119th Congress · CA-42
California's 42nd Congressional District
California's 42nd Congressional District (CA-42) has a population of 744,568. The median household income is $78,006 and the median age is 35.7.
744,568
Population
3507
People / sq mi
$78,006
Median Income
35.7
Median Age
CA-42 covers 212 sq mi of land at 3507.2 people per square mile.
Race & Ethnicity
| White | 35.6% |
| Black or African American | 6.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.2% |
Economy & Income
$78,006
Median Household Income
$34,890
Per Capita Income
11.8%
Poverty Rate
4.4%
Unemployment
Housing
$718,700
Median Home Value
$1,750
Median Rent
38.2%
Homeownership
Education
73.0%
High School+
25.5%
Bachelor's+
Other California Congressional Districts
Largest cities in California
Largest counties in California
State rankings
Frequently Asked Questions
California's 42nd Congressional District (CA-42) has a population of 744,568 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 42nd Congressional District is $78,006, with a per capita income of $34,890.
California's 42nd Congressional District is 35.6% White, 6.1% Black, 0.0% Asian, and 3.2% Hispanic or Latino, per Census ACS data.
More from California
Data for California's 42nd 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.
The this entity record above pulls directly from the U.S. Census Bureau ACS and decennial files. What follows is the per-entity context — how this entity sits in the broader U.S. population demographics distribution and which underlying factors drive the headline numbers.
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.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. states, metros, cities, and ZIPs with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: U.S. Census Bureau ACS, 2026.