| | Lake Tapps, WA | Auburn, WA | United States |
| Population | 12,570 | 85,306 | 329,725,481 |
| Female Population | 47.9% | 49.5% | 50.5% |
| Male Population | 52.1% | 50.6% | 49.5% |
| Median Age | 41.9 | 35.6 | 38.4 |
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| Population - 2010 | 11,274 | 70,560 | 309,327,143 |
| Population - 2000 | 10,227 | 40,314 | 285,036,114 |
| Population - 1990 | 8,205 | 33,102 | 251,960,433 |
| Pop. 2000 to Now | 38.6% | 101.0% | 15.6% |
| Pop. 1990 to Now | 72.7% | 144.8% | 30.8% |
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| Population Density | 1,018.7 | 2,891.6 | 93.4 |
| Land Area | 12.3 | 29.5 | 3,531,905.4 |
| Water Area | 0.8 | 0.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lake Tapps, WA | Auburn, WA | United States |
| Age 0 to 4 | 4.9% | 6.7% | 5.9% |
| Age 5 to 9 | 6.9% | 7.4% | 6.1% |
| Age 10 to 14 | 8.1% | 6.9% | 6.6% |
| Age 15 to 17 | 4.6% | 4.7% | 3.9% |
| Age 18 to 20 | 4.3% | 3.1% | 4.0% |
| Age 21 to 24 | 4.5% | 5.3% | 5.2% |
| Age 25 to 34 | 6.6% | 15.0% | 13.8% |
| Age 35 to 44 | 13.9% | 14.6% | 12.9% |
| Age 45 to 54 | 16.2% | 12.9% | 12.6% |
| Age 55 to 59 | 7.5% | 6.1% | 6.7% |
| Age 60 to 64 | 8.4% | 6.0% | 6.3% |
| Age 65 to 74 | 9.5% | 7.1% | 9.6% |
| Age 75 to 84 | 3.7% | 2.9% | 4.5% |
| Age 85 and over | 0.8% | 1.3% | 1.9% |
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| Race | | | |
| | Lake Tapps, WA | Auburn, WA | United States |
| White | 81.4% | 50.9% | 59.4% |
| Black | 0.4% | 7.1% | 12.2% |
| Asian | 2.8% | 12.0% | 5.6% |
| Native American | 0.5% | 1.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.6% | 2.8% | 0.2% |
| Other | 0.2% | 0.5% | 0.4% |
| Two or More Races | 7.3% | 7.8% | 3.2% |
| Hispanic | 6.7% | 17.4% | 18.4% |
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| Marriage & Family | | | |
| | Lake Tapps, WA | Auburn, WA | United States |
| Married Population | 62.2% | 49.7% | 49.8% |
| Currently Married | 62.1% | 48.6% | 48.0% |
| Married but Separated | 0.2% | 1.1% | 1.8% |
| Single Population | 37.8% | 50.3% | 50.2% |
| Never Married | 24.2% | 33.3% | 33.8% |
| Divorced | 10.5% | 12.5% | 10.8% |
| Widowed | 3.1% | 4.5% | 5.6% |
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| Household Size | 2.82 | 2.77 | 2.60 |
| Households | 4,462 | 30,547 | 124,010,992 |
| Family Households | 3,481 | 20,599 | 80,755,759 |
| Married couple, w/children | 37.8% | 37.6% | 30.5% |
| Married couple, no children | 49.6% | 34.5% | 42.9% |
| Non Family Households | 981 | 9,948 | 43,255,233 |
| Single householder, w/children | 7.7% | 15.4% | 15.8% |
| Single householder, no children | 4.9% | 12.4% | 10.8% |