state senate districtCalifornia 21st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+5.9
2008D+21.2
2012D+17.2
2016D+26.8
2020D+29.2
2024D+22.7
net swing · 2004→2024D+16.8D+5.9 → D+22.7
vs. U.S. · 2024D+24.2D+22.7 vs R+1.5
presidential returns
2024 turnout 63.5% of 668,292 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
254,034
157,560
12,803
424,397
668,292
63.5%
2020
294,684
159,238
10,400
464,322
662,838†
70.1%
2016
234,971
130,377
24,942
390,290
637,846†
61.2%
2012
207,729
145,158
10,776
363,663
608,254†
59.8%
2008
225,799
146,509
1,528
373,836
578,786†
64.6%
2004
187,544
166,188
5,850
359,582
549,318†
65.5%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupCA SD 21CaliforniaUnited States
Mexican19.6%32.3%11.3%
Salvadoran0.5%2.0%0.7%
Guatemalan0.3%1.3%0.5%
Spanish0.3%0.3%—
Puerto Rican0.3%0.6%1.8%
Spaniard0.2%0.3%—
Colombian0.2%0.3%0.4%
German5.3%6.8%12.5%
English5.2%6.3%9.5%
Irish4.7%5.9%9.4%
Italian2.5%3.4%4.8%
American1.7%2.8%5.3%
French1.1%1.3%1.6%
Scottish1.0%0.9%1.3%
Polish0.8%0.9%2.2%
Filipino0.9%3.3%0.9%
Chinese0.5%3.9%1.3%
Asian Indian0.4%2.3%1.4%
Vietnamese0.2%1.7%0.6%
Korean0.2%1.2%0.4%
Japanese0.2%0.6%0.2%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
CA SD 21
California
United States
Median age
36.9
37.9
39.1
Age 18–24
11.4%
9.1%
9.2%
Age 65 and older
17.7%
15.6%
17.2%
Household economy
Measure
CA SD 21
California
United States
Median household income
$98,590
$99,122
$84,427
Poverty rate
12.4%
12.0%
12.5%
Bachelor's degree or higher (25+)
36.7%
36.6%
35.6%
Languages at home
Measure
CA SD 21
California
United States
Speaks a non-English language at home
37.3%
44.4%
22.3%
Spanish
29.8%
28.4%
13.6%
Other Indo-European
1.6%
3.4%
2.0%
Chinese (incl. Mandarin & Cantonese)
1.0%
3.5%
1.1%
Tagalog (incl. Filipino)
1.2%
2.1%
0.6%
Religious landscape
Measure
CA SD 21
California
United States
Catholic
—
26.2%
18.6%
Evangelical Protestant
—
9.0%
16.5%
Unclaimed / not counted
—
55.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
California 21st State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+5.9%
2008
+21.2%
2012
+17.2%
2016
+26.8%
2020
+29.2%
2024
+22.7%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
59.9%Harris254,034
37.1%Trump157,560
3.0%
D+22.7
R+6.4
D+24.2
424,397
D
63.5%Biden294,684
34.3%Trump159,238
2.2%
D+29.2
D+2.4
D+24.7
464,322
D
60.2%Clinton234,971
33.4%Trump130,377
6.4%
D+26.8
D+9.6
D+24.7
390,290
D
57.1%Obama207,729
39.9%Romney145,158
3.0%
D+17.2
R+4.0
D+13.4
363,663
D
60.4%Obama225,799
39.2%McCain146,509
0.4%
D+21.2
D+15.3
D+13.9
373,836
D
52.2%Kerry187,544
46.2%Bush166,188
1.6%
D+5.9
—
D+8.4
359,582
current representation
Current officeholders
DMonique LimónState Senate · 21
State legislative officeholder from OpenStates nightly current-legislator data.
Anchored in the inland regions of Southern California, this district posts presidential margins exceeding 30 points in a state Democrats dominate statewide, making it a consistent outlier in California's legislative map.
Across the recorded series it reached a Democratic high of 29.2 points in 2020. Between 2020 and 2024 the district moved 6.4 points toward the Republican candidate; the 2024 margin was 22.7 points.
A population of 1,024,296, a 21% non-Hispanic-white share, and a median household income of $98,590 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 17 and State Senate District 33.
Akashic
Political twins — state-senate districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
California 21st State Senate District. Akashic. https://akashic.app/sld-upper/06021/. Accessed May 20, 2026. License: CC BY 4.0.
How did California 21st State Senate District vote in 2024?
In 2024, California 21st State Senate District voted Democratic by 22.7 points (D+22.7), carried by the Democratic candidate. Out of 424,397 votes cast, 254,034 went Democratic and 157,560 went Republican.
How many people live in California 21st State Senate District?
California 21st State Senate District has a population of 1,024,296 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in California 21st State Senate District?
Median household income in California 21st State Senate District is $98,590 — above the national median of $80,734. The California state median is $99,122.
What is the political history of California 21st State Senate District?
Akashic tracks 6 presidential elections in California 21st State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
