| | McMillin, WA | Lexington, MA | United States |
| Population | 1,077 | 34,235 | 329,725,481 |
| Female Population | 54.1% | 51.3% | 50.5% |
| Male Population | 45.9% | 48.7% | 49.5% |
| Median Age | 54 | 46.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,924 | 31,512 | 309,327,143 |
| Population - 2000 | 978 | 30,355 | 285,036,114 |
| Population - 1990 | 639 | 28,974 | 251,960,433 |
| Pop. 2000 to Now | 85.2% | 8.7% | 15.6% |
| Pop. 1990 to Now | 183.4% | 13.9% | 30.8% |
| space4 | | | |
| Population Density | 651.5 | 2,083.2 | 93.4 |
| Land Area | 1.7 | 16.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | McMillin, WA | Lexington, MA | United States |
| Age 0 to 4 | 1.9% | 3.2% | 5.9% |
| Age 5 to 9 | 4.3% | 6.6% | 6.1% |
| Age 10 to 14 | 0.7% | 10.5% | 6.6% |
| Age 15 to 17 | 3.8% | 6.6% | 3.9% |
| Age 18 to 20 | 1.7% | 2.4% | 4.0% |
| Age 21 to 24 | 3.3% | 2.4% | 5.2% |
| Age 25 to 34 | 4.6% | 3.6% | 13.8% |
| Age 35 to 44 | 14.4% | 11.4% | 12.9% |
| Age 45 to 54 | 16.7% | 19.9% | 12.6% |
| Age 55 to 59 | 5.4% | 7.7% | 6.7% |
| Age 60 to 64 | 12.5% | 5.0% | 6.3% |
| Age 65 to 74 | 19.2% | 12.3% | 9.6% |
| Age 75 to 84 | 11.5% | 5.6% | 4.5% |
| Age 85 and over | 0.0% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | McMillin, WA | Lexington, MA | United States |
| White | 84.2% | 60.1% | 59.4% |
| Black | 0.0% | 1.1% | 12.2% |
| Asian | 2.5% | 31.8% | 5.6% |
| Native American | 4.4% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 1.5% | 4.1% | 3.2% |
| Hispanic | 7.3% | 2.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | McMillin, WA | Lexington, MA | United States |
| Married Population | 50.1% | 68.7% | 49.8% |
| Currently Married | 50.1% | 67.9% | 48.0% |
| Married but Separated | 0.0% | 0.8% | 1.8% |
| Single Population | 50.0% | 31.3% | 50.2% |
| Never Married | 21.5% | 21.3% | 33.8% |
| Divorced | 18.2% | 5.7% | 10.8% |
| Widowed | 10.2% | 4.3% | 5.6% |
| space5 | | | |
| Household Size | 2.12 | 2.75 | 2.60 |
| Households | 507 | 12,301 | 124,010,992 |
| Family Households | 305 | 9,753 | 80,755,759 |
| Married couple, w/children | 23.9% | 47.9% | 30.5% |
| Married couple, no children | 47.9% | 41.7% | 42.9% |
| Non Family Households | 202 | 2,548 | 43,255,233 |
| Single householder, w/children | 2.6% | 7.2% | 15.8% |
| Single householder, no children | 25.6% | 3.2% | 10.8% |