| | Dillard, OR | Tri-City, OR | United States |
| Population | 304 | 4,009 | 329,725,481 |
| Female Population | 64.8% | 42.9% | 50.5% |
| Male Population | 35.2% | 57.1% | 49.5% |
| Median Age | 61.5 | 50.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 358 | 3,954 | 309,327,143 |
| Population - 2000 | 335 | 3,519 | 285,036,114 |
| Population - 1990 | 289 | 3,585 | 251,960,433 |
| Pop. 2000 to Now | 86.3% | 16.9% | 15.6% |
| Pop. 1990 to Now | 115.9% | 14.7% | 30.8% |
| space4 | | | |
| Population Density | 257.9 | 554.3 | 93.4 |
| Land Area | 1.2 | 7.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dillard, OR | Tri-City, OR | United States |
| Age 0 to 4 | 0.0% | 3.7% | 5.9% |
| Age 5 to 9 | 0.0% | 4.5% | 6.1% |
| Age 10 to 14 | 0.0% | 4.4% | 6.6% |
| Age 15 to 17 | 0.0% | 3.3% | 3.9% |
| Age 18 to 20 | 0.0% | 1.1% | 4.0% |
| Age 21 to 24 | 0.0% | 1.9% | 5.2% |
| Age 25 to 34 | 0.0% | 12.5% | 13.8% |
| Age 35 to 44 | 22.7% | 9.6% | 12.9% |
| Age 45 to 54 | 19.4% | 12.9% | 12.6% |
| Age 55 to 59 | 0.0% | 7.7% | 6.7% |
| Age 60 to 64 | 17.1% | 10.3% | 6.3% |
| Age 65 to 74 | 35.2% | 19.6% | 9.6% |
| Age 75 to 84 | 5.6% | 6.7% | 4.5% |
| Age 85 and over | 0.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dillard, OR | Tri-City, OR | United States |
| White | 100.0% | 86.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 3.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.5% | 0.2% |
| Other | 0.0% | 2.1% | 0.4% |
| Two or More Races | 0.0% | 2.3% | 3.2% |
| Hispanic | 0.0% | 5.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dillard, OR | Tri-City, OR | United States |
| Married Population | 94.4% | 46.0% | 49.8% |
| Currently Married | 71.7% | 43.4% | 48.0% |
| Married but Separated | 22.7% | 2.6% | 1.8% |
| Single Population | 5.6% | 54.0% | 50.2% |
| Never Married | 0.0% | 26.8% | 33.8% |
| Divorced | 0.0% | 15.1% | 10.8% |
| Widowed | 5.6% | 12.1% | 5.6% |
| space5 | | | |
| Household Size | 2.38 | 2.33 | 2.60 |
| Households | 128 | 1,718 | 124,010,992 |
| Family Households | 111 | 920 | 80,755,759 |
| Married couple, w/children | 0.0% | 12.6% | 30.5% |
| Married couple, no children | 100.0% | 61.6% | 42.9% |
| Non Family Households | 17 | 798 | 43,255,233 |
| Single householder, w/children | 0.0% | 15.1% | 15.8% |
| Single householder, no children | 0.0% | 10.7% | 10.8% |