| | Buchanan Dam, TX | Anchorage, AK | United States |
| Population | 1,344 | 292,545 | 329,725,481 |
| Female Population | 43.8% | 48.9% | 50.5% |
| Male Population | 56.3% | 51.2% | 49.5% |
| Median Age | 62.1 | 34.3 | 38.4 |
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| Population - 2010 | 1,397 | 293,760 | 309,327,143 |
| Population - 2000 | 1,688 | 260,283 | 285,036,114 |
| Population - 1990 | 1,099 | 226,338 | 251,960,433 |
| Pop. 2000 to Now | -5.2% | 10.3% | 15.6% |
| Pop. 1990 to Now | 45.7% | 26.8% | 30.8% |
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| Population Density | 173.5 | 171.4 | 93.4 |
| Land Area | 7.7 | 1,706.4 | 3,531,905.4 |
| Water Area | 12.5 | 237.6 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Buchanan Dam, TX | Anchorage, AK | United States |
| Age 0 to 4 | 5.9% | 6.9% | 5.9% |
| Age 5 to 9 | 3.1% | 7.1% | 6.1% |
| Age 10 to 14 | 3.5% | 6.4% | 6.6% |
| Age 15 to 17 | 1.0% | 3.9% | 3.9% |
| Age 18 to 20 | 0.0% | 3.7% | 4.0% |
| Age 21 to 24 | 2.1% | 5.9% | 5.2% |
| Age 25 to 34 | 8.7% | 17.0% | 13.8% |
| Age 35 to 44 | 6.1% | 13.5% | 12.9% |
| Age 45 to 54 | 9.7% | 12.1% | 12.6% |
| Age 55 to 59 | 6.7% | 6.0% | 6.7% |
| Age 60 to 64 | 8.9% | 6.0% | 6.3% |
| Age 65 to 74 | 28.9% | 7.6% | 9.6% |
| Age 75 to 84 | 15.3% | 2.9% | 4.5% |
| Age 85 and over | 0.0% | 0.9% | 1.9% |
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| Race | | | |
| | Buchanan Dam, TX | Anchorage, AK | United States |
| White | 83.6% | 56.1% | 59.4% |
| Black | 0.0% | 5.2% | 12.2% |
| Asian | 0.5% | 9.5% | 5.6% |
| Native American | 0.8% | 6.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 2.9% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 4.5% | 9.4% | 3.2% |
| Hispanic | 10.6% | 9.5% | 18.4% |
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| Marriage & Family | | | |
| | Buchanan Dam, TX | Anchorage, AK | United States |
| Married Population | 71.4% | 50.8% | 49.8% |
| Currently Married | 71.0% | 48.9% | 48.0% |
| Married but Separated | 0.3% | 1.9% | 1.8% |
| Single Population | 28.6% | 49.2% | 50.2% |
| Never Married | 7.5% | 33.6% | 33.8% |
| Divorced | 14.7% | 12.0% | 10.8% |
| Widowed | 6.5% | 3.6% | 5.6% |
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| Household Size | 2.10 | 2.68 | 2.60 |
| Households | 641 | 106,695 | 124,010,992 |
| Family Households | 444 | 69,003 | 80,755,759 |
| Married couple, w/children | 11.7% | 35.7% | 30.5% |
| Married couple, no children | 84.2% | 39.8% | 42.9% |
| Non Family Households | 197 | 37,692 | 43,255,233 |
| Single householder, w/children | 2.0% | 15.9% | 15.8% |
| Single householder, no children | 2.0% | 8.5% | 10.8% |