| | Watersmeet township, MI | Marble, MN | United States |
| Population | 1,060 | 550 | 329,725,481 |
| Female Population | 50.0% | 49.1% | 50.5% |
| Male Population | 50.0% | 50.9% | 49.5% |
| Median Age | 61 | 41.8 | 38.4 |
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| Population - 2010 | 1,420 | 700 | 309,327,143 |
| Population - 2000 | 1,472 | 695 | 285,036,114 |
| Population - 1990 | 1,048 | 618 | 251,960,433 |
| Pop. 2000 to Now | -8.1% | -3.0% | 15.6% |
| Pop. 1990 to Now | 29.1% | 9.1% | 30.8% |
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| Population Density | 4.2 | 127.8 | 93.4 |
| Land Area | 254.8 | 4.3 | 3,531,905.4 |
| Water Area | 23.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Watersmeet township, MI | Marble, MN | United States |
| Age 0 to 4 | 0.9% | 4.4% | 5.9% |
| Age 5 to 9 | 7.1% | 4.2% | 6.1% |
| Age 10 to 14 | 3.9% | 5.8% | 6.6% |
| Age 15 to 17 | 2.4% | 2.2% | 3.9% |
| Age 18 to 20 | 0.8% | 4.9% | 4.0% |
| Age 21 to 24 | 1.7% | 5.5% | 5.2% |
| Age 25 to 34 | 7.9% | 17.8% | 13.8% |
| Age 35 to 44 | 3.9% | 8.5% | 12.9% |
| Age 45 to 54 | 10.1% | 21.1% | 12.6% |
| Age 55 to 59 | 9.0% | 6.5% | 6.7% |
| Age 60 to 64 | 8.4% | 5.8% | 6.3% |
| Age 65 to 74 | 31.3% | 8.2% | 9.6% |
| Age 75 to 84 | 10.7% | 3.3% | 4.5% |
| Age 85 and over | 2.1% | 1.8% | 1.9% |
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| Race | | | |
| | Watersmeet township, MI | Marble, MN | United States |
| White | 72.8% | 87.8% | 59.4% |
| Black | 0.8% | 0.7% | 12.2% |
| Asian | 0.2% | 3.1% | 5.6% |
| Native American | 23.9% | 2.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 5.3% | 3.2% |
| Hispanic | 1.3% | 0.5% | 18.4% |
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| Marriage & Family | | | |
| | Watersmeet township, MI | Marble, MN | United States |
| Married Population | 58.9% | 41.8% | 49.8% |
| Currently Married | 58.9% | 40.6% | 48.0% |
| Married but Separated | 0.0% | 1.3% | 1.8% |
| Single Population | 41.1% | 58.2% | 50.2% |
| Never Married | 19.3% | 35.5% | 33.8% |
| Divorced | 14.8% | 16.8% | 10.8% |
| Widowed | 7.1% | 5.9% | 5.6% |
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| Household Size | 2.01 | 2.15 | 2.60 |
| Households | 526 | 253 | 124,010,992 |
| Family Households | 273 | 129 | 80,755,759 |
| Married couple, w/children | 11.4% | 24.8% | 30.5% |
| Married couple, no children | 75.5% | 50.4% | 42.9% |
| Non Family Households | 253 | 124 | 43,255,233 |
| Single householder, w/children | 12.1% | 19.4% | 15.8% |
| Single householder, no children | 1.1% | 5.4% | 10.8% |