| | Sedro-Woolley, WA | Lake Forest Park, WA | United States |
| Population | 12,266 | 13,529 | 329,725,481 |
| Female Population | 48.1% | 49.6% | 50.5% |
| Male Population | 51.9% | 50.5% | 49.5% |
| Median Age | 35.3 | 43.4 | 38.4 |
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| Population - 2010 | 11,057 | 12,639 | 309,327,143 |
| Population - 2000 | 8,658 | 13,142 | 285,036,114 |
| Population - 1990 | 6,031 | 4,031 | 251,960,433 |
| Pop. 2000 to Now | 40.7% | 2.2% | 15.6% |
| Pop. 1990 to Now | 102.0% | 233.2% | 30.8% |
| space4 | | | |
| Population Density | 2,836.7 | 3,844.6 | 93.4 |
| Land Area | 4.3 | 3.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Sedro-Woolley, WA | Lake Forest Park, WA | United States |
| Age 0 to 4 | 7.0% | 3.8% | 5.9% |
| Age 5 to 9 | 9.7% | 6.3% | 6.1% |
| Age 10 to 14 | 4.9% | 5.4% | 6.6% |
| Age 15 to 17 | 3.3% | 4.5% | 3.9% |
| Age 18 to 20 | 4.4% | 2.1% | 4.0% |
| Age 21 to 24 | 5.7% | 3.6% | 5.2% |
| Age 25 to 34 | 14.1% | 14.6% | 13.8% |
| Age 35 to 44 | 17.2% | 11.0% | 12.9% |
| Age 45 to 54 | 10.1% | 16.0% | 12.6% |
| Age 55 to 59 | 4.1% | 7.8% | 6.7% |
| Age 60 to 64 | 6.0% | 6.8% | 6.3% |
| Age 65 to 74 | 9.0% | 11.0% | 9.6% |
| Age 75 to 84 | 3.1% | 4.8% | 4.5% |
| Age 85 and over | 1.6% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sedro-Woolley, WA | Lake Forest Park, WA | United States |
| White | 67.7% | 77.4% | 59.4% |
| Black | 0.6% | 3.7% | 12.2% |
| Asian | 2.1% | 7.5% | 5.6% |
| Native American | 0.1% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.5% | 0.2% |
| Other | 0.1% | 0.6% | 0.4% |
| Two or More Races | 4.9% | 5.7% | 3.2% |
| Hispanic | 24.4% | 4.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sedro-Woolley, WA | Lake Forest Park, WA | United States |
| Married Population | 49.5% | 59.8% | 49.8% |
| Currently Married | 47.4% | 59.5% | 48.0% |
| Married but Separated | 2.1% | 0.3% | 1.8% |
| Single Population | 50.5% | 40.2% | 50.2% |
| Never Married | 33.1% | 27.8% | 33.8% |
| Divorced | 13.3% | 8.8% | 10.8% |
| Widowed | 4.1% | 3.6% | 5.6% |
| space5 | | | |
| Household Size | 2.60 | 2.53 | 2.60 |
| Households | 4,476 | 5,308 | 124,010,992 |
| Family Households | 3,134 | 3,680 | 80,755,759 |
| Married couple, w/children | 29.0% | 37.1% | 30.5% |
| Married couple, no children | 35.9% | 51.0% | 42.9% |
| Non Family Households | 1,342 | 1,628 | 43,255,233 |
| Single householder, w/children | 23.2% | 5.1% | 15.8% |
| Single householder, no children | 12.0% | 6.8% | 10.8% |