| | Webster, SD | Alexandria, MN | United States |
| Population | 1,772 | 14,030 | 329,725,481 |
| Female Population | 49.7% | 50.9% | 50.5% |
| Male Population | 50.3% | 49.1% | 49.5% |
| Median Age | 42.9 | 37.5 | 38.4 |
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| Population - 2010 | 1,892 | 12,502 | 309,327,143 |
| Population - 2000 | 1,952 | 8,820 | 285,036,114 |
| Population - 1990 | 2,017 | 7,838 | 251,960,433 |
| Pop. 2000 to Now | -13.2% | 57.4% | 15.6% |
| Pop. 1990 to Now | -16.0% | 77.2% | 30.8% |
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| Population Density | 1,092.5 | 815.3 | 93.4 |
| Land Area | 1.6 | 17.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.7 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Webster, SD | Alexandria, MN | United States |
| Age 0 to 4 | 5.1% | 5.3% | 5.9% |
| Age 5 to 9 | 5.0% | 6.2% | 6.1% |
| Age 10 to 14 | 7.0% | 6.2% | 6.6% |
| Age 15 to 17 | 2.1% | 2.6% | 3.9% |
| Age 18 to 20 | 5.5% | 4.9% | 4.0% |
| Age 21 to 24 | 3.2% | 6.3% | 5.2% |
| Age 25 to 34 | 12.5% | 14.8% | 13.8% |
| Age 35 to 44 | 10.2% | 10.0% | 12.9% |
| Age 45 to 54 | 10.4% | 10.1% | 12.6% |
| Age 55 to 59 | 6.8% | 6.2% | 6.7% |
| Age 60 to 64 | 6.0% | 6.2% | 6.3% |
| Age 65 to 74 | 10.3% | 8.1% | 9.6% |
| Age 75 to 84 | 8.0% | 7.5% | 4.5% |
| Age 85 and over | 7.9% | 5.5% | 1.9% |
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| Race | | | |
| | Webster, SD | Alexandria, MN | United States |
| White | 95.3% | 91.0% | 59.4% |
| Black | 0.0% | 0.2% | 12.2% |
| Asian | 0.1% | 0.8% | 5.6% |
| Native American | 1.4% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.7% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 3.0% | 3.2% |
| Hispanic | 3.2% | 4.1% | 18.4% |
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| Marriage & Family | | | |
| | Webster, SD | Alexandria, MN | United States |
| Married Population | 43.2% | 47.1% | 49.8% |
| Currently Married | 41.6% | 46.1% | 48.0% |
| Married but Separated | 1.6% | 1.0% | 1.8% |
| Single Population | 56.8% | 52.9% | 50.2% |
| Never Married | 26.1% | 32.1% | 33.8% |
| Divorced | 13.8% | 12.2% | 10.8% |
| Widowed | 16.8% | 8.5% | 5.6% |
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| Household Size | 2.12 | 2.00 | 2.60 |
| Households | 807 | 6,786 | 124,010,992 |
| Family Households | 379 | 3,562 | 80,755,759 |
| Married couple, w/children | 24.5% | 24.3% | 30.5% |
| Married couple, no children | 48.0% | 47.4% | 42.9% |
| Non Family Households | 428 | 3,224 | 43,255,233 |
| Single householder, w/children | 18.2% | 19.3% | 15.8% |
| Single householder, no children | 9.2% | 9.1% | 10.8% |