| | Tucson Estates, AZ | Darby, MT | United States |
| Population | 12,411 | 609 | 329,725,481 |
| Female Population | 51.5% | 45.8% | 50.5% |
| Male Population | 48.5% | 54.2% | 49.5% |
| Median Age | 53.1 | 52.8 | 38.4 |
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| Population - 2010 | 12,106 | 721 | 309,327,143 |
| Population - 2000 | 9,755 | 710 | 285,036,114 |
| Population - 1990 | 2,662 | 625 | 251,960,433 |
| Pop. 2000 to Now | 29.8% | 16.2% | 15.6% |
| Pop. 1990 to Now | 375.7% | 32.0% | 30.8% |
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| Population Density | 955.1 | 998.4 | 93.4 |
| Land Area | 13.0 | 0.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Tucson Estates, AZ | Darby, MT | United States |
| Age 0 to 4 | 2.9% | 1.5% | 5.9% |
| Age 5 to 9 | 2.9% | 2.6% | 6.1% |
| Age 10 to 14 | 7.7% | 3.0% | 6.6% |
| Age 15 to 17 | 2.7% | 2.6% | 3.9% |
| Age 18 to 20 | 5.0% | 1.5% | 4.0% |
| Age 21 to 24 | 3.4% | 3.3% | 5.2% |
| Age 25 to 34 | 6.6% | 19.2% | 13.8% |
| Age 35 to 44 | 8.2% | 9.0% | 12.9% |
| Age 45 to 54 | 14.5% | 14.0% | 12.6% |
| Age 55 to 59 | 4.2% | 8.9% | 6.7% |
| Age 60 to 64 | 7.5% | 12.8% | 6.3% |
| Age 65 to 74 | 17.5% | 16.9% | 9.6% |
| Age 75 to 84 | 12.9% | 4.6% | 4.5% |
| Age 85 and over | 4.0% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Tucson Estates, AZ | Darby, MT | United States |
| White | 57.8% | 86.4% | 59.4% |
| Black | 1.8% | 0.2% | 12.2% |
| Asian | 0.5% | 7.6% | 5.6% |
| Native American | 1.5% | 1.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 3.3% | 3.2% |
| Hispanic | 37.5% | 1.1% | 18.4% |
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| Marriage & Family | | | |
| | Tucson Estates, AZ | Darby, MT | United States |
| Married Population | 58.5% | 45.6% | 49.8% |
| Currently Married | 57.2% | 42.9% | 48.0% |
| Married but Separated | 1.3% | 2.7% | 1.8% |
| Single Population | 41.5% | 54.4% | 50.2% |
| Never Married | 22.6% | 26.7% | 33.8% |
| Divorced | 11.1% | 23.7% | 10.8% |
| Widowed | 7.8% | 4.1% | 5.6% |
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| Household Size | 2.37 | 1.88 | 2.60 |
| Households | 5,222 | 321 | 124,010,992 |
| Family Households | 3,571 | 164 | 80,755,759 |
| Married couple, w/children | 16.3% | 1.2% | 30.5% |
| Married couple, no children | 64.2% | 68.3% | 42.9% |
| Non Family Households | 1,651 | 157 | 43,255,233 |
| Single householder, w/children | 12.8% | 17.7% | 15.8% |
| Single householder, no children | 6.7% | 12.8% | 10.8% |