- Lead
- 5,375
- Total
- 35,669
- vs nation
- R+13.6
Delaware 20th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 5,095
- Total
- 30,473
- vs nation
- R+21.2
- Lead
- 6,512
- Total
- 23,276
- vs nation
- R+30.1
- Lead
- 3,887
- Total
- 20,317
- vs nation
- R+23.0
- Lead
- 2,849
- Total
- 19,395
- vs nation
- R+22.0
- Lead
- 4,834
- Total
- 17,031
- vs nation
- R+25.9
- Lead
- 2,055
- Total
- 14,255
- vs nation
- R+14.9
- Lead
- 414
- Total
- 11,008
- vs nation
- R+12.3
Key facts
- 2024 presidential margin
- R+15.1MIT Election Lab
- Population
- 49,0842024 5-year
- Population density
- 447 / sq mi2024 5-year · TIGER/Line
- Land area
- 110 sq miTIGER/Line
- Median household income
- $88,5612024 5-year
- White (non-Hispanic)
- 79.9%2024 5-year
- Black
- 6.1%2024 5-year
- Hispanic / Latino
- 8.6%2024 5-year
- Peak Democratic margin
- D+11.2 in 1884MIT Election Lab
- Peak Republican margin
- R+86.7 in 1952MIT Election Lab
- Most similar
- State Senate District 19, DE · twin score 95.8
presidential history
Party record book
Delaware 20th 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
55.5%
850 votes · D+11.2 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 51.9%
Republican
Dwight D. Eisenhower1952
93.0%
3,999 votes · R+86.7 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 70.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
14,941votes
41.9% of the vote · R+15.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 12,547 votes
Republican
Donald Trump2024
20,316votes
57.0% of the vote · R+15.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 17,642 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
James M. Cox1920
+12.4pts D vs U.S.
Place R+13.8 · U.S. R+26.2 · modeled estimate
Runner-up · John W. Davis, 1924 · +10.4 pts
Republican
Dwight D. Eisenhower1952
+76.0pts R vs U.S.
Place R+86.7 · U.S. R+10.8 · modeled estimate
Runner-up · Donald Trump, 2016 · +30.1 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.
With roughly 49,000 residents, this district sits in Delaware's competitive middle tier — Democratic-leaning at the presidential level but close enough that local candidate strength and turnout patterns can meaningfully shift outcomes.
Across the recorded series it reached a Democratic high of 11.2 points in 1884 and a Republican high of 86.7 points in 1952. Between 2020 and 2024 the district moved 1.7 points toward the Democratic candidate; the 2024 margin was 15.1 points.
A population of 49,084, a 80% non-Hispanic-white share, and a median household income of $88,561 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 46.
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 →
Delaware 20th State Senate District. Akashic. https://akashic.app/sld-upper/10020/. Accessed May 20, 2026. License: CC BY 4.0.