| | Hampton, IA | Alden, IA | United States |
| Population | 4,327 | 882 | 329,725,481 |
| Female Population | 54.0% | 47.9% | 50.5% |
| Male Population | 46.0% | 52.2% | 49.5% |
| Median Age | 43.1 | 41.3 | 38.4 |
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| Population - 2010 | 4,475 | 785 | 309,327,143 |
| Population - 2000 | 4,218 | 904 | 285,036,114 |
| Population - 1990 | 4,133 | 855 | 251,960,433 |
| Pop. 2000 to Now | -1.3% | -19.7% | 15.6% |
| Pop. 1990 to Now | 0.7% | -15.1% | 30.8% |
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| Population Density | 977.0 | 567.2 | 93.4 |
| Land Area | 4.4 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hampton, IA | Alden, IA | United States |
| Age 0 to 4 | 5.4% | 4.1% | 5.9% |
| Age 5 to 9 | 6.0% | 8.3% | 6.1% |
| Age 10 to 14 | 11.1% | 9.5% | 6.6% |
| Age 15 to 17 | 4.8% | 2.0% | 3.9% |
| Age 18 to 20 | 5.6% | 2.8% | 4.0% |
| Age 21 to 24 | 0.6% | 0.9% | 5.2% |
| Age 25 to 34 | 9.7% | 12.1% | 13.8% |
| Age 35 to 44 | 9.3% | 13.3% | 12.9% |
| Age 45 to 54 | 12.8% | 15.5% | 12.6% |
| Age 55 to 59 | 7.0% | 6.9% | 6.7% |
| Age 60 to 64 | 7.0% | 5.9% | 6.3% |
| Age 65 to 74 | 10.0% | 12.5% | 9.6% |
| Age 75 to 84 | 6.9% | 5.1% | 4.5% |
| Age 85 and over | 3.8% | 1.0% | 1.9% |
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| Race | | | |
| | Hampton, IA | Alden, IA | United States |
| White | 76.0% | 85.6% | 59.4% |
| Black | 0.8% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.8% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.1% | 0.0% | 3.2% |
| Hispanic | 23.1% | 13.6% | 18.4% |
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| Marriage & Family | | | |
| | Hampton, IA | Alden, IA | United States |
| Married Population | 54.4% | 47.5% | 49.8% |
| Currently Married | 52.5% | 46.2% | 48.0% |
| Married but Separated | 1.9% | 1.3% | 1.8% |
| Single Population | 45.6% | 52.5% | 50.2% |
| Never Married | 28.1% | 36.6% | 33.8% |
| Divorced | 13.4% | 8.0% | 10.8% |
| Widowed | 4.1% | 8.0% | 5.6% |
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| Household Size | 2.46 | 2.36 | 2.60 |
| Households | 1,711 | 374 | 124,010,992 |
| Family Households | 1,090 | 196 | 80,755,759 |
| Married couple, w/children | 26.5% | 39.3% | 30.5% |
| Married couple, no children | 51.3% | 41.3% | 42.9% |
| Non Family Households | 621 | 178 | 43,255,233 |
| Single householder, w/children | 21.6% | 10.7% | 15.8% |
| Single householder, no children | 0.6% | 8.7% | 10.8% |