| | Cumberland, WI | River Falls, WI | United States |
| Population | 2,494 | 16,058 | 329,725,481 |
| Female Population | 49.6% | 53.2% | 50.5% |
| Male Population | 50.4% | 46.8% | 49.5% |
| Median Age | 39.2 | 26.8 | 38.4 |
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| Population - 2010 | 2,169 | 15,041 | 309,327,143 |
| Population - 2000 | 2,280 | 12,560 | 285,036,114 |
| Population - 1990 | 2,163 | 10,610 | 251,960,433 |
| Pop. 2000 to Now | -8.0% | 29.8% | 15.6% |
| Pop. 1990 to Now | -3.1% | 53.7% | 30.8% |
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| Population Density | 685.2 | 2,300.9 | 93.4 |
| Land Area | 3.6 | 7.0 | 3,531,905.4 |
| Water Area | 0.5 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Cumberland, WI | River Falls, WI | United States |
| Age 0 to 4 | 9.2% | 3.6% | 5.9% |
| Age 5 to 9 | 5.9% | 4.6% | 6.1% |
| Age 10 to 14 | 6.7% | 6.5% | 6.6% |
| Age 15 to 17 | 3.2% | 2.2% | 3.9% |
| Age 18 to 20 | 4.7% | 15.9% | 4.0% |
| Age 21 to 24 | 5.8% | 15.5% | 5.2% |
| Age 25 to 34 | 10.3% | 12.3% | 13.8% |
| Age 35 to 44 | 11.7% | 10.9% | 12.9% |
| Age 45 to 54 | 6.8% | 8.8% | 12.6% |
| Age 55 to 59 | 6.8% | 4.1% | 6.7% |
| Age 60 to 64 | 6.2% | 4.6% | 6.3% |
| Age 65 to 74 | 12.0% | 6.9% | 9.6% |
| Age 75 to 84 | 8.5% | 2.6% | 4.5% |
| Age 85 and over | 2.1% | 1.5% | 1.9% |
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| Race | | | |
| | Cumberland, WI | River Falls, WI | United States |
| White | 82.7% | 90.9% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.0% | 2.2% | 5.6% |
| Native American | 0.2% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 7.6% | 2.5% | 3.2% |
| Hispanic | 9.2% | 2.9% | 18.4% |
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| Marriage & Family | | | |
| | Cumberland, WI | River Falls, WI | United States |
| Married Population | 40.4% | 35.2% | 49.8% |
| Currently Married | 40.1% | 34.9% | 48.0% |
| Married but Separated | 0.3% | 0.3% | 1.8% |
| Single Population | 59.6% | 64.8% | 50.2% |
| Never Married | 27.9% | 53.2% | 33.8% |
| Divorced | 21.3% | 8.3% | 10.8% |
| Widowed | 10.4% | 3.3% | 5.6% |
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| Household Size | 2.46 | 2.45 | 2.60 |
| Households | 993 | 5,537 | 124,010,992 |
| Family Households | 526 | 3,005 | 80,755,759 |
| Married couple, w/children | 25.7% | 34.1% | 30.5% |
| Married couple, no children | 39.7% | 42.7% | 42.9% |
| Non Family Households | 467 | 2,532 | 43,255,233 |
| Single householder, w/children | 28.1% | 13.3% | 15.8% |
| Single householder, no children | 6.5% | 9.9% | 10.8% |