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      Data: MIT Election Lab, VEST, Census Bureau
      Home›California›CA-01

      California's 1st Congressional District

      R+30.7
      ↓ R+6.5 vs 2022· California · Latest: 2024

      Safe Republican — flipped 7 times in 25 elections

      Population761K

      Current Representative

      REPDoug LamalfaElected 2024

      118th Congress boundaries — Historical results before 2022 were contested under prior district lines.

      Ask the Historian

      Explore this district's political evolution with the Historian

      “How has California's 1st Congressional District voted in House elections since 2000?”

      Key Insights

      • Has voted Republican in the last 5 presidential elections
      • Latest election (2024) was a Republican landslide with a 24.9% margin

      Smart Insights

      30 elections analyzed

      AI-generated analysis of voting patterns and trends in CA-01.

      Unlock with Pro$33/mo

      Related Pages

      2024 House ElectionCalifornia Profile

      Who lives in California's 1st Congressional District? 760,971 residents as of the 2020 Census.

      Demographics

      CA-01 vs California vs National

      Population

      Total Population
      761K
      State: 39.3M National: 334.9M
      Share of US Population
      0.23%
      National: 100%
      Voting Age Population
      74.4%
      State: 75.8% National: 75.7%

      Language at Home

      Non-English at Home
      20.1%
      State: 44.4% National: 22.2%
      English Only
      79.9%
      State: 55.6% National: 77.8%

      Economic

      Median Household Income
      $70,421
      State: $102,676 National: $83,960
      Poverty Rate
      15.7%
      State: 12.0% National: 12.5%
      College Degree
      23.6%
      State: 36.6% National: 35.6%
      Homeownership
      62.5%
      State: 55.9% National: 65.2%

      Age & Other

      Median Age
      38.2 yrs
      State: 37.9 yrs National: 39.1 yrs
      Age 18-29
      16.2%
      State: 16.2% National: 15.7%
      Age 65+
      18.7%
      State: 15.7% National: 17.0%
      Foreign Born
      10.8%
      State: 27.0% National: 14.1%

      Who Lives Here

      CA-01 — Census ACS 2024

      White (Non-Hispanic) 60.8%Hispanic 23.7%Asian 6.1%Multiracial 5.8%Black 1.8%Native American 1.8%
      GroupCA-01StateNational
      ▶White (Non-Hispanic)(13)
      60.8%33.8%57.4%
      ▶Hispanic / Latino(18)
      23.7%40.2%19.3%
      ▶Asian(6)
      6.1%15.5%6.0%
      Multiracial / Other
      5.8%3.5%4.0%
      ▶Black(9)
      1.8%5.4%12.2%
      ▶Native American / Alaska Native(5)
      1.8%1.3%0.9%
      ▶Middle Eastern / North African(10)
      0.7%—0.9%

      Census treats race and Hispanic/Latino origin as separate questions. Race categories other than Hispanic reflect total populations (small Hispanic overlap in Black, Asian, AIAN, NHPI). “Multiracial / Other” is derived as a non-overlapping remainder.

      Click rows to expand ancestry detail. Ancestry from ACS B04006, B03001, B02020, B02016. Totals may differ from race — individuals can report multiple ancestries.

      MENA estimated from ancestry reporting — Census does not have a separate MENA race category. Not shown in bar (overlaps with other race groups).

      Similar Districts

      Based on demographic + political profile
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      Competitive, Suburban
      93%

      Similar Districts

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      OK-03Oklahoma
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      TX-13Texas
      Strong Rep, Rural
      91%
      NE-03Nebraska
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      91%
      MO-04Missouri
      Strong Rep, Rural
      90%
      MO-08Missouri
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      More Similar Districts

      7 more similar districts

      See 7 more districts with voting patterns like CA-01.

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      Other California Districts

      CA-02D+43.8CA-03R+10.9CA-04D+32.9CA-05R+23.5CA-06D+15.2CA-07D+33.5CA-08D+47.9CA-09D+3.6CA-10D+33.0CA-11D+62.1CA-12D+100.0CA-13D+0.1CA-14D+35.5CA-15D+46.2CA-16D+100.0CA-17D+35.3CA-18D+29.3CA-19D+38.6CA-20R+100.0CA-21D+5.2CA-22R+6.8CA-23R+20.3CA-24D+25.4CA-25D+12.5CA-26D+12.1CA-27D+2.7CA-28D+29.9CA-29D+39.5CA-30D+36.8CA-31D+19.5CA-32D+32.4CA-33D+17.6CA-34D+100.0CA-35D+16.8CA-36D+37.4CA-37D+78.3CA-38D+19.7CA-39D+13.4CA-40R+10.5CA-41R+3.4CA-42D+36.3CA-43D+50.1CA-44D+42.8CA-45D+0.2CA-46D+26.9CA-47D+2.9CA-48R+18.6CA-49D+4.3CA-50D+28.6CA-51D+21.4CA-52D+32.6

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