| | Cache, OK | Elberon, IA | United States |
| Population | 2,914 | 132 | 329,725,481 |
| Female Population | 48.9% | 39.4% | 50.5% |
| Male Population | 51.1% | 60.6% | 49.5% |
| Median Age | 36.3 | 47.5 | 38.4 |
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| Population - 2010 | 2,828 | 195 | 309,327,143 |
| Population - 2000 | 2,371 | 245 | 285,036,114 |
| Population - 1990 | 2,251 | 203 | 251,960,433 |
| Pop. 2000 to Now | 19.1% | -23.3% | 15.6% |
| Pop. 1990 to Now | 25.5% | -7.4% | 30.8% |
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| Population Density | 829.5 | 202.1 | 93.4 |
| Land Area | 3.5 | 0.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Cache, OK | Elberon, IA | United States |
| Age 0 to 4 | 5.7% | 4.5% | 5.9% |
| Age 5 to 9 | 7.7% | 3.0% | 6.1% |
| Age 10 to 14 | 7.1% | 0.8% | 6.6% |
| Age 15 to 17 | 6.0% | 1.5% | 3.9% |
| Age 18 to 20 | 3.0% | 0.0% | 4.0% |
| Age 21 to 24 | 3.8% | 6.1% | 5.2% |
| Age 25 to 34 | 14.9% | 23.5% | 13.8% |
| Age 35 to 44 | 13.9% | 9.1% | 12.9% |
| Age 45 to 54 | 11.7% | 9.8% | 12.6% |
| Age 55 to 59 | 6.0% | 1.5% | 6.7% |
| Age 60 to 64 | 8.5% | 12.1% | 6.3% |
| Age 65 to 74 | 6.3% | 22.7% | 9.6% |
| Age 75 to 84 | 4.0% | 5.3% | 4.5% |
| Age 85 and over | 1.4% | 0.0% | 1.9% |
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| Race | | | |
| | Cache, OK | Elberon, IA | United States |
| White | 61.2% | 99.2% | 59.4% |
| Black | 3.3% | 0.0% | 12.2% |
| Asian | 1.3% | 0.0% | 5.6% |
| Native American | 6.6% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.5% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 13.9% | 0.0% | 3.2% |
| Hispanic | 13.3% | 0.0% | 18.4% |
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| Marriage & Family | | | |
| | Cache, OK | Elberon, IA | United States |
| Married Population | 58.7% | 59.5% | 49.8% |
| Currently Married | 53.3% | 59.5% | 48.0% |
| Married but Separated | 5.4% | 0.0% | 1.8% |
| Single Population | 41.3% | 40.5% | 50.2% |
| Never Married | 24.6% | 27.3% | 33.8% |
| Divorced | 11.6% | 9.9% | 10.8% |
| Widowed | 5.1% | 3.3% | 5.6% |
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| Household Size | 2.63 | 2.69 | 2.60 |
| Households | 1,110 | 49 | 124,010,992 |
| Family Households | 764 | 41 | 80,755,759 |
| Married couple, w/children | 40.7% | 19.5% | 30.5% |
| Married couple, no children | 35.9% | 65.9% | 42.9% |
| Non Family Households | 346 | 8 | 43,255,233 |
| Single householder, w/children | 19.0% | 2.4% | 15.8% |
| Single householder, no children | 4.5% | 12.2% | 10.8% |