- Lead
- 21,021
- Total
- 55,817
- vs nation
- D+39.1
Connecticut 5th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 22,775
- Total
- 57,862
- vs nation
- D+34.9
- Lead
- 17,337
- Total
- 52,493
- vs nation
- D+30.9
- Lead
- 18,540
- Total
- 50,808
- vs nation
- D+32.6
- Lead
- 22,333
- Total
- 53,697
- vs nation
- D+34.3
- Lead
- 15,110
- Total
- 50,177
- vs nation
- D+32.6
- Lead
- 16,900
- Total
- 47,565
- vs nation
- D+35.0
- Lead
- 16,198
- Total
- 46,436
- vs nation
- D+26.4
Key facts
- 2024 presidential margin
- D+37.7MIT Election Lab
- Population
- 98,9832024 5-year
- Population density
- 1,239 / sq mi2024 5-year · TIGER/Line
- Land area
- 79.9 sq miTIGER/Line
- Median household income
- $135,2942024 5-year
- White (non-Hispanic)
- 71.4%2024 5-year
- Black
- 5.2%2024 5-year
- Hispanic / Latino
- 9.2%2024 5-year
- Peak Democratic margin
- D+54.8 in 1964MIT Election Lab
- Peak Republican margin
- R+30.3 in 1896MIT Election Lab
- Most similar
- State Senate District 4, CT · twin score 87.1
presidential history
Party record book
Connecticut 5th 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
77.3%
33,643 votes · D+54.8 · modeled estimate
Runner-up · Barack Obama, 2008 · 70.1%
Republican
William McKinley1896
62.5%
2,683 votes · R+30.3 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 56.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
39,874votes
68.9% of the vote · D+39.4 · modeled estimate
Runner-up · Kamala Harris, 2024 · 37,867 votes
Republican
Ronald Reagan1984
22,981votes
49.1% of the vote · D+1.4 · modeled estimate
Runner-up · Richard Nixon, 1972 · 21,431 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
+39.1pts D vs U.S.
Place D+37.7 · U.S. R+1.5 · modeled estimate
Runner-up · Al Gore, 2000 · +35.0 pts
Republican
William McKinley1896
+24.2pts R vs U.S.
Place R+30.3 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · +11.6 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%29,025 | 36.6%16,739 | 45,764 |
| 2018 | D | 63.6%22,614 | 36.4%12,956 | 35,570 |
Covering parts of the Naugatuck Valley and surrounding towns, this district backed the Republican presidential candidate by 8 points in 2024, making it a rare GOP-leaning pocket in a state that trended Democratic statewide.
Across the recorded series it reached a Democratic high of 54.8 points in 1964 and a Republican high of 30.3 points in 1896. Between 2020 and 2024 the district moved 1.7 points toward the Republican candidate; the 2024 margin was 37.7 points.
A population of 98,983, a 71% non-Hispanic-white share, and a median household income of $135,294 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 4 and State Senate District 29.
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 5th State Senate District. Akashic. https://akashic.app/sld-upper/09005/. Accessed May 20, 2026. License: CC BY 4.0.