| | Merriam Woods, MO | Williams, AZ | United States |
| Population | 2,133 | 3,235 | 329,725,481 |
| Female Population | 49.7% | 47.2% | 50.5% |
| Male Population | 50.3% | 52.8% | 49.5% |
| Median Age | 34.2 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,754 | 3,047 | 309,327,143 |
| Population - 2000 | 1,142 | 2,842 | 285,036,114 |
| Population - 1990 | 601 | 2,532 | 251,960,433 |
| Pop. 2000 to Now | 62.8% | 16.8% | 15.6% |
| Pop. 1990 to Now | 209.3% | 31.1% | 30.8% |
| space4 | | | |
| Population Density | 1,409.8 | 73.8 | 93.4 |
| Land Area | 1.5 | 43.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Merriam Woods, MO | Williams, AZ | United States |
| Age 0 to 4 | 10.4% | 9.1% | 5.9% |
| Age 5 to 9 | 8.8% | 5.0% | 6.1% |
| Age 10 to 14 | 6.3% | 7.1% | 6.6% |
| Age 15 to 17 | 5.7% | 4.7% | 3.9% |
| Age 18 to 20 | 3.6% | 2.4% | 4.0% |
| Age 21 to 24 | 4.1% | 6.3% | 5.2% |
| Age 25 to 34 | 12.0% | 11.1% | 13.8% |
| Age 35 to 44 | 14.6% | 9.3% | 12.9% |
| Age 45 to 54 | 13.8% | 11.0% | 12.6% |
| Age 55 to 59 | 6.2% | 8.1% | 6.7% |
| Age 60 to 64 | 4.5% | 8.0% | 6.3% |
| Age 65 to 74 | 7.6% | 12.4% | 9.6% |
| Age 75 to 84 | 1.9% | 4.9% | 4.5% |
| Age 85 and over | 0.5% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Merriam Woods, MO | Williams, AZ | United States |
| White | 84.7% | 51.4% | 59.4% |
| Black | 0.0% | 3.6% | 12.2% |
| Asian | 0.4% | 1.2% | 5.6% |
| Native American | 0.0% | 3.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 3.0% | 0.4% |
| Two or More Races | 2.8% | 4.0% | 3.2% |
| Hispanic | 12.1% | 33.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Merriam Woods, MO | Williams, AZ | United States |
| Married Population | 51.2% | 53.0% | 49.8% |
| Currently Married | 48.7% | 51.0% | 48.0% |
| Married but Separated | 2.5% | 2.0% | 1.8% |
| Single Population | 48.8% | 47.0% | 50.2% |
| Never Married | 28.1% | 31.6% | 33.8% |
| Divorced | 18.7% | 10.9% | 10.8% |
| Widowed | 2.0% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 3.23 | 2.48 | 2.60 |
| Households | 661 | 1,302 | 124,010,992 |
| Family Households | 474 | 891 | 80,755,759 |
| Married couple, w/children | 26.6% | 23.0% | 30.5% |
| Married couple, no children | 36.1% | 45.1% | 42.9% |
| Non Family Households | 187 | 411 | 43,255,233 |
| Single householder, w/children | 29.5% | 24.2% | 15.8% |
| Single householder, no children | 7.8% | 7.6% | 10.8% |