- Lead
- 10,000
- Total
- 45,050
- vs nation
- D+23.7
Connecticut 3rd State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 13,954
- Total
- 47,904
- vs nation
- D+24.7
- Lead
- 9,630
- Total
- 43,591
- vs nation
- D+20.0
- Lead
- 10,790
- Total
- 41,847
- vs nation
- D+21.9
- Lead
- 13,978
- Total
- 44,108
- vs nation
- D+24.4
- Lead
- 8,274
- Total
- 41,624
- vs nation
- D+22.3
- Lead
- 10,085
- Total
- 38,837
- vs nation
- D+25.4
- Lead
- 10,004
- Total
- 37,301
- vs nation
- D+18.3
Key facts
- 2024 presidential margin
- D+22.2MIT Election Lab
- Population
- 99,9642024 5-year
- Population density
- 1,118 / sq mi2024 5-year · TIGER/Line
- Land area
- 89.4 sq miTIGER/Line
- Median household income
- $91,2592024 5-year
- White (non-Hispanic)
- 50.2%2024 5-year
- Black
- 16.0%2024 5-year
- Hispanic / Latino
- 20.2%2024 5-year
- Peak Democratic margin
- D+47.4 in 1964MIT Election Lab
- Peak Republican margin
- R+40.2 in 1896MIT Election Lab
- Most similar
- State Senate District 13, CT · twin score 92.6
presidential history
Party record book
Connecticut 3rd 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
73.6%
24,646 votes · D+47.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 65.3%
Republican
William McKinley1896
67.7%
2,485 votes · R+40.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 62.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
30,523votes
63.7% of the vote · D+29.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 28,804 votes
Republican
Ronald Reagan1984
21,360votes
54.7% of the vote · R+9.7 · modeled estimate
Runner-up · Richard Nixon, 1972 · 19,532 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
Al Gore2000
+25.4pts D vs U.S.
Place D+26.0 · U.S. D+0.5 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +24.8 pts
Republican
William McKinley1896
+34.1pts R vs U.S.
Place R+40.2 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · +18.8 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 | 62.9%29,320 | 37.1%17,268 | 46,588 |
| 2018 | D | 63.4%23,090 | 36.6%13,301 | 36,391 |
The district recorded a Democratic presidential margin of D+22.2 in 2024, compared with D+31.7 in 2008. Catholic adherents were the largest religious group at 46.3% in the 2020 US Religion Census.
Across the recorded series it reached a Democratic high of 47.4 points in 1964 and a Republican high of 40.2 points in 1896. Between 2020 and 2024 the district moved 6.9 points toward the Republican candidate; the 2024 margin was 22.2 points.
A population of 99,964, a 50% non-Hispanic-white share, and a median household income of $91,259 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 13 and State Senate District 27.
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 3rd State Senate District. Akashic. https://akashic.app/sld-upper/09003/. Accessed May 20, 2026. License: CC BY 4.0.