| | California, MO | Omaha, AR | United States |
| Population | 4,556 | 92 | 329,725,481 |
| Female Population | 53.6% | 59.8% | 50.5% |
| Male Population | 46.4% | 40.2% | 49.5% |
| Median Age | 36.3 | 39.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,308 | 171 | 309,327,143 |
| Population - 2000 | 4,005 | 165 | 285,036,114 |
| Population - 1990 | 3,465 | 207 | 251,960,433 |
| Pop. 2000 to Now | 9.9% | 4.2% | 15.6% |
| Pop. 1990 to Now | 27.1% | -16.9% | 30.8% |
| space4 | | | |
| Population Density | 1,215.3 | 235.9 | 93.4 |
| Land Area | 3.7 | 0.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | California, MO | Omaha, AR | United States |
| Age 0 to 4 | 5.0% | 1.1% | 5.9% |
| Age 5 to 9 | 6.1% | 14.1% | 6.1% |
| Age 10 to 14 | 7.8% | 7.6% | 6.6% |
| Age 15 to 17 | 6.4% | 8.7% | 3.9% |
| Age 18 to 20 | 4.8% | 0.0% | 4.0% |
| Age 21 to 24 | 3.6% | 1.1% | 5.2% |
| Age 25 to 34 | 13.3% | 6.5% | 13.8% |
| Age 35 to 44 | 14.1% | 16.3% | 12.9% |
| Age 45 to 54 | 11.2% | 13.0% | 12.6% |
| Age 55 to 59 | 5.4% | 4.3% | 6.7% |
| Age 60 to 64 | 5.7% | 4.3% | 6.3% |
| Age 65 to 74 | 9.7% | 17.4% | 9.6% |
| Age 75 to 84 | 4.7% | 4.3% | 4.5% |
| Age 85 and over | 2.3% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | California, MO | Omaha, AR | United States |
| White | 80.9% | 82.6% | 59.4% |
| Black | 2.7% | 0.0% | 12.2% |
| Asian | 0.8% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.5% | 10.9% | 3.2% |
| Hispanic | 12.1% | 6.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | California, MO | Omaha, AR | United States |
| Married Population | 46.8% | 49.3% | 49.8% |
| Currently Married | 45.6% | 43.7% | 48.0% |
| Married but Separated | 1.2% | 5.6% | 1.8% |
| Single Population | 53.2% | 50.7% | 50.2% |
| Never Married | 28.5% | 14.1% | 33.8% |
| Divorced | 16.7% | 26.8% | 10.8% |
| Widowed | 8.0% | 9.9% | 5.6% |
| space5 | | | |
| Household Size | 2.54 | 2.49 | 2.60 |
| Households | 1,761 | 37 | 124,010,992 |
| Family Households | 1,105 | 16 | 80,755,759 |
| Married couple, w/children | 34.4% | 43.8% | 30.5% |
| Married couple, no children | 35.6% | 37.5% | 42.9% |
| Non Family Households | 656 | 21 | 43,255,233 |
| Single householder, w/children | 22.5% | 12.5% | 15.8% |
| Single householder, no children | 7.5% | 6.3% | 10.8% |