| | Lapwai, ID | Quartz Hill, CA | United States |
| Population | 1,486 | 10,079 | 329,725,481 |
| Female Population | 53.4% | 48.3% | 50.5% |
| Male Population | 46.6% | 51.7% | 49.5% |
| Median Age | 31.9 | 40 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,129 | 10,398 | 309,327,143 |
| Population - 2000 | 1,134 | 9,890 | 285,036,114 |
| Population - 1990 | 932 | 9,626 | 251,960,433 |
| Pop. 2000 to Now | 1.6% | 0.8% | 15.6% |
| Pop. 1990 to Now | 23.6% | 3.5% | 30.8% |
| space4 | | | |
| Population Density | 1,965.6 | 2,677.7 | 93.4 |
| Land Area | 0.8 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lapwai, ID | Quartz Hill, CA | United States |
| Age 0 to 4 | 7.9% | 6.5% | 5.9% |
| Age 5 to 9 | 8.6% | 3.1% | 6.1% |
| Age 10 to 14 | 10.8% | 6.2% | 6.6% |
| Age 15 to 17 | 6.1% | 5.1% | 3.9% |
| Age 18 to 20 | 5.2% | 5.4% | 4.0% |
| Age 21 to 24 | 2.4% | 3.6% | 5.2% |
| Age 25 to 34 | 18.5% | 14.2% | 13.8% |
| Age 35 to 44 | 12.0% | 11.9% | 12.9% |
| Age 45 to 54 | 6.1% | 14.6% | 12.6% |
| Age 55 to 59 | 4.2% | 6.2% | 6.7% |
| Age 60 to 64 | 7.6% | 7.1% | 6.3% |
| Age 65 to 74 | 6.3% | 10.2% | 9.6% |
| Age 75 to 84 | 2.8% | 4.5% | 4.5% |
| Age 85 and over | 1.7% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lapwai, ID | Quartz Hill, CA | United States |
| White | 13.3% | 53.8% | 59.4% |
| Black | 0.2% | 6.5% | 12.2% |
| Asian | 1.7% | 2.9% | 5.6% |
| Native American | 72.9% | 2.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.5% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 6.7% | 4.1% | 3.2% |
| Hispanic | 4.6% | 30.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lapwai, ID | Quartz Hill, CA | United States |
| Married Population | 38.4% | 45.2% | 49.8% |
| Currently Married | 36.3% | 43.6% | 48.0% |
| Married but Separated | 2.1% | 1.5% | 1.8% |
| Single Population | 61.6% | 54.8% | 50.2% |
| Never Married | 45.5% | 35.9% | 33.8% |
| Divorced | 10.0% | 12.9% | 10.8% |
| Widowed | 6.1% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 3.50 | 2.73 | 2.60 |
| Households | 421 | 3,678 | 124,010,992 |
| Family Households | 356 | 2,387 | 80,755,759 |
| Married couple, w/children | 33.1% | 26.8% | 30.5% |
| Married couple, no children | 19.7% | 38.5% | 42.9% |
| Non Family Households | 65 | 1,291 | 43,255,233 |
| Single householder, w/children | 32.3% | 19.6% | 15.8% |
| Single householder, no children | 14.9% | 15.1% | 10.8% |