| | Myrtle Creek, OR | Astoria, OR | United States |
| Population | 3,476 | 10,166 | 329,725,481 |
| Female Population | 52.2% | 51.8% | 50.5% |
| Male Population | 47.8% | 48.2% | 49.5% |
| Median Age | 40.4 | 41.8 | 38.4 |
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| Population - 2010 | 3,395 | 9,485 | 309,327,143 |
| Population - 2000 | 3,419 | 9,813 | 285,036,114 |
| Population - 1990 | 3,063 | 10,069 | 251,960,433 |
| Pop. 2000 to Now | 2.0% | 2.2% | 15.6% |
| Pop. 1990 to Now | 13.8% | -0.4% | 30.8% |
| space4 | | | |
| Population Density | 1,388.7 | 1,656.2 | 93.4 |
| Land Area | 2.5 | 6.1 | 3,531,905.4 |
| Water Area | 0.0 | 3.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Myrtle Creek, OR | Astoria, OR | United States |
| Age 0 to 4 | 7.4% | 6.3% | 5.9% |
| Age 5 to 9 | 7.5% | 4.9% | 6.1% |
| Age 10 to 14 | 5.4% | 5.3% | 6.6% |
| Age 15 to 17 | 2.8% | 2.9% | 3.9% |
| Age 18 to 20 | 1.5% | 3.7% | 4.0% |
| Age 21 to 24 | 1.2% | 2.4% | 5.2% |
| Age 25 to 34 | 15.9% | 15.3% | 13.8% |
| Age 35 to 44 | 14.3% | 14.6% | 12.9% |
| Age 45 to 54 | 10.9% | 8.9% | 12.6% |
| Age 55 to 59 | 5.6% | 10.0% | 6.7% |
| Age 60 to 64 | 9.4% | 7.0% | 6.3% |
| Age 65 to 74 | 12.0% | 12.9% | 9.6% |
| Age 75 to 84 | 3.8% | 3.6% | 4.5% |
| Age 85 and over | 2.2% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Myrtle Creek, OR | Astoria, OR | United States |
| White | 92.4% | 76.1% | 59.4% |
| Black | 0.5% | 1.2% | 12.2% |
| Asian | 0.8% | 0.7% | 5.6% |
| Native American | 0.5% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.6% | 7.1% | 3.2% |
| Hispanic | 4.3% | 14.5% | 18.4% |
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| Marriage & Family | | | |
| | Myrtle Creek, OR | Astoria, OR | United States |
| Married Population | 51.7% | 49.1% | 49.8% |
| Currently Married | 47.9% | 46.7% | 48.0% |
| Married but Separated | 3.8% | 2.4% | 1.8% |
| Single Population | 48.3% | 50.9% | 50.2% |
| Never Married | 27.5% | 29.3% | 33.8% |
| Divorced | 15.1% | 16.4% | 10.8% |
| Widowed | 5.7% | 5.2% | 5.6% |
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| Household Size | 2.89 | 2.23 | 2.60 |
| Households | 1,188 | 4,446 | 124,010,992 |
| Family Households | 927 | 2,371 | 80,755,759 |
| Married couple, w/children | 15.3% | 24.5% | 30.5% |
| Married couple, no children | 49.7% | 50.9% | 42.9% |
| Non Family Households | 261 | 2,075 | 43,255,233 |
| Single householder, w/children | 24.6% | 13.7% | 15.8% |
| Single householder, no children | 10.4% | 10.8% | 10.8% |