| | Rio, WI | Dewey, OK | United States |
| Population | 1,007 | 3,375 | 329,725,481 |
| Female Population | 45.8% | 54.7% | 50.5% |
| Male Population | 54.2% | 45.3% | 49.5% |
| Median Age | 39 | 47.8 | 38.4 |
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| Population - 2010 | 1,050 | 3,407 | 309,327,143 |
| Population - 2000 | 938 | 3,179 | 285,036,114 |
| Population - 1990 | 768 | 3,326 | 251,960,433 |
| Pop. 2000 to Now | 11.6% | 7.3% | 15.6% |
| Pop. 1990 to Now | 36.3% | 2.6% | 30.8% |
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| Population Density | 803.7 | 1,183.0 | 93.4 |
| Land Area | 1.3 | 2.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Rio, WI | Dewey, OK | United States |
| Age 0 to 4 | 2.3% | 3.5% | 5.9% |
| Age 5 to 9 | 4.9% | 4.3% | 6.1% |
| Age 10 to 14 | 9.0% | 11.2% | 6.6% |
| Age 15 to 17 | 6.5% | 4.8% | 3.9% |
| Age 18 to 20 | 1.1% | 3.7% | 4.0% |
| Age 21 to 24 | 10.7% | 3.7% | 5.2% |
| Age 25 to 34 | 9.9% | 6.6% | 13.8% |
| Age 35 to 44 | 18.6% | 9.1% | 12.9% |
| Age 45 to 54 | 10.4% | 13.7% | 12.6% |
| Age 55 to 59 | 6.3% | 9.5% | 6.7% |
| Age 60 to 64 | 5.4% | 10.7% | 6.3% |
| Age 65 to 74 | 8.0% | 12.0% | 9.6% |
| Age 75 to 84 | 5.1% | 5.6% | 4.5% |
| Age 85 and over | 1.9% | 1.6% | 1.9% |
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| Race | | | |
| | Rio, WI | Dewey, OK | United States |
| White | 97.3% | 74.0% | 59.4% |
| Black | 0.6% | 0.6% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.3% | 8.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 7.9% | 3.2% |
| Hispanic | 0.0% | 8.4% | 18.4% |
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| Marriage & Family | | | |
| | Rio, WI | Dewey, OK | United States |
| Married Population | 39.2% | 45.0% | 49.8% |
| Currently Married | 39.2% | 44.3% | 48.0% |
| Married but Separated | 0.0% | 0.7% | 1.8% |
| Single Population | 60.8% | 55.0% | 50.2% |
| Never Married | 38.9% | 23.9% | 33.8% |
| Divorced | 13.3% | 21.5% | 10.8% |
| Widowed | 8.6% | 9.6% | 5.6% |
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| Household Size | 2.33 | 2.56 | 2.60 |
| Households | 432 | 1,277 | 124,010,992 |
| Family Households | 287 | 819 | 80,755,759 |
| Married couple, w/children | 22.6% | 28.1% | 30.5% |
| Married couple, no children | 31.7% | 39.4% | 42.9% |
| Non Family Households | 145 | 458 | 43,255,233 |
| Single householder, w/children | 28.9% | 23.4% | 15.8% |
| Single householder, no children | 16.7% | 9.0% | 10.8% |