| | Rosburg, WA | Carson, WA | United States |
| Population | 381 | 2,602 | 329,725,481 |
| Female Population | 46.7% | 52.3% | 50.5% |
| Male Population | 53.3% | 47.7% | 49.5% |
| Median Age | 34.8 | 45.8 | 38.4 |
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| Population - 2010 | 255 | 2,296 | 309,327,143 |
| Population - 2000 | 299 | 2,134 | 285,036,114 |
| Population - 1990 | 299 | 1,769 | 251,960,433 |
| Pop. 2000 to Now | 45.2% | 33.9% | 15.6% |
| Pop. 1990 to Now | 45.2% | 61.6% | 30.8% |
| space4 | | | |
| Population Density | 16.6 | 543.1 | 93.4 |
| Land Area | 22.9 | 4.8 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rosburg, WA | Carson, WA | United States |
| Age 0 to 4 | 3.7% | 5.9% | 5.9% |
| Age 5 to 9 | 13.4% | 3.3% | 6.1% |
| Age 10 to 14 | 19.7% | 6.3% | 6.6% |
| Age 15 to 17 | 2.4% | 2.2% | 3.9% |
| Age 18 to 20 | 0.0% | 1.5% | 4.0% |
| Age 21 to 24 | 0.0% | 3.8% | 5.2% |
| Age 25 to 34 | 12.6% | 15.7% | 13.8% |
| Age 35 to 44 | 12.1% | 8.8% | 12.9% |
| Age 45 to 54 | 9.7% | 13.1% | 12.6% |
| Age 55 to 59 | 5.0% | 9.9% | 6.7% |
| Age 60 to 64 | 6.6% | 9.5% | 6.3% |
| Age 65 to 74 | 12.3% | 8.7% | 9.6% |
| Age 75 to 84 | 2.6% | 5.4% | 4.5% |
| Age 85 and over | 0.0% | 5.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rosburg, WA | Carson, WA | United States |
| White | 71.7% | 87.2% | 59.4% |
| Black | 6.6% | 0.0% | 12.2% |
| Asian | 2.4% | 0.8% | 5.6% |
| Native American | 0.0% | 4.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 19.4% | 2.4% | 3.2% |
| Hispanic | 0.0% | 4.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rosburg, WA | Carson, WA | United States |
| Married Population | 75.1% | 48.3% | 49.8% |
| Currently Married | 75.1% | 47.2% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 24.9% | 51.7% | 50.2% |
| Never Married | 3.7% | 28.5% | 33.8% |
| Divorced | 17.4% | 16.3% | 10.8% |
| Widowed | 3.7% | 7.0% | 5.6% |
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| Household Size | 2.89 | 2.57 | 2.60 |
| Households | 132 | 1,014 | 124,010,992 |
| Family Households | 92 | 695 | 80,755,759 |
| Married couple, w/children | 71.7% | 17.8% | 30.5% |
| Married couple, no children | 28.3% | 46.9% | 42.9% |
| Non Family Households | 40 | 319 | 43,255,233 |
| Single householder, w/children | 0.0% | 20.3% | 15.8% |
| Single householder, no children | 0.0% | 15.0% | 10.8% |