- Lead
- 64,087
- Total
- 369,936
- vs nation
- D+18.8
California 30th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 139,727
- Total
- 426,515
- vs nation
- D+28.3
- Lead
- 131,360
- Total
- 336,580
- vs nation
- D+36.9
- Lead
- 94,342
- Total
- 314,980
- vs nation
- D+26.1
- Lead
- 94,264
- Total
- 329,437
- vs nation
- D+21.3
- Lead
- 44,304
- Total
- 304,250
- vs nation
- D+17.0
- Lead
- 50,574
- Total
- 271,223
- vs nation
- D+18.1
- Lead
- 40,778
- Total
- 241,988
- vs nation
- D+8.3
Key facts
- 2024 presidential margin
- D+17.3MIT Election Lab
- Population
- 987,8502024 5-year
- Population density
- 5,257 / sq mi2024 5-year · TIGER/Line
- Land area
- 188 sq miTIGER/Line
- Median household income
- $96,7082024 5-year
- White (non-Hispanic)
- 12.7%2024 5-year
- Black
- 3.0%2024 5-year
- Hispanic / Latino
- 61.5%2024 5-year
- Peak Democratic margin
- D+39.0 in 2016MIT Election Lab
- Peak Republican margin
- R+63.2 in 1924MIT Election Lab
- Most similar
- State Senate District 22, CA · twin score 98.7
presidential history
Party record book
California 30th 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
Hillary Clinton2016
66.6%
224,065 votes · D+39.0 · modeled estimate
Runner-up · Joe Biden, 2020 · 65.4%
Republican
Herbert Hoover1928
73.5%
55,108 votes · R+48.9 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 73.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
278,766votes
65.4% of the vote · D+32.8 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 224,065 votes
Republican
Richard Nixon1972
175,579votes
60.2% of the vote · R+23.7 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 165,498 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
+36.9pts D vs U.S.
Place D+39.0 · U.S. D+2.1 · modeled estimate
Runner-up · Joe Biden, 2020 · +28.3 pts
Republican
Calvin Coolidge1924
+38.0pts R vs U.S.
Place R+63.2 · U.S. R+25.2 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · +37.2 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.
The district recorded a Democratic presidential margin of D+17.3 in 2024, compared with D+28.6 in 2008. No racial group formed a majority of its residents in the 2024 ACS 5-year, with Hispanic or Latino residents at 46.5%.
Across the recorded series it reached a Democratic high of 39.0 points in 2016 and a Republican high of 63.2 points in 1924. Between 2020 and 2024 the district moved 15.4 points toward the Republican candidate; the 2024 margin was 17.3 points.
A population of 987,850, a 13% non-Hispanic-white share, and a median household income of $96,708 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 34.
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 30th State Senate District. Akashic. https://akashic.app/sld-upper/06030/. Accessed May 20, 2026. License: CC BY 4.0.