| | Amboy, MN | Mapleton, MN | United States |
| Population | 555 | 1,668 | 329,725,481 |
| Female Population | 56.8% | 51.6% | 50.5% |
| Male Population | 43.2% | 48.4% | 49.5% |
| Median Age | 43.4 | 37.2 | 38.4 |
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| Population - 2010 | 535 | 1,747 | 309,327,143 |
| Population - 2000 | 575 | 1,678 | 285,036,114 |
| Population - 1990 | 517 | 1,526 | 251,960,433 |
| Pop. 2000 to Now | -12.2% | 0.2% | 15.6% |
| Pop. 1990 to Now | -2.3% | 10.2% | 30.8% |
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| Population Density | 1,761.9 | 1,148.8 | 93.4 |
| Land Area | 0.3 | 1.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Amboy, MN | Mapleton, MN | United States |
| Age 0 to 4 | 5.4% | 6.5% | 5.9% |
| Age 5 to 9 | 7.9% | 9.6% | 6.1% |
| Age 10 to 14 | 7.0% | 8.0% | 6.6% |
| Age 15 to 17 | 3.6% | 4.9% | 3.9% |
| Age 18 to 20 | 0.9% | 1.1% | 4.0% |
| Age 21 to 24 | 2.2% | 3.0% | 5.2% |
| Age 25 to 34 | 10.3% | 12.4% | 13.8% |
| Age 35 to 44 | 14.6% | 17.3% | 12.9% |
| Age 45 to 54 | 13.2% | 8.6% | 12.6% |
| Age 55 to 59 | 3.6% | 6.0% | 6.7% |
| Age 60 to 64 | 5.6% | 7.0% | 6.3% |
| Age 65 to 74 | 11.2% | 8.0% | 9.6% |
| Age 75 to 84 | 13.2% | 3.2% | 4.5% |
| Age 85 and over | 1.4% | 4.6% | 1.9% |
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| Race | | | |
| | Amboy, MN | Mapleton, MN | United States |
| White | 94.8% | 89.6% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 2.5% | 3.2% |
| Hispanic | 4.5% | 6.7% | 18.4% |
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| Marriage & Family | | | |
| | Amboy, MN | Mapleton, MN | United States |
| Married Population | 49.5% | 57.3% | 49.8% |
| Currently Married | 49.5% | 57.1% | 48.0% |
| Married but Separated | 0.0% | 0.2% | 1.8% |
| Single Population | 50.5% | 42.7% | 50.2% |
| Never Married | 23.5% | 26.4% | 33.8% |
| Divorced | 19.9% | 10.3% | 10.8% |
| Widowed | 7.0% | 5.9% | 5.6% |
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| Household Size | 2.12 | 2.53 | 2.60 |
| Households | 262 | 638 | 124,010,992 |
| Family Households | 134 | 462 | 80,755,759 |
| Married couple, w/children | 32.1% | 33.6% | 30.5% |
| Married couple, no children | 47.8% | 41.3% | 42.9% |
| Non Family Households | 128 | 176 | 43,255,233 |
| Single householder, w/children | 14.9% | 18.6% | 15.8% |
| Single householder, no children | 5.2% | 6.5% | 10.8% |