| | Elkton, OR | Picture Rocks, AZ | United States |
| Population | 140 | 9,084 | 329,725,481 |
| Female Population | 54.3% | 47.5% | 50.5% |
| Male Population | 45.7% | 52.5% | 49.5% |
| Median Age | 70.3 | 50.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 192 | 8,380 | 309,327,143 |
| Population - 2000 | 147 | 8,139 | 285,036,114 |
| Population - 1990 | 172 | 4,026 | 251,960,433 |
| Pop. 2000 to Now | 34.7% | 11.9% | 15.6% |
| Pop. 1990 to Now | 15.1% | 126.3% | 30.8% |
| space4 | | | |
| Population Density | 608.7 | 128.2 | 93.4 |
| Land Area | 0.2 | 70.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Elkton, OR | Picture Rocks, AZ | United States |
| Age 0 to 4 | 0.0% | 4.1% | 5.9% |
| Age 5 to 9 | 1.4% | 4.9% | 6.1% |
| Age 10 to 14 | 0.0% | 5.8% | 6.6% |
| Age 15 to 17 | 0.0% | 5.0% | 3.9% |
| Age 18 to 20 | 0.0% | 1.3% | 4.0% |
| Age 21 to 24 | 0.0% | 3.6% | 5.2% |
| Age 25 to 34 | 3.6% | 11.0% | 13.8% |
| Age 35 to 44 | 8.6% | 7.6% | 12.9% |
| Age 45 to 54 | 12.1% | 11.1% | 12.6% |
| Age 55 to 59 | 5.0% | 10.1% | 6.7% |
| Age 60 to 64 | 3.6% | 11.5% | 6.3% |
| Age 65 to 74 | 32.1% | 14.0% | 9.6% |
| Age 75 to 84 | 25.0% | 8.2% | 4.5% |
| Age 85 and over | 8.6% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Elkton, OR | Picture Rocks, AZ | United States |
| White | 90.7% | 73.9% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.0% | 0.3% | 5.6% |
| Native American | 4.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.0% | 1.3% | 3.2% |
| Hispanic | 0.0% | 24.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Elkton, OR | Picture Rocks, AZ | United States |
| Married Population | 71.7% | 60.7% | 49.8% |
| Currently Married | 71.7% | 59.2% | 48.0% |
| Married but Separated | 0.0% | 1.5% | 1.8% |
| Single Population | 28.3% | 39.3% | 50.2% |
| Never Married | 7.2% | 22.6% | 33.8% |
| Divorced | 11.6% | 13.0% | 10.8% |
| Widowed | 9.4% | 3.6% | 5.6% |
| space5 | | | |
| Household Size | 1.67 | 2.55 | 2.60 |
| Households | 84 | 3,565 | 124,010,992 |
| Family Households | 46 | 2,580 | 80,755,759 |
| Married couple, w/children | 4.3% | 25.4% | 30.5% |
| Married couple, no children | 95.7% | 57.7% | 42.9% |
| Non Family Households | 38 | 985 | 43,255,233 |
| Single householder, w/children | 0.0% | 8.8% | 15.8% |
| Single householder, no children | 0.0% | 8.0% | 10.8% |