Census ACS · California
ZIP Code 91331
ZIP code 91331 is located in California with a population of 98,820. The median household income is $82,025 and the median home value is $609,300.
98,820
Population
$82,025
Median Income
$609,300
Median Home Value
34.7
Median Age
Race & Ethnicity
| White | 21.7% |
| Black | 2.1% |
| Asian | 0.0% |
| Hispanic (any race) | 2.5% |
Male: 51.4% · Female: 48.6%
Economy & Income
$82,025
Median Household Income
$24,032
Per Capita Income
13.5%
Poverty Rate
Housing
$609,300
Median Home Value
$1,818
Median Rent
62.8%
Homeownership
Education
58.1%
High School+
11.2%
Bachelor's Degree+
Nearby ZIP Codes
Largest cities in California
Part of California
Metro areas in California
Common questions about ZIP 91331
Frequently Asked Questions
ZIP code 91331 in California has a population of 98,820 according to latest Census ACS data.
The median household income in ZIP 91331 is $82,025. The per capita income is $24,032. The poverty rate is 13.5%.
ZIP code 91331 is located in California.
More from California
Data for ZIP Code Tabulation Area (ZCTA) 91331 from the American Community Survey 5-Year estimates. ZCTAs approximately correspond to USPS ZIP code delivery areas but are built from Census blocks and may not match exactly.
this entity is one of the data points covered by this site’s U.S. population demographics dataset. The detail above comes directly from the U.S. Census Bureau ACS and decennial files; the context that follows situates the headline numbers against the broader distribution across U.S. states, metros, cities, and ZIPs.
The methodology behind every numeric value on this page is publicly documented on the the U.S. Census Bureau ACS and decennial files portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. states, metros, cities, and ZIPs. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: U.S. Census Bureau ACS, 2026.