| | Santa Paula, CA | California City, CA | United States |
| Population | 30,741 | 14,914 | 329,725,481 |
| Female Population | 50.5% | 42.4% | 50.5% |
| Male Population | 49.5% | 57.6% | 49.5% |
| Median Age | 33.7 | 34 | 38.4 |
| space3 | | | |
| Population - 2010 | 29,700 | 13,463 | 309,327,143 |
| Population - 2000 | 28,598 | 8,385 | 285,036,114 |
| Population - 1990 | 25,062 | 5,955 | 251,960,433 |
| Pop. 2000 to Now | 5.8% | 65.9% | 15.6% |
| Pop. 1990 to Now | 20.7% | 133.6% | 30.8% |
| space4 | | | |
| Population Density | 6,771.2 | 73.3 | 93.4 |
| Land Area | 4.5 | 203.6 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Santa Paula, CA | California City, CA | United States |
| Age 0 to 4 | 7.3% | 6.1% | 5.9% |
| Age 5 to 9 | 7.4% | 8.2% | 6.1% |
| Age 10 to 14 | 8.1% | 5.0% | 6.6% |
| Age 15 to 17 | 5.4% | 2.6% | 3.9% |
| Age 18 to 20 | 3.9% | 3.6% | 4.0% |
| Age 21 to 24 | 6.2% | 6.1% | 5.2% |
| Age 25 to 34 | 13.3% | 21.5% | 13.8% |
| Age 35 to 44 | 14.4% | 15.6% | 12.9% |
| Age 45 to 54 | 12.2% | 10.3% | 12.6% |
| Age 55 to 59 | 4.4% | 5.1% | 6.7% |
| Age 60 to 64 | 4.0% | 4.9% | 6.3% |
| Age 65 to 74 | 7.9% | 7.5% | 9.6% |
| Age 75 to 84 | 3.3% | 2.6% | 4.5% |
| Age 85 and over | 2.1% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Santa Paula, CA | California City, CA | United States |
| White | 14.3% | 34.2% | 59.4% |
| Black | 0.5% | 20.0% | 12.2% |
| Asian | 0.8% | 1.9% | 5.6% |
| Native American | 0.2% | 1.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.4% | 0.3% | 0.4% |
| Two or More Races | 1.0% | 5.3% | 3.2% |
| Hispanic | 82.8% | 37.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Santa Paula, CA | California City, CA | United States |
| Married Population | 49.1% | 45.5% | 49.8% |
| Currently Married | 46.8% | 43.6% | 48.0% |
| Married but Separated | 2.2% | 1.9% | 1.8% |
| Single Population | 50.9% | 54.5% | 50.2% |
| Never Married | 38.1% | 38.4% | 33.8% |
| Divorced | 7.9% | 12.0% | 10.8% |
| Widowed | 4.9% | 4.2% | 5.6% |
| space5 | | | |
| Household Size | 3.41 | 2.76 | 2.60 |
| Households | 8,972 | 4,512 | 124,010,992 |
| Family Households | 6,832 | 2,871 | 80,755,759 |
| Married couple, w/children | 34.1% | 36.9% | 30.5% |
| Married couple, no children | 36.7% | 31.5% | 42.9% |
| Non Family Households | 2,140 | 1,641 | 43,255,233 |
| Single householder, w/children | 15.5% | 19.0% | 15.8% |
| Single householder, no children | 13.7% | 12.7% | 10.8% |