| | Sudden Valley, WA | Roseville, CA | United States |
| Population | 7,251 | 145,687 | 329,725,481 |
| Female Population | 49.5% | 51.1% | 50.5% |
| Male Population | 50.5% | 48.9% | 49.5% |
| Median Age | 42.7 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,713 | 119,960 | 309,327,143 |
| Population - 2000 | 4,165 | 79,921 | 285,036,114 |
| Population - 1990 | 2,615 | 44,685 | 251,960,433 |
| Pop. 2000 to Now | 99.5% | 81.1% | 15.6% |
| Pop. 1990 to Now | 217.7% | 223.9% | 30.8% |
| space4 | | | |
| Population Density | 1,159.4 | 3,382.6 | 93.4 |
| Land Area | 6.3 | 43.1 | 3,531,905.4 |
| Water Area | 1.9 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sudden Valley, WA | Roseville, CA | United States |
| Age 0 to 4 | 2.9% | 6.0% | 5.9% |
| Age 5 to 9 | 6.9% | 6.0% | 6.1% |
| Age 10 to 14 | 9.2% | 7.1% | 6.6% |
| Age 15 to 17 | 4.4% | 4.3% | 3.9% |
| Age 18 to 20 | 1.7% | 3.3% | 4.0% |
| Age 21 to 24 | 0.7% | 4.3% | 5.2% |
| Age 25 to 34 | 10.5% | 12.9% | 13.8% |
| Age 35 to 44 | 19.7% | 14.3% | 12.9% |
| Age 45 to 54 | 10.9% | 13.3% | 12.6% |
| Age 55 to 59 | 4.5% | 6.6% | 6.7% |
| Age 60 to 64 | 5.6% | 5.6% | 6.3% |
| Age 65 to 74 | 13.5% | 9.1% | 9.6% |
| Age 75 to 84 | 6.7% | 4.7% | 4.5% |
| Age 85 and over | 2.8% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sudden Valley, WA | Roseville, CA | United States |
| White | 79.6% | 65.2% | 59.4% |
| Black | 0.6% | 2.0% | 12.2% |
| Asian | 1.7% | 11.8% | 5.6% |
| Native American | 0.4% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.2% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 7.7% | 4.7% | 3.2% |
| Hispanic | 9.8% | 15.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sudden Valley, WA | Roseville, CA | United States |
| Married Population | 63.6% | 55.7% | 49.8% |
| Currently Married | 63.6% | 54.2% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 36.4% | 44.3% | 50.2% |
| Never Married | 18.5% | 27.7% | 33.8% |
| Divorced | 10.9% | 11.1% | 10.8% |
| Widowed | 7.1% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.65 | 2.60 |
| Households | 2,822 | 54,571 | 124,010,992 |
| Family Households | 2,178 | 38,429 | 80,755,759 |
| Married couple, w/children | 27.4% | 36.9% | 30.5% |
| Married couple, no children | 55.7% | 41.3% | 42.9% |
| Non Family Households | 644 | 16,142 | 43,255,233 |
| Single householder, w/children | 10.7% | 12.2% | 15.8% |
| Single householder, no children | 6.2% | 9.7% | 10.8% |