| | Medical Lake, WA | Ozark, MO | United States |
| Population | 4,832 | 20,874 | 329,725,481 |
| Female Population | 48.0% | 52.7% | 50.5% |
| Male Population | 52.0% | 47.3% | 49.5% |
| Median Age | 36.7 | 33.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,064 | 17,938 | 309,327,143 |
| Population - 2000 | 3,758 | 9,665 | 285,036,114 |
| Population - 1990 | 3,664 | 4,243 | 251,960,433 |
| Pop. 2000 to Now | 31.6% | 117.8% | 15.6% |
| Pop. 1990 to Now | 34.9% | 396.2% | 30.8% |
| space4 | | | |
| Population Density | 1,433.4 | 1,864.4 | 93.4 |
| Land Area | 3.4 | 11.2 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Medical Lake, WA | Ozark, MO | United States |
| Age 0 to 4 | 3.5% | 6.7% | 5.9% |
| Age 5 to 9 | 4.9% | 8.6% | 6.1% |
| Age 10 to 14 | 7.7% | 10.4% | 6.6% |
| Age 15 to 17 | 7.1% | 3.6% | 3.9% |
| Age 18 to 20 | 4.5% | 3.5% | 4.0% |
| Age 21 to 24 | 3.2% | 5.1% | 5.2% |
| Age 25 to 34 | 18.4% | 14.1% | 13.8% |
| Age 35 to 44 | 17.7% | 14.7% | 12.9% |
| Age 45 to 54 | 9.5% | 10.9% | 12.6% |
| Age 55 to 59 | 9.3% | 5.5% | 6.7% |
| Age 60 to 64 | 5.0% | 4.1% | 6.3% |
| Age 65 to 74 | 4.6% | 7.9% | 9.6% |
| Age 75 to 84 | 3.4% | 3.8% | 4.5% |
| Age 85 and over | 1.2% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Medical Lake, WA | Ozark, MO | United States |
| White | 86.5% | 90.9% | 59.4% |
| Black | 3.2% | 1.4% | 12.2% |
| Asian | 1.6% | 0.3% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 1.9% | 0.1% | 0.4% |
| Two or More Races | 2.8% | 3.1% | 3.2% |
| Hispanic | 3.9% | 4.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Medical Lake, WA | Ozark, MO | United States |
| Married Population | 58.4% | 57.8% | 49.8% |
| Currently Married | 55.2% | 54.0% | 48.0% |
| Married but Separated | 3.3% | 3.8% | 1.8% |
| Single Population | 41.6% | 42.2% | 50.2% |
| Never Married | 31.9% | 25.6% | 33.8% |
| Divorced | 8.3% | 11.4% | 10.8% |
| Widowed | 1.4% | 5.1% | 5.6% |
| space5 | | | |
| Household Size | 2.60 | 2.61 | 2.60 |
| Households | 1,688 | 7,893 | 124,010,992 |
| Family Households | 1,298 | 5,242 | 80,755,759 |
| Married couple, w/children | 33.1% | 44.2% | 30.5% |
| Married couple, no children | 50.2% | 32.2% | 42.9% |
| Non Family Households | 390 | 2,651 | 43,255,233 |
| Single householder, w/children | 14.6% | 21.3% | 15.8% |
| Single householder, no children | 2.2% | 2.4% | 10.8% |