- Lead
- 4,695
- Total
- 19,525
- vs nation
- D+25.5
Delaware 9th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 6,277
- Total
- 21,239
- vs nation
- D+25.1
- Lead
- 4,028
- Total
- 19,524
- vs nation
- D+18.5
- Lead
- 4,697
- Total
- 18,614
- vs nation
- D+21.4
- Lead
- 6,043
- Total
- 18,839
- vs nation
- D+24.8
- Lead
- 2,218
- Total
- 18,020
- vs nation
- D+14.8
- Lead
- 2,211
- Total
- 15,909
- vs nation
- D+13.4
- Lead
- 1,689
- Total
- 13,597
- vs nation
- D+3.9
Key facts
- 2024 presidential margin
- D+24.0MIT Election Lab
- Population
- 44,8722024 5-year
- Population density
- 2,244 / sq mi2024 5-year · TIGER/Line
- Land area
- 20 sq miTIGER/Line
- Median household income
- $77,3392024 5-year
- White (non-Hispanic)
- 57.6%2024 5-year
- Black
- 15.9%2024 5-year
- Hispanic / Latino
- 14.8%2024 5-year
- Peak Democratic margin
- D+32.1 in 2008MIT Election Lab
- Peak Republican margin
- R+44.0 in 1928MIT Election Lab
- Most similar
- State Senate District 7, DE · twin score 93.9
presidential history
Party record book
Delaware 9th 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
Barack Obama2008
65.2%
12,283 votes · D+32.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 63.9%
Republican
Herbert Hoover1928
71.8%
3,983 votes · R+44.0 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 64.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
13,568votes
63.9% of the vote · D+29.6 · modeled estimate
Runner-up · Barack Obama, 2008 · 12,283 votes
Republican
Ronald Reagan1984
8,579votes
61.9% of the vote · R+24.1 · modeled estimate
Runner-up · Richard Nixon, 1972 · 8,440 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
Kamala Harris2024
+25.5pts D vs U.S.
Place D+24.0 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +25.1 pts
Republican
Herbert Hoover1932
+36.7pts R vs U.S.
Place R+18.9 · U.S. D+17.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +26.5 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.
Delaware 9th State Senate District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 32.1 points in 2008 and a Republican high of 44.0 points in 1928. Between 2020 and 2024 the district moved 5.5 points toward the Republican candidate; the 2024 margin was 24.0 points.
A population of 44,872, a 58% non-Hispanic-white share, and a median household income of $77,339 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 7 and State Senate District 11.
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 9th State Senate District. Akashic. https://akashic.app/sld-upper/10009/. Accessed May 20, 2026. License: CC BY 4.0.