- Lead
- 6,919
- Total
- 26,933
- vs nation
- D+27.2
Delaware 12th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 7,827
- Total
- 26,375
- vs nation
- D+25.2
- Lead
- 4,818
- Total
- 21,973
- vs nation
- D+19.8
- Lead
- 5,541
- Total
- 21,148
- vs nation
- D+22.3
- Lead
- 7,100
- Total
- 21,417
- vs nation
- D+25.9
- Lead
- 2,781
- Total
- 20,490
- vs nation
- D+16.0
- Lead
- 2,689
- Total
- 17,910
- vs nation
- D+14.5
- Lead
- 2,076
- Total
- 14,943
- vs nation
- D+5.4
Key facts
- 2024 presidential margin
- D+25.7MIT Election Lab
- Population
- 47,2732024 5-year
- Population density
- 664 / sq mi2024 5-year · TIGER/Line
- Land area
- 71.2 sq miTIGER/Line
- Median household income
- $110,9762024 5-year
- White (non-Hispanic)
- 53.6%2024 5-year
- Black
- 27.6%2024 5-year
- Hispanic / Latino
- 7.0%2024 5-year
- Peak Democratic margin
- D+33.2 in 2008MIT Election Lab
- Peak Republican margin
- R+43.0 in 1928MIT Election Lab
- Most similar
- State Senate District 10, DE · twin score 93.3
presidential history
Party record book
Delaware 12th 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
66.1%
14,147 votes · D+33.2 · modeled estimate
Runner-up · Joe Biden, 2020 · 64.1%
Republican
Herbert Hoover1928
71.3%
4,483 votes · R+43.0 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 66.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
16,904votes
64.1% of the vote · D+29.7 · modeled estimate
Runner-up · Kamala Harris, 2024 · 16,727 votes
Republican
Donald Trump2024
9,808votes
36.4% of the vote · D+25.7 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 9,696 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
+27.2pts D vs U.S.
Place D+25.7 · U.S. R+1.5 · modeled estimate
Runner-up · Barack Obama, 2008 · +25.9 pts
Republican
Herbert Hoover1932
+35.6pts R vs U.S.
Place R+17.8 · U.S. D+17.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +25.5 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 12th State Senate District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 33.2 points in 2008 and a Republican high of 43.0 points in 1928. Between 2020 and 2024 the district moved 4.0 points toward the Republican candidate; the 2024 margin was 25.7 points.
A population of 47,273, a 54% non-Hispanic-white share, and a median household income of $110,976 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 10 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 12th State Senate District. Akashic. https://akashic.app/sld-upper/10012/. Accessed May 20, 2026. License: CC BY 4.0.