| | Preston, ID | Enumclaw, WA | United States |
| Population | 5,545 | 12,544 | 329,725,481 |
| Female Population | 46.0% | 50.1% | 50.5% |
| Male Population | 54.1% | 49.9% | 49.5% |
| Median Age | 38.6 | 40.3 | 38.4 |
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| Population - 2010 | 5,240 | 11,130 | 309,327,143 |
| Population - 2000 | 4,682 | 11,116 | 285,036,114 |
| Population - 1990 | 3,710 | 7,227 | 251,960,433 |
| Pop. 2000 to Now | 21.3% | 12.9% | 15.6% |
| Pop. 1990 to Now | 53.1% | 73.6% | 30.8% |
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| Population Density | 816.0 | 2,421.2 | 93.4 |
| Land Area | 6.8 | 5.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Preston, ID | Enumclaw, WA | United States |
| Age 0 to 4 | 4.8% | 5.4% | 5.9% |
| Age 5 to 9 | 11.8% | 5.7% | 6.1% |
| Age 10 to 14 | 6.8% | 7.4% | 6.6% |
| Age 15 to 17 | 4.3% | 3.0% | 3.9% |
| Age 18 to 20 | 3.8% | 3.9% | 4.0% |
| Age 21 to 24 | 2.9% | 3.5% | 5.2% |
| Age 25 to 34 | 12.2% | 12.6% | 13.8% |
| Age 35 to 44 | 12.4% | 14.2% | 12.9% |
| Age 45 to 54 | 10.2% | 10.3% | 12.6% |
| Age 55 to 59 | 8.8% | 7.4% | 6.7% |
| Age 60 to 64 | 6.5% | 8.1% | 6.3% |
| Age 65 to 74 | 8.1% | 10.9% | 9.6% |
| Age 75 to 84 | 5.8% | 4.5% | 4.5% |
| Age 85 and over | 1.5% | 3.1% | 1.9% |
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| Race | | | |
| | Preston, ID | Enumclaw, WA | United States |
| White | 89.3% | 77.0% | 59.4% |
| Black | 0.0% | 0.6% | 12.2% |
| Asian | 0.0% | 2.0% | 5.6% |
| Native American | 1.3% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.3% | 0.0% | 0.4% |
| Two or More Races | 3.2% | 6.0% | 3.2% |
| Hispanic | 4.8% | 13.7% | 18.4% |
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| Marriage & Family | | | |
| | Preston, ID | Enumclaw, WA | United States |
| Married Population | 59.7% | 51.5% | 49.8% |
| Currently Married | 59.6% | 50.3% | 48.0% |
| Married but Separated | 0.1% | 1.2% | 1.8% |
| Single Population | 40.3% | 48.5% | 50.2% |
| Never Married | 20.8% | 24.9% | 33.8% |
| Divorced | 12.6% | 14.7% | 10.8% |
| Widowed | 6.8% | 8.9% | 5.6% |
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| Household Size | 2.73 | 2.39 | 2.60 |
| Households | 2,010 | 5,191 | 124,010,992 |
| Family Households | 1,473 | 3,170 | 80,755,759 |
| Married couple, w/children | 32.5% | 31.3% | 30.5% |
| Married couple, no children | 50.2% | 46.9% | 42.9% |
| Non Family Households | 537 | 2,021 | 43,255,233 |
| Single householder, w/children | 14.6% | 13.2% | 15.8% |
| Single householder, no children | 2.8% | 8.5% | 10.8% |