| | Iowa, LA | Chino, CA | United States |
| Population | 3,329 | 90,279 | 329,725,481 |
| Female Population | 54.0% | 46.9% | 50.5% |
| Male Population | 46.0% | 53.1% | 49.5% |
| Median Age | 34.1 | 37.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,995 | 78,604 | 309,327,143 |
| Population - 2000 | 2,663 | 67,168 | 285,036,114 |
| Population - 1990 | 2,588 | 59,682 | 251,960,433 |
| Pop. 2000 to Now | 16.8% | 37.4% | 15.6% |
| Pop. 1990 to Now | 20.1% | 54.6% | 30.8% |
| space4 | | | |
| Population Density | 1,039.0 | 3,045.6 | 93.4 |
| Land Area | 3.2 | 29.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Iowa, LA | Chino, CA | United States |
| Age 0 to 4 | 6.9% | 5.9% | 5.9% |
| Age 5 to 9 | 5.7% | 5.7% | 6.1% |
| Age 10 to 14 | 11.0% | 6.6% | 6.6% |
| Age 15 to 17 | 6.4% | 4.1% | 3.9% |
| Age 18 to 20 | 2.5% | 2.5% | 4.0% |
| Age 21 to 24 | 6.3% | 5.2% | 5.2% |
| Age 25 to 34 | 13.0% | 16.0% | 13.8% |
| Age 35 to 44 | 10.1% | 16.4% | 12.9% |
| Age 45 to 54 | 11.1% | 13.7% | 12.6% |
| Age 55 to 59 | 6.4% | 6.3% | 6.7% |
| Age 60 to 64 | 3.4% | 6.0% | 6.3% |
| Age 65 to 74 | 5.3% | 8.0% | 9.6% |
| Age 75 to 84 | 11.2% | 2.8% | 4.5% |
| Age 85 and over | 0.8% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Iowa, LA | Chino, CA | United States |
| White | 67.4% | 20.5% | 59.4% |
| Black | 24.8% | 6.4% | 12.2% |
| Asian | 0.4% | 16.2% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.6% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 5.2% | 2.5% | 3.2% |
| Hispanic | 2.3% | 53.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Iowa, LA | Chino, CA | United States |
| Married Population | 52.9% | 50.4% | 49.8% |
| Currently Married | 51.7% | 48.0% | 48.0% |
| Married but Separated | 1.3% | 2.4% | 1.8% |
| Single Population | 47.1% | 49.6% | 50.2% |
| Never Married | 30.0% | 35.3% | 33.8% |
| Divorced | 11.5% | 10.4% | 10.8% |
| Widowed | 5.6% | 3.9% | 5.6% |
| space5 | | | |
| Household Size | 3.11 | 3.27 | 2.60 |
| Households | 1,069 | 24,753 | 124,010,992 |
| Family Households | 867 | 19,475 | 80,755,759 |
| Married couple, w/children | 24.1% | 36.9% | 30.5% |
| Married couple, no children | 49.6% | 38.5% | 42.9% |
| Non Family Households | 202 | 5,278 | 43,255,233 |
| Single householder, w/children | 21.6% | 13.1% | 15.8% |
| Single householder, no children | 4.7% | 11.5% | 10.8% |