- Lead
- 46,416
- Total
- 284,348
- vs nation
- D+17.8
California 34th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 95,225
- Total
- 328,808
- vs nation
- D+24.5
- Lead
- 92,145
- Total
- 252,256
- vs nation
- D+34.4
- Lead
- 56,215
- Total
- 226,792
- vs nation
- D+20.9
- Lead
- 65,620
- Total
- 235,827
- vs nation
- D+20.6
- Lead
- 22,149
- Total
- 208,449
- vs nation
- D+13.1
- Lead
- 29,179
- Total
- 190,426
- vs nation
- D+14.8
- Lead
- 24,738
- Total
- 171,462
- vs nation
- D+5.9
Key facts
- 2024 presidential margin
- D+16.3MIT Election Lab
- Population
- 945,7812024 5-year
- Population density
- 9,791 / sq mi2024 5-year · TIGER/Line
- Land area
- 96.6 sq miTIGER/Line
- Median household income
- $92,1492024 5-year
- White (non-Hispanic)
- 14.8%2024 5-year
- Black
- 1.9%2024 5-year
- Hispanic / Latino
- 64.5%2024 5-year
- Peak Democratic margin
- D+40.8 in 1912MIT Election Lab
- Peak Republican margin
- R+52.3 in 1924MIT Election Lab
- Most similar
- State Senate District 30, CA · twin score 94.9
presidential history
Party record book
California 34th State Senate 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
65.4%
11,735 votes · D+32.2 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 65.0%
Republican
Herbert Hoover1928
70.9%
8,080 votes · R+43.7 · modeled estimate
Runner-up · James G. Blaine, 1884 · 69.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
208,453votes
63.4% of the vote · D+29.0 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 163,875 votes
Republican
Donald Trump2024
114,613votes
40.3% of the vote · D+16.3 · modeled estimate
Runner-up · Donald Trump, 2020 · 113,228 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
+34.4pts D vs U.S.
Place D+36.5 · U.S. D+2.1 · modeled estimate
Runner-up · Joe Biden, 2020 · +24.5 pts
Republican
Calvin Coolidge1924
+27.1pts R vs U.S.
Place R+52.3 · U.S. R+25.2 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +26.2 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.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2018 | D | 55.6%176,188 | 44.4%140,722 | 316,910 |
Spanning inland Southern California, this district delivered a nearly 20-point Republican margin in 2024 — a rare pocket of consistent GOP strength in a state where statewide offices routinely go the other direction by similar margins.
Across the recorded series it reached a Democratic high of 40.8 points in 1912 and a Republican high of 52.3 points in 1924. Between 2020 and 2024 the district moved 12.6 points toward the Republican candidate; the 2024 margin was 16.3 points.
A population of 945,781, a 15% non-Hispanic-white share, and a median household income of $92,149 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 30 and State Senate District 22.
The state-senate 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 34th State Senate District. Akashic. https://akashic.app/sld-upper/06034/. Accessed May 20, 2026. License: CC BY 4.0.