119th Congress · CA-31
California's 31st Congressional District
California's 31st Congressional District (CA-31) has a population of 741,057. The median household income is $90,026 and the median age is 38.9.
741,057
Population
3568
People / sq mi
$90,026
Median Income
38.9
Median Age
CA-31 covers 208 sq mi of land at 3568.4 people per square mile.
Race & Ethnicity
| White | 27.4% |
| Black or African American | 2.7% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 3.8% |
Economy & Income
$90,026
Median Household Income
$34,240
Per Capita Income
8.6%
Poverty Rate
3.9%
Unemployment
Housing
$660,600
Median Home Value
$1,905
Median Rent
59.3%
Homeownership
Education
78.4%
High School+
25.0%
Bachelor's+
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Frequently Asked Questions
California's 31st Congressional District (CA-31) has a population of 741,057 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 31st Congressional District is $90,026, with a per capita income of $34,240.
California's 31st Congressional District is 27.4% White, 2.7% Black, 0.1% Asian, and 3.8% Hispanic or Latino, per Census ACS data.
More from California
Data for California's 31st 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.
In California's 31st Congressional District, home values do the distinguishing — a median of $660,600. With 741,057 residents, California's 31st Congressional District is a congressional district in California.
The typical household earns $90,026 a year, above the US median of $78,538. About 8.6% of residents live below the federal poverty level, below the national 12.4%. A typical home is worth $660,600, with typical rent around $1,905.
Degree attainment is on the lower side for US congressional districts: 25.0% of adults hold a bachelor’s degree, below the national 35.0%.
High housing values reframe the income picture in California's 31st Congressional District — even solid earnings stretch less against home prices and rents at this level.
Source: U.S. Census Bureau ACS, 2026.