| | Willamina, OR | Scio, OR | United States |
| Population | 2,511 | 894 | 329,725,481 |
| Female Population | 53.5% | 45.0% | 50.5% |
| Male Population | 46.5% | 55.0% | 49.5% |
| Median Age | 35.4 | 36.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,039 | 841 | 309,327,143 |
| Population - 2000 | 1,844 | 695 | 285,036,114 |
| Population - 1990 | 1,717 | 623 | 251,960,433 |
| Pop. 2000 to Now | 22.8% | 45.2% | 15.6% |
| Pop. 1990 to Now | 31.9% | 62.0% | 30.8% |
| space4 | | | |
| Population Density | 2,723.4 | 2,175.2 | 93.4 |
| Land Area | 0.9 | 0.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Willamina, OR | Scio, OR | United States |
| Age 0 to 4 | 8.4% | 12.6% | 5.9% |
| Age 5 to 9 | 5.7% | 5.1% | 6.1% |
| Age 10 to 14 | 10.9% | 7.8% | 6.6% |
| Age 15 to 17 | 2.2% | 3.9% | 3.9% |
| Age 18 to 20 | 2.1% | 2.5% | 4.0% |
| Age 21 to 24 | 5.9% | 1.6% | 5.2% |
| Age 25 to 34 | 13.7% | 14.9% | 13.8% |
| Age 35 to 44 | 11.0% | 13.0% | 12.9% |
| Age 45 to 54 | 11.4% | 11.1% | 12.6% |
| Age 55 to 59 | 8.5% | 7.8% | 6.7% |
| Age 60 to 64 | 5.5% | 4.6% | 6.3% |
| Age 65 to 74 | 7.8% | 11.7% | 9.6% |
| Age 75 to 84 | 3.7% | 3.4% | 4.5% |
| Age 85 and over | 3.1% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Willamina, OR | Scio, OR | United States |
| White | 81.3% | 87.9% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.4% | 0.0% | 5.6% |
| Native American | 3.7% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.3% | 1.2% | 3.2% |
| Hispanic | 12.1% | 9.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Willamina, OR | Scio, OR | United States |
| Married Population | 51.3% | 62.3% | 49.8% |
| Currently Married | 50.3% | 60.9% | 48.0% |
| Married but Separated | 1.1% | 1.4% | 1.8% |
| Single Population | 48.7% | 37.7% | 50.2% |
| Never Married | 26.6% | 23.6% | 33.8% |
| Divorced | 16.9% | 11.9% | 10.8% |
| Widowed | 5.1% | 2.3% | 5.6% |
| space5 | | | |
| Household Size | 2.95 | 2.69 | 2.60 |
| Households | 852 | 332 | 124,010,992 |
| Family Households | 584 | 248 | 80,755,759 |
| Married couple, w/children | 32.5% | 34.3% | 30.5% |
| Married couple, no children | 35.8% | 44.0% | 42.9% |
| Non Family Households | 268 | 84 | 43,255,233 |
| Single householder, w/children | 19.0% | 12.5% | 15.8% |
| Single householder, no children | 12.7% | 9.3% | 10.8% |