Who represents the California 4th congressional district?

Rep. Mike Thompson (Democratic-CA) represents California’s 4th district in the U.S. House of Representatives.

California district 4 candidates 2026

Rep. Mike Thompson (Democratic-CA) is the current representative for California’s 4th district. The district is heavily Democratic (D+33).

California district 4 election results

Rep. Mike Thompson won the 2024 general election with 66.46% of the vote. 342,680 total votes were cast. The full result was 66.46% Democratic, 33.54% Republican. The district is heavily Democratic (D+33).

2026 MidtermsSolid SeatD+33R shift +3$2.0M raised

Recent Votes

NayonHR4758(Homeowner Energy Freedom Act)·Feb 25NayonHR4626(Don’t Mess With My Home Applia...)·Feb 24NayonHRES1075(Providing for consideration of...)·Feb 24NayonHR4758(Homeowner Energy Freedom Act)·Feb 25NayonHR4626(Don’t Mess With My Home Applia...)·Feb 24NayonHRES1075(Providing for consideration of...)·Feb 24NayonHR4758(Homeowner Energy Freedom Act)·Feb 25NayonHR4626(Don’t Mess With My Home Applia...)·Feb 24NayonHRES1075(Providing for consideration of...)·Feb 24NayonHR4758(Homeowner Energy Freedom Act)·Feb 25NayonHR4626(Don’t Mess With My Home Applia...)·Feb 24NayonHRES1075(Providing for consideration of...)·Feb 24

Representative Mike Thompson, Democratic from California

Representative · CA-4

Mike Thompson

Q: California district 4 demographics

The California 4th congressional district is 32.7% Hispanic, 56.2% White, 2.9% Black, 8.5% Asian. The median age is 39.3. Median household income is $97,540. 17.9% of residents are foreign-born. Source: Census ACS.

California's 4th congressional district

Representative Mike Thompson represents California's 4th congressional district, serving 764,257 constituents. The district has an estimated median household income of $97,540 and an unemployment rate of 6.5%.

Economic & Demographic Snapshot

764,257Population

↓ 88

$97,540Median Incomenat'l $37,585

↑ $5,584

6.5%Unemploymentnat'l 3.5%

↑ 0.7%

6.7%Poverty Ratenat'l 12.4%

↑ 0.5%

61.2%Homeownershipnat'l 65.5%

→ no change

$2,045Median Rentnat'l $1,163

↑ $163

1.5%Public Transitnat'l 5%

→ no change

25.7 minMean Commutenat'l 26.4 min

↓ 0.3 min

Data sourced from U.S. Census Bureau ACS 5-Year Estimates (2017-2021 vs. 2019-2023). All figures are statistical estimates with 90% confidence level.

California District 4 Demographics

Median Age 39.3 (vs 38.5) · Homeownership 61.2% (vs 65.5%) · Bachelor’s+ 36.2% (vs 33.7%) · Poverty 6.7% (vs 12.4%) · Income $97,540 (vs $37,585)

Key Issues for This District

Immigration policyEducation accessRent burden

Age Distribution

Near the national median age (39.3 vs 38.5 nationally). The largest age cohort is 20–29 at 14.5%.

Race & Ethnicity

A majority-minority district. White residents are the largest group at 56.2%. Also significant: Hispanic (32.7%).

* Hispanic includes respondents of any race. Racial categories include both Hispanic and non-Hispanic individuals.

Education

36.2% hold a bachelor’s degree or higher, above the 33.7% national average. 12.2% of residents lack a high school diploma.

Income Distribution

Median household income is $97,540, well above the $37,585 national median.

Housing

Homeownership at 61.2% (vs 65.5% nationally). Median rent is $2,045. Median home value is $679,600.

How People Get to Work

69.7% drive alone. Average commute is 25.7 minutes.

Source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates

Data represents 5-year statistical estimates for increased reliability.

California District 4 FAQ

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