- Lead
- 4,838
- Total
- 16,681
- vs nation
- D+30.5
Delaware 12th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 5,041
- Total
- 16,828
- vs nation
- D+25.5
- Lead
- 2,865
- Total
- 15,194
- vs nation
- D+16.8
- Lead
- 3,380
- Total
- 14,533
- vs nation
- D+19.4
- Lead
- 4,451
- Total
- 14,701
- vs nation
- D+23.0
- Lead
- 1,461
- Total
- 14,183
- vs nation
- D+12.8
- Lead
- 1,464
- Total
- 12,551
- vs nation
- D+11.1
- Lead
- 1,135
- Total
- 10,676
- vs nation
- D+2.1
Key facts
- 2024 presidential margin
- D+29.0MIT Election Lab
- Population
- 25,1332024 5-year
- Population density
- 739 / sq mi2024 5-year · TIGER/Line
- Land area
- 34 sq miTIGER/Line
- Median household income
- $143,1782024 5-year
- White (non-Hispanic)
- 83.5%2024 5-year
- Black
- 3.0%2024 5-year
- Hispanic / Latino
- 4.3%2024 5-year
- Peak Democratic margin
- D+30.3 in 2008MIT Election Lab
- Peak Republican margin
- R+45.9 in 1928MIT Election Lab
- Most similar
- State Representative District 10, DE · twin score 92.7
presidential history
Party record book
Delaware 12th 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
Barack Obama2008
64.4%
9,466 votes · D+30.3 · modeled estimate
Runner-up · Joe Biden, 2020 · 64.3%
Republican
Herbert Hoover1928
72.8%
3,196 votes · R+45.9 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 65.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
10,828votes
64.3% of the vote · D+30.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 10,627 votes
Republican
Ronald Reagan1984
6,886votes
62.8% of the vote · R+26.0 · modeled estimate
Runner-up · Richard Nixon, 1972 · 6,774 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
+30.5pts D vs U.S.
Place D+29.0 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +25.5 pts
Republican
Herbert Hoover1932
+38.7pts R vs U.S.
Place R+20.9 · U.S. D+17.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +28.4 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 a 2024 presidential margin of D+28.9, this Wilmington-area district anchors the Democratic bloc in Dover, making it a reliable base rather than a competitive battleground.
Across the recorded series it reached a Democratic high of 30.3 points in 2008 and a Republican high of 45.9 points in 1928. Between 2020 and 2024 the district moved 1.0 points toward the Republican candidate; the 2024 margin was 29.0 points.
A population of 25,133, a 84% non-Hispanic-white share, and a median household income of $143,178 describe the district. The district's voting pattern over the last decade is most similar to that of State Representative District 10 and State House District 31.
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 12th State House District. Akashic. https://akashic.app/sld-lower/10012/. Accessed May 20, 2026. License: CC BY 4.0.