| | Clive, IA | Winchester, CA | United States |
| Population | 18,323 | 3,300 | 329,725,481 |
| Female Population | 48.9% | 43.3% | 50.5% |
| Male Population | 51.1% | 56.7% | 49.5% |
| Median Age | 37.8 | 38 | 38.4 |
| space3 | | | |
| Population - 2010 | 15,510 | 2,844 | 309,327,143 |
| Population - 2000 | 12,855 | 2,155 | 285,036,114 |
| Population - 1990 | 7,462 | 1,689 | 251,960,433 |
| Pop. 2000 to Now | 35.7% | 34.1% | 15.6% |
| Pop. 1990 to Now | 133.8% | 71.1% | 30.8% |
| space4 | | | |
| Population Density | 2,384.3 | 412.1 | 93.4 |
| Land Area | 7.7 | 8.0 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Clive, IA | Winchester, CA | United States |
| Age 0 to 4 | 5.1% | 4.8% | 5.9% |
| Age 5 to 9 | 9.5% | 6.1% | 6.1% |
| Age 10 to 14 | 7.0% | 3.5% | 6.6% |
| Age 15 to 17 | 4.9% | 6.0% | 3.9% |
| Age 18 to 20 | 2.7% | 5.5% | 4.0% |
| Age 21 to 24 | 2.3% | 7.9% | 5.2% |
| Age 25 to 34 | 13.2% | 12.2% | 13.8% |
| Age 35 to 44 | 14.8% | 7.8% | 12.9% |
| Age 45 to 54 | 14.4% | 10.6% | 12.6% |
| Age 55 to 59 | 6.4% | 8.8% | 6.7% |
| Age 60 to 64 | 5.1% | 10.8% | 6.3% |
| Age 65 to 74 | 8.4% | 5.5% | 9.6% |
| Age 75 to 84 | 4.3% | 9.8% | 4.5% |
| Age 85 and over | 2.1% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Clive, IA | Winchester, CA | United States |
| White | 80.5% | 35.8% | 59.4% |
| Black | 3.8% | 0.4% | 12.2% |
| Asian | 5.4% | 6.3% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 2.2% | 1.9% | 3.2% |
| Hispanic | 7.9% | 55.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Clive, IA | Winchester, CA | United States |
| Married Population | 65.4% | 42.1% | 49.8% |
| Currently Married | 64.5% | 41.0% | 48.0% |
| Married but Separated | 1.0% | 1.0% | 1.8% |
| Single Population | 34.6% | 57.9% | 50.2% |
| Never Married | 23.1% | 40.3% | 33.8% |
| Divorced | 7.8% | 11.8% | 10.8% |
| Widowed | 3.6% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.63 | 4.08 | 2.60 |
| Households | 6,959 | 809 | 124,010,992 |
| Family Households | 5,025 | 636 | 80,755,759 |
| Married couple, w/children | 39.0% | 30.0% | 30.5% |
| Married couple, no children | 48.7% | 41.0% | 42.9% |
| Non Family Households | 1,934 | 173 | 43,255,233 |
| Single householder, w/children | 9.7% | 14.6% | 15.8% |
| Single householder, no children | 2.6% | 14.3% | 10.8% |