California's 40th Congressional District
California · CA-40
California's 40th Congressional District is one of 52 U.S. House districts in California, represented in Congress by Young Kim (Republican). It is home to roughly 762,998 people, with a median age of 39.3. The population is about 47% White. The median household income is $120,060, and 37% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election the district was highly competitive (R+2).
Representative
Current U.S. House member (source: house.gov).
Geography
CA-40 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 753 square miles, CA-40 is the 293rd-largest of the 435 congressional districts by land area. With about 1,013 residents per square mile, it is a largely suburban district. Its shape is irregular: the district's Polsby-Popper score of 0.24 ranks 262nd of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 47% of CA-40 voters backed Kamala Harris and 49% Donald Trump — a R+2 margin, the 14th-closest result of any district in the country. That is a 4.0-point shift toward the Republicans from 2020, when the district voted D+2.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 39.3 years old; 24% of residents are under 18 and 15.4% are 65 or older. About 18.9% of residents were born outside the United States, and 30.7% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $120,060, the district's median household income ranks 31st of 435 districts nationwide. The typical owner-occupied home is worth $687,957, and the median rent is $2,356 a month. 7.2% of residents live below the poverty line, and workers average a 37.8-minute commute (16.6% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).