- Lead
- 3,464
- Total
- 10,838
- vs nation
- D+33.4
Connecticut 12th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,902
- Total
- 12,108
- vs nation
- D+36.0
- Lead
- 2,886
- Total
- 10,392
- vs nation
- D+25.7
- Lead
- 3,081
- Total
- 9,971
- vs nation
- D+27.0
- Lead
- 3,857
- Total
- 10,542
- vs nation
- D+29.3
- Lead
- 2,436
- Total
- 9,859
- vs nation
- D+27.2
- Lead
- 2,879
- Total
- 9,398
- vs nation
- D+30.1
- Lead
- 2,781
- Total
- 9,243
- vs nation
- D+21.6
Key facts
- 2024 presidential margin
- D+32.0MIT Election Lab
- Population
- 24,2752024 5-year
- Population density
- 3,153 / sq mi2024 5-year · TIGER/Line
- Land area
- 7.7 sq miTIGER/Line
- Median household income
- $86,6272024 5-year
- White (non-Hispanic)
- 52.8%2024 5-year
- Black
- 16.0%2024 5-year
- Hispanic / Latino
- 18.3%2024 5-year
- Peak Democratic margin
- D+50.5 in 1964MIT Election Lab
- Peak Republican margin
- R+35.0 in 1896MIT Election Lab
- Most similar
- State House District 56, CT · twin score 93.0
presidential history
Party record book
Connecticut 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
Lyndon B. Johnson1964
75.2%
6,359 votes · D+50.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 69.4%
Republican
William McKinley1896
65.6%
580 votes · R+35.0 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 59.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
8,409votes
69.4% of the vote · D+40.5 · modeled estimate
Runner-up · Barack Obama, 2008 · 7,125 votes
Republican
Ronald Reagan1984
4,878votes
52.1% of the vote · R+4.5 · modeled estimate
Runner-up · Richard Nixon, 1972 · 4,551 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
Joe Biden2020
+36.0pts D vs U.S.
Place D+40.5 · U.S. D+4.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · +33.4 pts
Republican
William McKinley1896
+28.9pts R vs U.S.
Place R+35.0 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · +15.0 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.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | D | 63.4%7,118 | 36.6%4,105 | 11,223 |
| 2018 | D | 63.6%5,546 | 36.4%3,177 | 8,723 |
The district recorded a Democratic presidential margin of D+32.0 in 2024, compared with D+36.6 in 2008. Catholic adherents were the largest religious group at 46.1% in the 2020 US Religion Census.
Across the recorded series it reached a Democratic high of 50.5 points in 1964 and a Republican high of 35.0 points in 1896. Between 2020 and 2024 the district moved 8.5 points toward the Republican candidate; the 2024 margin was 32.0 points.
A population of 24,275, a 53% non-Hispanic-white share, and a median household income of $86,627 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 56 and State House District 13.
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 →
Connecticut 12th State House District. Akashic. https://akashic.app/sld-lower/09012/. Accessed May 20, 2026. License: CC BY 4.0.