HarrisDemocratic31.0%6,857TrumpRepublican67.7%14,960OtherAll other candidates1.2%273
R+36.7- Lead
- 8,103
- Total
- 22,090
- vs nation
- R+35.2
modeled Census-place estimatemodeled estimate
Akashicstate senate district
Delaware 21st State Senate District
Contests in this Place (43 available)
President38 · 1876–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
President results by year
Modeled candidate-vote estimate on current district boundaries
BidenDemocratic34.2%7,231TrumpRepublican64.5%13,652OtherAll other candidates1.3%282
R+30.3- Lead
- 6,421
- Total
- 21,165
- vs nation
- R+34.8
modeled Census-place estimatemodeled estimate
ClintonDemocratic29.8%5,698TrumpRepublican66.2%12,649OtherAll other candidates4.0%772
R+36.4- Lead
- 6,951
- Total
- 19,119
- vs nation
- R+38.4
modeled Census-place estimatemodeled estimate
ObamaDemocratic35.1%5,760RomneyRepublican63.9%10,495OtherAll other candidates1.0%171
R+28.8- Lead
- 4,735
- Total
- 16,426
- vs nation
- R+32.7
modeled Census-place estimatemodeled estimate
ObamaDemocratic37.3%5,789McCainRepublican62.0%9,635OtherAll other candidates0.7%109
R+24.8- Lead
- 3,846
- Total
- 15,533
- vs nation
- R+32.0
modeled Census-place estimatemodeled estimate
KerryDemocratic31.4%4,387BushRepublican67.8%9,465OtherAll other candidates0.8%106
R+36.4- Lead
- 5,078
- Total
- 13,958
- vs nation
- R+33.9
modeled Census-place estimatemodeled estimate
GoreDemocratic36.9%4,297BushRepublican60.0%6,983OtherAll other candidates3.1%357
R+23.1- Lead
- 2,686
- Total
- 11,637
- vs nation
- R+23.6
modeled Census-place estimatemodeled estimate
ClintonDemocratic37.6%3,397DoleRepublican49.4%4,462OtherAll other candidates13.0%1,175
R+11.8- Lead
- 1,065
- Total
- 9,034
- vs nation
- R+20.3
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- R+36.7MIT Election Lab
- Population
- 48,9792024 5-year
- Population density
- 168 / sq mi2024 5-year · TIGER/Line
- Land area
- 292 sq miTIGER/Line
- Median household income
- $66,6182024 5-year
- White (non-Hispanic)
- 65.3%2024 5-year
- Black
- 17.0%2024 5-year
- Hispanic / Latino
- 10.7%2024 5-year
- Peak Republican margin
- R+90.2 in 1952MIT Election Lab
- Most similar
- State Senate District 15, DE · twin score 91.1
presidential history
Party record book
Delaware 21st 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
Grover Cleveland1884
49.7%
572 votes · R+0.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 46.6%
Republican
Dwight D. Eisenhower1952
94.7%
3,496 votes · R+90.2 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 74.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
7,231votes
34.2% of the vote · R+30.3 · modeled estimate
Runner-up · Kamala Harris, 2024 · 6,857 votes
Republican
Donald Trump2024
14,960votes
67.7% of the vote · R+36.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 13,652 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
John W. Davis1924
+1.9pts D vs U.S.
Place R+23.3 · U.S. R+25.2 · modeled estimate
Runner-up · James M. Cox, 1920 · −1.3 pts
Republican
Dwight D. Eisenhower1952
+79.5pts R vs U.S.
Place R+90.2 · U.S. R+10.8 · modeled estimate
Runner-up · Donald Trump, 2016 · +38.4 pts
current representation
Current officeholders
RBryant RichardsonState Senate · 21
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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 |
|---|---|---|---|---|
| 2020 | R | 42.4%9,388 | 55.7%12,313 | 22,121 |
| 2018 | R | 49.7%8,440 | 50.3%8,548 | 16,988 |
Delaware 21st State Senate District sits in the Mid-Atlantic. In 2024 it voted Republican.
Across the recorded series it reached a Republican high of 90.2 points in 1952. Between 2020 and 2024 the district moved 6.3 points toward the Republican candidate; the 2024 margin was 36.7 points.
A population of 48,979, a 65% non-Hispanic-white share, and a median household income of $66,618 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 15 and State Senate District 18.
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
State Senate District 15
Delaware
91.1twin score
elasticity2016–2024 trajectory
State Senate District 18
Delaware
90.3twin score
% unaffiliated2016 marginpopulation scale
State Senate District 2
West Virginia
86.1twin score
elasticity2012–2024 trajectory≠ % White
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Delaware 21st State Senate District. Akashic. https://akashic.app/sld-upper/10021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Delaware at the ballot boxAll elections →
Places within Delaware 21st State Senate District
counties it covers1
Frequently asked questions
How did Delaware 21st State Senate District vote in 2024?
In 2024, Delaware 21st State Senate District voted Republican by 36.7 points (R+36.7), carried by the Republican candidate. Out of 22,090 votes cast, 6,857 went Democratic and 14,960 went Republican.
How many people live in Delaware 21st State Senate District?
Delaware 21st State Senate District has a population of 48,979 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Delaware 21st State Senate District?
Median household income in Delaware 21st State Senate District is $66,618 — below the national median of $80,734. The Delaware state median is $84,954.
What is the political history of Delaware 21st State Senate District?
Akashic tracks 38 presidential elections in Delaware 21st State Senate District from 1876 to 2024. Of those, 0 went Democratic and 38 went Republican.