| | Winchester Bay, OR | Warrenton, OR | United States |
| Population | 333 | 6,123 | 329,725,481 |
| Female Population | 60.4% | 51.4% | 50.5% |
| Male Population | 39.6% | 48.6% | 49.5% |
| Median Age | 62.4 | 35.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 112 | 5,033 | 309,327,143 |
| Population - 2000 | 488 | 4,096 | 285,036,114 |
| Population - 1990 | 550 | 2,681 | 251,960,433 |
| Pop. 2000 to Now | -18.4% | 40.1% | 15.6% |
| Pop. 1990 to Now | -27.6% | 114.1% | 30.8% |
| space4 | | | |
| Population Density | 124.6 | 483.8 | 93.4 |
| Land Area | 2.7 | 12.7 | 3,531,905.4 |
| Water Area | 0.9 | 4.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Winchester Bay, OR | Warrenton, OR | United States |
| Age 0 to 4 | 0.0% | 3.9% | 5.9% |
| Age 5 to 9 | 0.0% | 6.3% | 6.1% |
| Age 10 to 14 | 0.0% | 9.1% | 6.6% |
| Age 15 to 17 | 0.0% | 5.2% | 3.9% |
| Age 18 to 20 | 2.7% | 4.4% | 4.0% |
| Age 21 to 24 | 1.5% | 4.1% | 5.2% |
| Age 25 to 34 | 0.0% | 16.2% | 13.8% |
| Age 35 to 44 | 9.3% | 13.1% | 12.9% |
| Age 45 to 54 | 25.2% | 8.6% | 12.6% |
| Age 55 to 59 | 5.4% | 4.2% | 6.7% |
| Age 60 to 64 | 14.4% | 5.7% | 6.3% |
| Age 65 to 74 | 38.7% | 12.3% | 9.6% |
| Age 75 to 84 | 2.7% | 5.1% | 4.5% |
| Age 85 and over | 0.0% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Winchester Bay, OR | Warrenton, OR | United States |
| White | 91.3% | 78.4% | 59.4% |
| Black | 0.0% | 0.2% | 12.2% |
| Asian | 0.0% | 2.3% | 5.6% |
| Native American | 7.8% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.8% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 9.5% | 3.2% |
| Hispanic | 0.0% | 8.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Winchester Bay, OR | Warrenton, OR | United States |
| Married Population | 61.0% | 49.6% | 49.8% |
| Currently Married | 55.6% | 48.5% | 48.0% |
| Married but Separated | 5.4% | 1.2% | 1.8% |
| Single Population | 39.0% | 50.4% | 50.2% |
| Never Married | 31.5% | 26.4% | 33.8% |
| Divorced | 0.0% | 17.8% | 10.8% |
| Widowed | 7.5% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 1.91 | 2.69 | 2.60 |
| Households | 167 | 2,241 | 124,010,992 |
| Family Households | 120 | 1,482 | 80,755,759 |
| Married couple, w/children | 0.0% | 30.5% | 30.5% |
| Married couple, no children | 79.2% | 43.6% | 42.9% |
| Non Family Households | 47 | 759 | 43,255,233 |
| Single householder, w/children | 0.0% | 15.5% | 15.8% |
| Single householder, no children | 20.8% | 10.5% | 10.8% |