| | Grandview, WA | Moses Lake, WA | United States |
| Population | 10,894 | 24,764 | 329,725,481 |
| Female Population | 50.1% | 52.0% | 50.5% |
| Male Population | 50.0% | 48.0% | 49.5% |
| Median Age | 27.4 | 31 | 38.4 |
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| Population - 2010 | 10,888 | 20,460 | 309,327,143 |
| Population - 2000 | 8,377 | 14,953 | 285,036,114 |
| Population - 1990 | 7,169 | 11,235 | 251,960,433 |
| Pop. 2000 to Now | 31.7% | 62.3% | 15.6% |
| Pop. 1990 to Now | 53.8% | 116.1% | 30.8% |
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| Population Density | 1,700.1 | 1,373.7 | 93.4 |
| Land Area | 6.4 | 18.0 | 3,531,905.4 |
| Water Area | 0.1 | 2.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Grandview, WA | Moses Lake, WA | United States |
| Age 0 to 4 | 10.3% | 7.5% | 5.9% |
| Age 5 to 9 | 11.5% | 8.8% | 6.1% |
| Age 10 to 14 | 12.0% | 7.6% | 6.6% |
| Age 15 to 17 | 4.3% | 6.1% | 3.9% |
| Age 18 to 20 | 3.2% | 3.9% | 4.0% |
| Age 21 to 24 | 6.1% | 6.8% | 5.2% |
| Age 25 to 34 | 16.7% | 15.0% | 13.8% |
| Age 35 to 44 | 9.6% | 12.1% | 12.9% |
| Age 45 to 54 | 11.2% | 11.7% | 12.6% |
| Age 55 to 59 | 4.1% | 3.2% | 6.7% |
| Age 60 to 64 | 4.1% | 3.9% | 6.3% |
| Age 65 to 74 | 4.3% | 6.3% | 9.6% |
| Age 75 to 84 | 2.0% | 5.5% | 4.5% |
| Age 85 and over | 0.7% | 1.7% | 1.9% |
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| Race | | | |
| | Grandview, WA | Moses Lake, WA | United States |
| White | 11.6% | 53.9% | 59.4% |
| Black | 0.1% | 3.0% | 12.2% |
| Asian | 0.3% | 1.3% | 5.6% |
| Native American | 0.0% | 1.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.4% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 3.2% | 3.2% |
| Hispanic | 87.0% | 37.3% | 18.4% |
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| Marriage & Family | | | |
| | Grandview, WA | Moses Lake, WA | United States |
| Married Population | 47.8% | 42.4% | 49.8% |
| Currently Married | 44.6% | 40.6% | 48.0% |
| Married but Separated | 3.1% | 1.8% | 1.8% |
| Single Population | 52.2% | 57.6% | 50.2% |
| Never Married | 42.3% | 37.6% | 33.8% |
| Divorced | 7.4% | 12.8% | 10.8% |
| Widowed | 2.5% | 7.2% | 5.6% |
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| Household Size | 3.43 | 2.81 | 2.60 |
| Households | 3,166 | 8,748 | 124,010,992 |
| Family Households | 2,585 | 5,352 | 80,755,759 |
| Married couple, w/children | 25.5% | 35.0% | 30.5% |
| Married couple, no children | 30.0% | 29.1% | 42.9% |
| Non Family Households | 581 | 3,396 | 43,255,233 |
| Single householder, w/children | 38.4% | 25.8% | 15.8% |
| Single householder, no children | 6.1% | 10.1% | 10.8% |