91331 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in California based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 91331 is Hispanic. The majority race/ethnicity attending public schools in 91331 is Hispanic. The current unemployment level in 91331 is 6.1%.
| Population | 99,804 |
| Population Growth Rate | 0.00% |
| Population Density | 11,735 People per Square Mile |
| Total Households | 21,402 |
| Percentage High Income Households | 0.9% |
| Median Household Income (2021) | $72,089 |
| Average Adjusted Gross Income (2021) | $302,160 |
| Current Unemployment Rate (September 2025) | 6.1% |
| Sales Tax Rate (2025) | 9.8% |
| Majority Race/Ethnicty | Hispanic - 62.37% |
| Public School Majority Race/Ethnicty | Hispanic - 94.13% |
91331 Race/Ethnicty Breakdown
| Race/Ethnicty | Total | Percentage |
|---|
| White | 45,426 | 31.65% |
| Black | 2,338 | 1.63% |
| Hispanic | 89,439 | 62.32% |
| Asian | 5,300 | 3.69% |
| Native American | 888 | 0.62% |
| Hawaiian/Pac. Islander | 118 | 0.08% |
91331 Public School Race/Ethnicty Breakdown
| Race/Ethnicty | Total | Percentage |
|---|
| White | 191 | 1.75% |
| Black | 148 | 1.35% |
| Hispanic | 10,351 | 94.76% |
| Asian | 221 | 2.02% |
| Native American | 4 | 0.04% |
| Hawaiian/Pac. Islander | 8 | 0.07% |
91331 Educational Attainment Levels
| Highest Education Level Attained | Total | Percentage |
|---|
| Less Than 1 Year of College | 1,727 | 5.55% |
| Bachelor Degree | 3,806 | 12.24% |
| High School Diploma | 12,968 | 41.71% |
| No High School Diploma | 2,240 | 7.2% |
| GED or Alternate | 1,094 | 3.52% |
| 1 or More Years of College | 5,779 | 18.59% |
| Associates Degree | 2,315 | 7.45% |
| Masters Degree | 847 | 2.72% |
| Professional Degree | 225 | 0.72% |
| Doctorate Degree | 91 | 0.29% |