- Lead
- 13,997
- Total
- 53,369
- vs nation
- D+27.7
Connecticut 4th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 17,209
- Total
- 56,151
- vs nation
- D+26.2
- Lead
- 10,246
- Total
- 49,322
- vs nation
- D+18.7
- Lead
- 11,502
- Total
- 47,009
- vs nation
- D+20.6
- Lead
- 15,052
- Total
- 49,544
- vs nation
- D+23.1
- Lead
- 8,603
- Total
- 46,908
- vs nation
- D+20.8
- Lead
- 10,750
- Total
- 44,126
- vs nation
- D+23.8
- Lead
- 10,680
- Total
- 43,191
- vs nation
- D+16.2
Key facts
- 2024 presidential margin
- D+26.2MIT Election Lab
- Population
- 102,8812024 5-year
- Population density
- 948 / sq mi2024 5-year · TIGER/Line
- Land area
- 109 sq miTIGER/Line
- Median household income
- $103,4312024 5-year
- White (non-Hispanic)
- 63.9%2024 5-year
- Black
- 9.5%2024 5-year
- Hispanic / Latino
- 12.6%2024 5-year
- Peak Democratic margin
- D+45.8 in 1964MIT Election Lab
- Peak Republican margin
- R+41.7 in 1896MIT Election Lab
- Most similar
- State Senate District 9, CT · twin score 91.2
presidential history
Party record book
Connecticut 4th 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
72.8%
27,449 votes · D+45.8 · modeled estimate
Runner-up · Joe Biden, 2020 · 64.5%
Republican
William McKinley1896
68.0%
2,882 votes · R+41.7 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 61.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
36,190votes
64.5% of the vote · D+30.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 33,156 votes
Republican
Ronald Reagan1984
24,544votes
55.4% of the vote · R+11.3 · modeled estimate
Runner-up · Richard Nixon, 1972 · 22,561 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
+27.7pts D vs U.S.
Place D+26.2 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +26.2 pts
Republican
William McKinley1896
+35.6pts R vs U.S.
Place R+41.7 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · +19.8 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 | 63.1%30,173 | 36.9%17,667 | 47,840 |
| 2018 | D | 63.5%23,691 | 36.5%13,627 | 37,318 |
Connecticut 4th State Senate District sits in New England. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 45.8 points in 1964 and a Republican high of 41.7 points in 1896. Between 2020 and 2024 the district moved 4.4 points toward the Republican candidate; the 2024 margin was 26.2 points.
A population of 102,881, a 64% non-Hispanic-white share, and a median household income of $103,431 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 9 and State Senate District 20.
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 4th State Senate District. Akashic. https://akashic.app/sld-upper/09004/. Accessed May 20, 2026. License: CC BY 4.0.