- Lead
- 17,533
- Total
- 143,789
- vs nation
- D+13.7
California 45th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 49,122
- Total
- 160,156
- vs nation
- D+26.2
- Lead
- 44,483
- Total
- 123,002
- vs nation
- D+34.1
- Lead
- 36,895
- Total
- 109,097
- vs nation
- D+30.0
- Lead
- 37,721
- Total
- 112,178
- vs nation
- D+26.4
- Lead
- 15,610
- Total
- 91,970
- vs nation
- D+19.4
- Lead
- 21,276
- Total
- 83,262
- vs nation
- D+25.0
- Lead
- 19,260
- Total
- 76,079
- vs nation
- D+16.8
Key facts
- 2024 presidential margin
- D+12.2MIT Election Lab
- Population
- 486,3402024 5-year
- Population density
- 3,317 / sq mi2024 5-year · TIGER/Line
- Land area
- 147 sq miTIGER/Line
- Median household income
- $80,5932024 5-year
- White (non-Hispanic)
- 14.9%2024 5-year
- Black
- 11.0%2024 5-year
- Hispanic / Latino
- 65.9%2024 5-year
- Peak Democratic margin
- D+48.0 in 1936MIT Election Lab
- Peak Republican margin
- R+33.2 in 1924MIT Election Lab
- Most similar
- Assembly District 60, CA · twin score 99.1
presidential history
Party record book
California 45th State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
73.5%
8,133 votes · D+48.0 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 70.7%
Republican
Herbert Hoover1928
60.2%
3,798 votes · R+21.8 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 50.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
102,724votes
64.1% of the vote · D+30.7 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 79,673 votes
Republican
Donald Trump2024
61,086votes
42.5% of the vote · D+12.2 · modeled estimate
Runner-up · Donald Trump, 2020 · 53,602 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Hillary Clinton2016
+34.1pts D vs U.S.
Place D+36.2 · U.S. D+2.1 · modeled estimate
Runner-up · Adlai Stevenson, 1956 · +31.1 pts
Republican
Calvin Coolidge1924
+8.0pts R vs U.S.
Place R+33.2 · U.S. R+25.2 · modeled estimate
Runner-up · William McKinley, 1896 · +6.4 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Anchored in the beach cities and Westside communities of Los Angeles County, AD-45 ranks among California's more reliably Democratic assembly seats, with presidential margins that have held well above 20 points across recent cycles.
Across the recorded series it reached a Democratic high of 48.0 points in 1936 and a Republican high of 33.2 points in 1924. Between 2020 and 2024 the district moved 18.5 points toward the Republican candidate; the 2024 margin was 12.2 points.
A population of 486,340, a 15% non-Hispanic-white share, and a median household income of $80,593 describe the district. The district's voting pattern over the last decade is most similar to that of Assembly District 60 and Assembly District 31.
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
California 45th State House District. Akashic. https://akashic.app/sld-lower/06045/. Accessed May 20, 2026. License: CC BY 4.0.