119th Congress · CA-4
California's 4th Congressional District
California's 4th Congressional District (CA-4) has a population of 763,128. The median household income is $95,443 and the median age is 39.3.
763,128
Population
202
People / sq mi
$95,443
Median Income
39.3
Median Age
CA-4 covers 3,780 sq mi of land at 201.9 people per square mile.
Race & Ethnicity
| White | 60.1% |
| Black or African American | 3.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.4% |
Economy & Income
$95,443
Median Household Income
$49,247
Per Capita Income
6.3%
Poverty Rate
3.7%
Unemployment
Housing
$654,600
Median Home Value
$1,954
Median Rent
60.9%
Homeownership
Education
87.8%
High School+
35.7%
Bachelor's+
Other California Congressional Districts
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Largest counties in California
State rankings
Frequently Asked Questions
California's 4th Congressional District (CA-4) has a population of 763,128 according to the latest Census ACS 5-Year estimates. Each US Congressional District is drawn to be roughly equal in population (~760K people).
The median household income in California's 4th Congressional District is $95,443, with a per capita income of $49,247.
California's 4th Congressional District is 60.1% White, 3.0% Black, 0.0% Asian, and 3.4% Hispanic or Latino, per Census ACS data.
More from California
Data for California's 4th Congressional District (119th Congress) from the American Community Survey 5-Year estimates. Land area from the Census Gazetteer files. Congressional districts are redrawn after each decennial Census; the 119th Congress (current) uses post-2020 boundaries.
For this entity, the underlying data on this page comes from the U.S. Census Bureau ACS and decennial files. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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.