| | Farmington, WA | Burien, WA | United States |
| Population | 126 | 51,646 | 329,725,481 |
| Female Population | 42.1% | 48.7% | 50.5% |
| Male Population | 57.9% | 51.3% | 49.5% |
| Median Age | 54.2 | 39.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 150 | 48,224 | 309,327,143 |
| Population - 2000 | 153 | 31,881 | 285,036,114 |
| Population - 1990 | 126 | 25,089 | 251,960,433 |
| Pop. 2000 to Now | -3.9% | 60.8% | 15.6% |
| Pop. 1990 to Now | 16.7% | 104.3% | 30.8% |
| space4 | | | |
| Population Density | 348.1 | 5,133.8 | 93.4 |
| Land Area | 0.4 | 10.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Farmington, WA | Burien, WA | United States |
| Age 0 to 4 | 1.6% | 5.6% | 5.9% |
| Age 5 to 9 | 0.0% | 5.8% | 6.1% |
| Age 10 to 14 | 1.6% | 5.7% | 6.6% |
| Age 15 to 17 | 7.9% | 4.0% | 3.9% |
| Age 18 to 20 | 7.1% | 2.7% | 4.0% |
| Age 21 to 24 | 0.0% | 4.8% | 5.2% |
| Age 25 to 34 | 7.9% | 13.3% | 13.8% |
| Age 35 to 44 | 5.6% | 16.0% | 12.9% |
| Age 45 to 54 | 22.2% | 14.1% | 12.6% |
| Age 55 to 59 | 10.3% | 6.7% | 6.7% |
| Age 60 to 64 | 14.3% | 6.6% | 6.3% |
| Age 65 to 74 | 13.5% | 9.1% | 9.6% |
| Age 75 to 84 | 7.9% | 3.9% | 4.5% |
| Age 85 and over | 0.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Farmington, WA | Burien, WA | United States |
| White | 90.5% | 47.9% | 59.4% |
| Black | 0.0% | 8.8% | 12.2% |
| Asian | 0.0% | 14.5% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.6% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 3.2% | 5.1% | 3.2% |
| Hispanic | 6.3% | 22.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Farmington, WA | Burien, WA | United States |
| Married Population | 52.5% | 48.0% | 49.8% |
| Currently Married | 47.5% | 45.0% | 48.0% |
| Married but Separated | 4.9% | 3.0% | 1.8% |
| Single Population | 47.5% | 52.0% | 50.2% |
| Never Married | 23.0% | 34.8% | 33.8% |
| Divorced | 18.9% | 12.4% | 10.8% |
| Widowed | 5.7% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 1.83 | 2.64 | 2.60 |
| Households | 69 | 19,364 | 124,010,992 |
| Family Households | 37 | 12,056 | 80,755,759 |
| Married couple, w/children | 27.0% | 29.3% | 30.5% |
| Married couple, no children | 56.8% | 38.2% | 42.9% |
| Non Family Households | 32 | 7,308 | 43,255,233 |
| Single householder, w/children | 2.7% | 19.9% | 15.8% |
| Single householder, no children | 13.5% | 12.6% | 10.8% |