- Lead
- 2,631
- Total
- 16,895
- vs nation
- D+17.0
Delaware 9th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,275
- Total
- 14,471
- vs nation
- D+11.3
- Lead
- 208
- Total
- 10,295
- vs nation
- R+0.1
- Lead
- 560
- Total
- 9,762
- vs nation
- D+1.9
- Lead
- 1,294
- Total
- 9,732
- vs nation
- D+6.0
- Lead
- 714
- Total
- 9,750
- vs nation
- R+4.9
- Lead
- 482
- Total
- 8,498
- vs nation
- R+6.2
- Lead
- 387
- Total
- 7,175
- vs nation
- R+13.9
Key facts
- 2024 presidential margin
- D+15.6MIT Election Lab
- Population
- 25,1232024 5-year
- Population density
- 325 / sq mi2024 5-year · TIGER/Line
- Land area
- 77.4 sq miTIGER/Line
- Median household income
- $143,3552024 5-year
- White (non-Hispanic)
- 61.9%2024 5-year
- Black
- 21.3%2024 5-year
- Hispanic / Latino
- 5.3%2024 5-year
- Peak Democratic margin
- D+15.7 in 2020MIT Election Lab
- Peak Republican margin
- R+58.3 in 1928MIT Election Lab
- Most similar
- State Representative District 27, DE · twin score 89.2
presidential history
Party record book
Delaware 9th State House 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
Joe Biden2020
57.2%
8,275 votes · D+15.7 · modeled estimate
Runner-up · Kamala Harris, 2024 · 57.0%
Republican
Herbert Hoover1928
78.9%
2,648 votes · R+58.3 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 73.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
9,638votes
57.0% of the vote · D+15.6 · modeled estimate
Runner-up · Joe Biden, 2020 · 8,275 votes
Republican
Donald Trump2024
7,007votes
41.5% of the vote · D+15.6 · modeled estimate
Runner-up · Donald Trump, 2020 · 6,000 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
+17.0pts D vs U.S.
Place D+15.6 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +11.3 pts
Republican
Herbert Hoover1932
+55.4pts R vs U.S.
Place R+37.6 · U.S. D+17.8 · modeled estimate
Runner-up · Alf Landon, 1936 · +41.5 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.
With roughly 25,000 residents, Delaware's 9th House district posted a D+15.6 margin in the 2024 presidential race, signaling a electorate that has moved well outside competitive territory at the top of the ticket.
Across the recorded series it reached a Democratic high of 15.7 points in 2020 and a Republican high of 58.3 points in 1928. The 2024 margin was 15.6 points.
A population of 25,123, a 62% non-Hispanic-white share, and a median household income of $143,355 describe the district. The district's voting pattern over the last decade is most similar to that of State Representative District 27 and 18th Essex District.
The state-house 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 House District. Akashic. https://akashic.app/sld-lower/10009/. Accessed May 20, 2026. License: CC BY 4.0.