| | Independence, IA | Dyersville, IA | United States |
| Population | 6,088 | 4,276 | 329,725,481 |
| Female Population | 52.0% | 48.8% | 50.5% |
| Male Population | 48.0% | 51.2% | 49.5% |
| Median Age | 41.3 | 44.8 | 38.4 |
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| Population - 2010 | 5,972 | 4,090 | 309,327,143 |
| Population - 2000 | 6,014 | 4,035 | 285,036,114 |
| Population - 1990 | 5,972 | 3,703 | 251,960,433 |
| Pop. 2000 to Now | 3.1% | 10.1% | 15.6% |
| Pop. 1990 to Now | 3.9% | 19.9% | 30.8% |
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| Population Density | 1,002.0 | 633.4 | 93.4 |
| Land Area | 6.1 | 6.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Independence, IA | Dyersville, IA | United States |
| Age 0 to 4 | 5.9% | 6.6% | 5.9% |
| Age 5 to 9 | 5.3% | 6.3% | 6.1% |
| Age 10 to 14 | 7.6% | 5.8% | 6.6% |
| Age 15 to 17 | 4.9% | 4.1% | 3.9% |
| Age 18 to 20 | 3.7% | 2.6% | 4.0% |
| Age 21 to 24 | 2.5% | 3.8% | 5.2% |
| Age 25 to 34 | 12.7% | 10.4% | 13.8% |
| Age 35 to 44 | 13.9% | 10.7% | 12.9% |
| Age 45 to 54 | 11.5% | 15.0% | 12.6% |
| Age 55 to 59 | 5.4% | 8.0% | 6.7% |
| Age 60 to 64 | 4.9% | 8.4% | 6.3% |
| Age 65 to 74 | 11.1% | 8.3% | 9.6% |
| Age 75 to 84 | 7.8% | 7.4% | 4.5% |
| Age 85 and over | 2.7% | 2.6% | 1.9% |
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| Race | | | |
| | Independence, IA | Dyersville, IA | United States |
| White | 91.6% | 90.6% | 59.4% |
| Black | 1.7% | 2.6% | 12.2% |
| Asian | 0.0% | 0.5% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.4% | 0.2% | 3.2% |
| Hispanic | 4.2% | 6.2% | 18.4% |
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| Marriage & Family | | | |
| | Independence, IA | Dyersville, IA | United States |
| Married Population | 48.7% | 60.7% | 49.8% |
| Currently Married | 47.7% | 60.7% | 48.0% |
| Married but Separated | 0.9% | 0.0% | 1.8% |
| Single Population | 51.3% | 39.3% | 50.2% |
| Never Married | 26.8% | 23.5% | 33.8% |
| Divorced | 15.4% | 6.8% | 10.8% |
| Widowed | 9.1% | 8.9% | 5.6% |
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| Household Size | 2.35 | 2.34 | 2.60 |
| Households | 2,540 | 1,813 | 124,010,992 |
| Family Households | 1,509 | 1,240 | 80,755,759 |
| Married couple, w/children | 32.2% | 34.8% | 30.5% |
| Married couple, no children | 42.6% | 49.4% | 42.9% |
| Non Family Households | 1,031 | 573 | 43,255,233 |
| Single householder, w/children | 18.5% | 12.6% | 15.8% |
| Single householder, no children | 6.7% | 3.2% | 10.8% |