 | 3.1% | 5.0% | 6.1% |
| Age 10 to 14 | 6.2% | 5.5% | 6.6% |
| Age 15 to 17 | 5.1% | 2.5% | 3.9% |
| Age 18 to 20 | 5.4% | 2.3% | 4.0% |
| Age 21 to 24 | 3.6% | 1.8% | 5.2% |
| Age 25 to 34 | 14.2% | 9.3% | 13.8% |
| Age 35 to 44 | 11.9% | 7.6% | 12.9% |
| Age 45 to 54 | 14.6% | 8.9% | 12.6% |
| Age 55 to 59 | 6.2% | 9.3% | 6.7% |
| Age 60 to 64 | 7.1% | 9.0% | 6.3% |
| Age 65 to 74 | 10.2% | 21.4% | 9.6% |
| Age 75 to 84 | 4.5% | 10.9% | 4.5% |
| Age 85 and over | 1.4% | 3.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Quartz Hill, CA | Bear Valley Springs, CA | United States |
| White | 53.8% | 80.4% | 59.4% |
| Black | 6.5% | 0.8% | 12.2% |
| Asian | 2.9% | 2.8% | 5.6% |
| Native American | 2.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.5% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.1% | 5.2% | 3.2% |
| Hispanic | 30.0% | 10.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Quartz Hill, CA | Bear Valley Springs, CA | United States |
| Married Population | 45.2% | 66.0% | 49.8% |
| Currently Married | 43.6% | 65.2% | 48.0% |
| Married but Separated | 1.5% | 0.8% | 1.8% |
| Single Population | 54.8% | 34.0% | 50.2% |
| Never Married | 35.9% | 20.0% | 33.8% |
| Divorced | 12.9% | 8.1% | 10.8% |
| Widowed | 6.1% | 5.9% | 5.6% |
| space5 | | | |
| Household Size | 2.73 | 2.21 | 2.60 |
| Households | 3,678 | 2,291 | 124,010,992 |
| Family Households | 2,387 | 1,580 | 80,755,759 |
| Married couple, w/children | 26.8% | 20.0% | 30.5% |
| Married couple, no children | 38.5% | 72.0% | 42.9% |
| Non Family Households | 1,291 | 711 | 43,255,233 |
| Single householder, w/children | 19.6% | 0.8% | 15.8% |
| Single householder, no children | 15.1% | 7.2% | 10.8% |