| | Whidbey Island Station, WA | Three Rivers, CA | United States |
| Population | 2,644 | 2,601 | 329,725,481 |
| Female Population | 18.8% | 42.8% | 50.5% |
| Male Population | 81.2% | 57.2% | 49.5% |
| Median Age | 22.2 | 51.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,071 | 1,949 | 309,327,143 |
| Population - 2000 | 2,010 | 2,248 | 285,036,114 |
| Population - 1990 | 3,702 | 2,211 | 251,960,433 |
| Pop. 2000 to Now | 3.5% | 2.4% | 15.6% |
| Pop. 1990 to Now | -43.8% | 4.1% | 30.8% |
| space4 | | | |
| Population Density | 402.5 | 58.5 | 93.4 |
| Land Area | 6.6 | 44.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Whidbey Island Station, WA | Three Rivers, CA | United States |
| Age 0 to 4 | 0.5% | 1.1% | 5.9% |
| Age 5 to 9 | 0.0% | 4.7% | 6.1% |
| Age 10 to 14 | 0.2% | 8.2% | 6.6% |
| Age 15 to 17 | 0.4% | 3.6% | 3.9% |
| Age 18 to 20 | 21.9% | 0.5% | 4.0% |
| Age 21 to 24 | 61.9% | 1.6% | 5.2% |
| Age 25 to 34 | 14.6% | 7.8% | 13.8% |
| Age 35 to 44 | 0.6% | 7.2% | 12.9% |
| Age 45 to 54 | 0.0% | 20.4% | 12.6% |
| Age 55 to 59 | 0.0% | 12.2% | 6.7% |
| Age 60 to 64 | 0.0% | 7.8% | 6.3% |
| Age 65 to 74 | 0.0% | 17.2% | 9.6% |
| Age 75 to 84 | 0.0% | 6.3% | 4.5% |
| Age 85 and over | 0.0% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Whidbey Island Station, WA | Three Rivers, CA | United States |
| White | 41.5% | 78.0% | 59.4% |
| Black | 12.9% | 2.1% | 12.2% |
| Asian | 2.0% | 5.3% | 5.6% |
| Native American | 7.5% | 0.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.9% | 2.9% | 3.2% |
| Hispanic | 32.3% | 10.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Whidbey Island Station, WA | Three Rivers, CA | United States |
| Married Population | 8.0% | 56.2% | 49.8% |
| Currently Married | 8.0% | 54.1% | 48.0% |
| Married but Separated | 0.0% | 2.1% | 1.8% |
| Single Population | 92.0% | 43.8% | 50.2% |
| Never Married | 91.5% | 20.8% | 33.8% |
| Divorced | 0.4% | 18.1% | 10.8% |
| Widowed | 0.0% | 5.0% | 5.6% |
| space5 | | | |
| Household Size | 1.61 | 2.03 | 2.60 |
| Households | 80 | 1,278 | 124,010,992 |
| Family Households | 44 | 821 | 80,755,759 |
| Married couple, w/children | 22.7% | 16.1% | 30.5% |
| Married couple, no children | 47.7% | 51.4% | 42.9% |
| Non Family Households | 36 | 457 | 43,255,233 |
| Single householder, w/children | 9.1% | 26.9% | 15.8% |
| Single householder, no children | 20.5% | 5.6% | 10.8% |