- Lead
- 1,421
- Total
- 16,235
- vs nation
- D+10.2
Connecticut 55th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,645
- Total
- 16,632
- vs nation
- D+5.4
- Lead
- 235
- Total
- 14,726
- vs nation
- R+0.5
- Lead
- 948
- Total
- 13,724
- vs nation
- D+3.1
- Lead
- 2,082
- Total
- 14,403
- vs nation
- D+7.2
- Lead
- 442
- Total
- 13,892
- vs nation
- D+5.6
- Lead
- 1,003
- Total
- 12,396
- vs nation
- D+7.6
- Lead
- 1,346
- Total
- 11,754
- vs nation
- D+2.9
Key facts
- 2024 presidential margin
- D+8.8MIT Election Lab
- Population
- 24,7462024 5-year
- Population density
- 262 / sq mi2024 5-year · TIGER/Line
- Land area
- 94.5 sq miTIGER/Line
- Median household income
- $148,1032024 5-year
- White (non-Hispanic)
- 87.4%2024 5-year
- Black
- 1.1%2024 5-year
- Hispanic / Latino
- 4.3%2024 5-year
- Peak Democratic margin
- D+30.6 in 1964MIT Election Lab
- Peak Republican margin
- R+54.7 in 1896MIT Election Lab
- Most similar
- State House District 62, CT · twin score 93.4
presidential history
Party record book
Connecticut 55th 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
65.2%
5,268 votes · D+30.6 · modeled estimate
Runner-up · Barack Obama, 2008 · 56.4%
Republican
William McKinley1896
73.1%
884 votes · R+54.7 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 68.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
8,959votes
53.9% of the vote · D+9.9 · modeled estimate
Runner-up · Kamala Harris, 2024 · 8,697 votes
Republican
Ronald Reagan1984
7,749votes
64.5% of the vote · R+29.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 7,314 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
+10.2pts D vs U.S.
Place D+8.8 · U.S. R+1.5 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +8.0 pts
Republican
William McKinley1896
+48.6pts R vs U.S.
Place R+54.7 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +34.8 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 | 60.8%7,266 | 39.2%4,683 | 11,949 |
| 2018 | D | 62.9%6,000 | 37.1%3,536 | 9,536 |
Its 2024 presidential margin of D+8.8 ranked among Connecticut's closest, against D+14.5 in 2008. Catholic adherents were the largest religious group at 46.9% in the 2020 US Religion Census.
Across the recorded series it reached a Democratic high of 30.6 points in 1964 and a Republican high of 54.7 points in 1896. Between 2020 and 2024 the district moved 1.1 points toward the Republican candidate; the 2024 margin was 8.8 points.
A population of 24,746, a 87% non-Hispanic-white share, and a median household income of $148,103 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 62 and State House District 28.
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 55th State House District. Akashic. https://akashic.app/sld-lower/09055/. Accessed May 20, 2026. License: CC BY 4.0.