| | Ritzville, WA | Carson, CA | United States |
| Population | 1,840 | 95,104 | 329,725,481 |
| Female Population | 49.3% | 50.7% | 50.5% |
| Male Population | 50.7% | 49.3% | 49.5% |
| Median Age | 42.6 | 40.9 | 38.4 |
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| Population - 2010 | 1,685 | 91,562 | 309,327,143 |
| Population - 2000 | 1,736 | 89,730 | 285,036,114 |
| Population - 1990 | 1,725 | 83,995 | 251,960,433 |
| Pop. 2000 to Now | -5.5% | 0.1% | 15.6% |
| Pop. 1990 to Now | -4.9% | 7.0% | 30.8% |
| space4 | | | |
| Population Density | 1,058.7 | 5,079.3 | 93.4 |
| Land Area | 1.7 | 18.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ritzville, WA | Carson, CA | United States |
| Age 0 to 4 | 3.5% | 4.8% | 5.9% |
| Age 5 to 9 | 7.6% | 5.2% | 6.1% |
| Age 10 to 14 | 9.0% | 6.3% | 6.6% |
| Age 15 to 17 | 3.4% | 4.1% | 3.9% |
| Age 18 to 20 | 4.2% | 3.7% | 4.0% |
| Age 21 to 24 | 3.0% | 5.2% | 5.2% |
| Age 25 to 34 | 12.9% | 13.9% | 13.8% |
| Age 35 to 44 | 9.1% | 12.5% | 12.9% |
| Age 45 to 54 | 10.1% | 13.3% | 12.6% |
| Age 55 to 59 | 6.5% | 6.8% | 6.7% |
| Age 60 to 64 | 11.5% | 7.4% | 6.3% |
| Age 65 to 74 | 12.1% | 9.7% | 9.6% |
| Age 75 to 84 | 5.5% | 4.9% | 4.5% |
| Age 85 and over | 1.5% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ritzville, WA | Carson, CA | United States |
| White | 81.4% | 7.0% | 59.4% |
| Black | 2.7% | 22.2% | 12.2% |
| Asian | 0.8% | 27.1% | 5.6% |
| Native American | 0.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.4% | 1.5% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 3.0% | 4.0% | 3.2% |
| Hispanic | 11.5% | 37.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ritzville, WA | Carson, CA | United States |
| Married Population | 44.2% | 47.2% | 49.8% |
| Currently Married | 42.2% | 45.0% | 48.0% |
| Married but Separated | 2.0% | 2.1% | 1.8% |
| Single Population | 55.9% | 52.8% | 50.2% |
| Never Married | 31.4% | 38.6% | 33.8% |
| Divorced | 17.1% | 8.3% | 10.8% |
| Widowed | 7.3% | 5.9% | 5.6% |
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| Household Size | 2.28 | 3.60 | 2.60 |
| Households | 771 | 26,095 | 124,010,992 |
| Family Households | 368 | 21,309 | 80,755,759 |
| Married couple, w/children | 30.4% | 27.8% | 30.5% |
| Married couple, no children | 44.6% | 37.8% | 42.9% |
| Non Family Households | 403 | 4,786 | 43,255,233 |
| Single householder, w/children | 13.9% | 14.6% | 15.8% |
| Single householder, no children | 11.1% | 19.7% | 10.8% |