- Lead
- 11,712
- Total
- 44,925
- vs nation
- D+27.5
Connecticut 27th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 17,035
- Total
- 42,066
- vs nation
- D+36.0
- Lead
- 14,083
- Total
- 37,034
- vs nation
- D+35.9
- Lead
- 10,346
- Total
- 34,308
- vs nation
- D+26.3
- Lead
- 13,436
- Total
- 36,380
- vs nation
- D+29.7
- Lead
- 8,202
- Total
- 34,385
- vs nation
- D+26.3
- Lead
- 9,013
- Total
- 31,865
- vs nation
- D+27.8
- Lead
- 7,790
- Total
- 30,162
- vs nation
- D+17.3
Key facts
- 2024 presidential margin
- D+26.1MIT Election Lab
- Population
- 104,8352024 5-year
- Population density
- 6,131 / sq mi2024 5-year · TIGER/Line
- Land area
- 17.1 sq miTIGER/Line
- Median household income
- $107,9712024 5-year
- White (non-Hispanic)
- 43.4%2024 5-year
- Black
- 13.0%2024 5-year
- Hispanic / Latino
- 30.8%2024 5-year
- Peak Democratic margin
- D+40.5 in 2020MIT Election Lab
- Peak Republican margin
- R+29.5 in 1924MIT Election Lab
- Most similar
- State Senate District 22, CT · twin score 93.9
presidential history
Party record book
Connecticut 27th 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
Lyndon B. Johnson1964
70.0%
19,859 votes · D+40.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 69.6%
Republican
Dwight D. Eisenhower1956
60.9%
13,481 votes · R+21.7 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 57.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
29,268votes
69.6% of the vote · D+40.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 27,945 votes
Republican
Ronald Reagan1984
17,342votes
55.9% of the vote · R+12.4 · modeled estimate
Runner-up · Donald Trump, 2024 · 16,233 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 · Hillary Clinton, 2016 · +35.9 pts
Republican
Dwight D. Eisenhower1956
+6.3pts R vs U.S.
Place R+21.7 · U.S. R+15.4 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +4.3 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 | 61.7%28,414 | 38.3%17,660 | 46,074 |
| 2018 | D | 61.4%23,078 | 38.6%14,504 | 37,582 |
Connecticut 27th State Senate District sits in New England. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 40.5 points in 2020 and a Republican high of 29.5 points in 1924. Between 2020 and 2024 the district moved 14.4 points toward the Republican candidate; the 2024 margin was 26.1 points.
A population of 104,835, a 43% non-Hispanic-white share, and a median household income of $107,971 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 25.
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 →
Connecticut 27th State Senate District. Akashic. https://akashic.app/sld-upper/09027/. Accessed May 20, 2026. License: CC BY 4.0.