| | Aubrey, TX | Washington, IA | United States |
| Population | 5,229 | 7,314 | 329,725,481 |
| Female Population | 55.1% | 55.0% | 50.5% |
| Male Population | 44.9% | 45.1% | 49.5% |
| Median Age | 35.5 | 40.4 | 38.4 |
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| Population - 2010 | 2,627 | 7,262 | 309,327,143 |
| Population - 2000 | 1,500 | 7,047 | 285,036,114 |
| Population - 1990 | 1,138 | 7,074 | 251,960,433 |
| Pop. 2000 to Now | 328.9% | 2.3% | 15.6% |
| Pop. 1990 to Now | 465.3% | 1.9% | 30.8% |
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| Population Density | 1,723.5 | 1,394.7 | 93.4 |
| Land Area | 3.0 | 5.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Aubrey, TX | Washington, IA | United States |
| Age 0 to 4 | 8.3% | 6.1% | 5.9% |
| Age 5 to 9 | 12.4% | 6.0% | 6.1% |
| Age 10 to 14 | 5.1% | 6.5% | 6.6% |
| Age 15 to 17 | 1.5% | 3.4% | 3.9% |
| Age 18 to 20 | 3.2% | 2.6% | 4.0% |
| Age 21 to 24 | 2.8% | 5.8% | 5.2% |
| Age 25 to 34 | 15.8% | 14.7% | 13.8% |
| Age 35 to 44 | 16.2% | 10.1% | 12.9% |
| Age 45 to 54 | 13.6% | 11.4% | 12.6% |
| Age 55 to 59 | 5.9% | 6.5% | 6.7% |
| Age 60 to 64 | 5.6% | 5.5% | 6.3% |
| Age 65 to 74 | 7.5% | 12.2% | 9.6% |
| Age 75 to 84 | 1.1% | 5.9% | 4.5% |
| Age 85 and over | 0.9% | 3.3% | 1.9% |
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| Race | | | |
| | Aubrey, TX | Washington, IA | United States |
| White | 71.2% | 85.9% | 59.4% |
| Black | 7.9% | 1.7% | 12.2% |
| Asian | 2.3% | 1.0% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 10.7% | 2.3% | 3.2% |
| Hispanic | 7.4% | 9.1% | 18.4% |
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| Marriage & Family | | | |
| | Aubrey, TX | Washington, IA | United States |
| Married Population | 57.6% | 47.4% | 49.8% |
| Currently Married | 55.7% | 45.8% | 48.0% |
| Married but Separated | 1.9% | 1.6% | 1.8% |
| Single Population | 42.4% | 52.6% | 50.2% |
| Never Married | 16.8% | 29.8% | 33.8% |
| Divorced | 17.0% | 15.3% | 10.8% |
| Widowed | 8.6% | 7.5% | 5.6% |
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| Household Size | 2.63 | 2.30 | 2.60 |
| Households | 1,988 | 3,092 | 124,010,992 |
| Family Households | 1,296 | 1,854 | 80,755,759 |
| Married couple, w/children | 33.5% | 23.2% | 30.5% |
| Married couple, no children | 42.1% | 43.3% | 42.9% |
| Non Family Households | 692 | 1,238 | 43,255,233 |
| Single householder, w/children | 19.3% | 22.3% | 15.8% |
| Single householder, no children | 5.1% | 11.2% | 10.8% |