| | Cass Lake, MN | Waukee, IA | United States |
| Population | 558 | 23,441 | 329,725,481 |
| Female Population | 50.4% | 52.4% | 50.5% |
| Male Population | 49.6% | 47.6% | 49.5% |
| Median Age | 33.9 | 34.1 | 38.4 |
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| Population - 2010 | 772 | 14,018 | 309,327,143 |
| Population - 2000 | 860 | 5,126 | 285,036,114 |
| Population - 1990 | 923 | 2,512 | 251,960,433 |
| Pop. 2000 to Now | -11.2% | 410.5% | 15.6% |
| Pop. 1990 to Now | -17.2% | 941.6% | 30.8% |
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| Population Density | 484.8 | 1,131.3 | 93.4 |
| Land Area | 1.2 | 20.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Cass Lake, MN | Waukee, IA | United States |
| Age 0 to 4 | 9.9% | 8.4% | 5.9% |
| Age 5 to 9 | 11.8% | 7.9% | 6.1% |
| Age 10 to 14 | 9.7% | 8.7% | 6.6% |
| Age 15 to 17 | 2.9% | 3.8% | 3.9% |
| Age 18 to 20 | 1.6% | 3.3% | 4.0% |
| Age 21 to 24 | 4.3% | 3.7% | 5.2% |
| Age 25 to 34 | 10.6% | 16.0% | 13.8% |
| Age 35 to 44 | 12.2% | 16.7% | 12.9% |
| Age 45 to 54 | 7.3% | 13.0% | 12.6% |
| Age 55 to 59 | 5.7% | 5.0% | 6.7% |
| Age 60 to 64 | 3.2% | 3.0% | 6.3% |
| Age 65 to 74 | 13.1% | 6.3% | 9.6% |
| Age 75 to 84 | 5.6% | 3.1% | 4.5% |
| Age 85 and over | 2.2% | 1.1% | 1.9% |
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| Race | | | |
| | Cass Lake, MN | Waukee, IA | United States |
| White | 13.6% | 83.2% | 59.4% |
| Black | 0.9% | 3.1% | 12.2% |
| Asian | 4.1% | 4.7% | 5.6% |
| Native American | 59.9% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 7.2% | 0.6% | 0.4% |
| Two or More Races | 9.0% | 3.7% | 3.2% |
| Hispanic | 5.4% | 4.6% | 18.4% |
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| Marriage & Family | | | |
| | Cass Lake, MN | Waukee, IA | United States |
| Married Population | 18.0% | 60.8% | 49.8% |
| Currently Married | 16.7% | 60.3% | 48.0% |
| Married but Separated | 1.3% | 0.5% | 1.8% |
| Single Population | 82.0% | 39.2% | 50.2% |
| Never Married | 52.7% | 26.4% | 33.8% |
| Divorced | 21.9% | 9.2% | 10.8% |
| Widowed | 7.3% | 3.5% | 5.6% |
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| Household Size | 2.33 | 2.52 | 2.60 |
| Households | 239 | 9,289 | 124,010,992 |
| Family Households | 114 | 6,104 | 80,755,759 |
| Married couple, w/children | 10.5% | 48.0% | 30.5% |
| Married couple, no children | 14.0% | 34.8% | 42.9% |
| Non Family Households | 125 | 3,185 | 43,255,233 |
| Single householder, w/children | 63.2% | 14.7% | 15.8% |
| Single householder, no children | 12.3% | 2.5% | 10.8% |