- Lead
- 2,663
- Total
- 10,379
- vs nation
- D+27.1
Connecticut 40th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,287
- Total
- 9,711
- vs nation
- D+19.1
- Lead
- 1,243
- Total
- 8,504
- vs nation
- D+12.5
- Lead
- 2,098
- Total
- 7,912
- vs nation
- D+22.7
- Lead
- 2,508
- Total
- 8,599
- vs nation
- D+21.9
- Lead
- 1,779
- Total
- 8,132
- vs nation
- D+24.3
- Lead
- 1,889
- Total
- 7,600
- vs nation
- D+24.3
- Lead
- 1,959
- Total
- 7,380
- vs nation
- D+18.0
Key facts
- 2024 presidential margin
- D+25.7MIT Election Lab
- Population
- 24,4362024 5-year
- Population density
- 1,350 / sq mi2024 5-year · TIGER/Line
- Land area
- 18.1 sq miTIGER/Line
- Median household income
- $87,3302024 5-year
- White (non-Hispanic)
- 69.8%2024 5-year
- Black
- 6.3%2024 5-year
- Hispanic / Latino
- 11.2%2024 5-year
- Peak Democratic margin
- D+45.3 in 1964MIT Election Lab
- Peak Republican margin
- R+24.8 in 1924MIT Election Lab
- Most similar
- State House District 88, CT · twin score 92.3
presidential history
Party record book
Connecticut 40th 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
72.6%
3,998 votes · D+45.3 · modeled estimate
Runner-up · Barack Obama, 2008 · 63.8%
Republican
Richard Nixon1972
59.1%
3,593 votes · R+19.5 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 58.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
6,414votes
61.8% of the vote · D+25.7 · modeled estimate
Runner-up · Joe Biden, 2020 · 5,867 votes
Republican
Ronald Reagan1984
3,878votes
57.4% of the vote · R+15.3 · modeled estimate
Runner-up · Donald Trump, 2024 · 3,751 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
+27.1pts D vs U.S.
Place D+25.7 · U.S. R+1.5 · modeled estimate
Runner-up · Al Gore, 2000 · +24.3 pts
Republican
William McKinley1896
+12.6pts R vs U.S.
Place R+18.7 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +9.7 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 | 63.3%6,604 | 36.7%3,829 | 10,433 |
| 2018 | D | 66.2%5,867 | 33.8%2,991 | 8,858 |
With a 2024 presidential margin of D+25.7 in a state that already leans Democratic, District 40 ranks among the state's most reliably blue constituencies, suggesting a dense urban or inner-suburban core with a highly educated or minority-majority electorate.
Across the recorded series it reached a Democratic high of 45.3 points in 1964 and a Republican high of 24.8 points in 1924. Between 2020 and 2024 the district moved 2.1 points toward the Democratic candidate; the 2024 margin was 25.7 points.
A population of 24,436, a 70% non-Hispanic-white share, and a median household income of $87,330 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 88 and State House District 20.
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 40th State House District. Akashic. https://akashic.app/sld-lower/09040/. Accessed May 20, 2026. License: CC BY 4.0.