| | Mill City, OR | Lyons, OR | United States |
| Population | 1,904 | 1,247 | 329,725,481 |
| Female Population | 50.8% | 45.3% | 50.5% |
| Male Population | 49.2% | 54.7% | 49.5% |
| Median Age | 45.9 | 59.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,865 | 1,162 | 309,327,143 |
| Population - 2000 | 1,537 | 1,008 | 285,036,114 |
| Population - 1990 | 1,555 | 938 | 251,960,433 |
| Pop. 2000 to Now | 29.0% | 28.1% | 15.6% |
| Pop. 1990 to Now | 27.5% | 37.6% | 30.8% |
| space4 | | | |
| Population Density | 2,269.4 | 1,435.0 | 93.4 |
| Land Area | 0.8 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mill City, OR | Lyons, OR | United States |
| Age 0 to 4 | 5.9% | 2.6% | 5.9% |
| Age 5 to 9 | 5.7% | 3.4% | 6.1% |
| Age 10 to 14 | 2.7% | 3.7% | 6.6% |
| Age 15 to 17 | 7.9% | 0.9% | 3.9% |
| Age 18 to 20 | 2.6% | 2.2% | 4.0% |
| Age 21 to 24 | 3.0% | 2.2% | 5.2% |
| Age 25 to 34 | 12.0% | 7.7% | 13.8% |
| Age 35 to 44 | 9.2% | 6.6% | 12.9% |
| Age 45 to 54 | 13.4% | 11.6% | 12.6% |
| Age 55 to 59 | 8.7% | 10.6% | 6.7% |
| Age 60 to 64 | 9.0% | 13.3% | 6.3% |
| Age 65 to 74 | 8.4% | 30.2% | 9.6% |
| Age 75 to 84 | 10.0% | 5.1% | 4.5% |
| Age 85 and over | 1.4% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mill City, OR | Lyons, OR | United States |
| White | 81.3% | 79.7% | 59.4% |
| Black | 1.4% | 0.2% | 12.2% |
| Asian | 0.2% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 1.1% | 0.2% |
| Other | 2.8% | 2.5% | 0.4% |
| Two or More Races | 8.8% | 12.6% | 3.2% |
| Hispanic | 5.7% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mill City, OR | Lyons, OR | United States |
| Married Population | 49.8% | 66.5% | 49.8% |
| Currently Married | 46.0% | 65.1% | 48.0% |
| Married but Separated | 3.7% | 1.4% | 1.8% |
| Single Population | 50.2% | 33.5% | 50.2% |
| Never Married | 28.9% | 15.6% | 33.8% |
| Divorced | 13.4% | 12.7% | 10.8% |
| Widowed | 8.0% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 2.60 | 2.15 | 2.60 |
| Households | 731 | 580 | 124,010,992 |
| Family Households | 501 | 405 | 80,755,759 |
| Married couple, w/children | 24.2% | 16.3% | 30.5% |
| Married couple, no children | 46.9% | 74.1% | 42.9% |
| Non Family Households | 230 | 175 | 43,255,233 |
| Single householder, w/children | 19.2% | 2.7% | 15.8% |
| Single householder, no children | 9.8% | 6.9% | 10.8% |