- Lead
- 6,658
- Total
- 44,341
- vs nation
- D+16.5
Connecticut 13th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 9,671
- Total
- 48,667
- vs nation
- D+15.4
- Lead
- 6,285
- Total
- 43,243
- vs nation
- D+12.4
- Lead
- 10,008
- Total
- 41,038
- vs nation
- D+20.5
- Lead
- 11,508
- Total
- 43,371
- vs nation
- D+19.3
- Lead
- 6,177
- Total
- 41,626
- vs nation
- D+17.3
- Lead
- 9,376
- Total
- 38,846
- vs nation
- D+23.6
- Lead
- 8,976
- Total
- 37,483
- vs nation
- D+15.4
Key facts
- 2024 presidential margin
- D+15.0MIT Election Lab
- Population
- 98,6842024 5-year
- Population density
- 1,443 / sq mi2024 5-year · TIGER/Line
- Land area
- 68.4 sq miTIGER/Line
- Median household income
- $82,8902024 5-year
- White (non-Hispanic)
- 59.7%2024 5-year
- Black
- 8.0%2024 5-year
- Hispanic / Latino
- 25.2%2024 5-year
- Peak Democratic margin
- D+40.4 in 1964MIT Election Lab
- Peak Republican margin
- R+25.5 in 1924MIT Election Lab
- Most similar
- State Senate District 17, CT · twin score 94.0
presidential history
Party record book
Connecticut 13th 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
70.1%
23,173 votes · D+40.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 62.6%
Republican
Dwight D. Eisenhower1956
61.9%
18,956 votes · R+23.8 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 59.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
28,780votes
59.1% of the vote · D+19.9 · modeled estimate
Runner-up · Barack Obama, 2008 · 27,139 votes
Republican
Ronald Reagan1984
22,110votes
58.0% of the vote · R+16.6 · modeled estimate
Runner-up · Richard Nixon, 1972 · 20,526 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
+23.6pts D vs U.S.
Place D+24.1 · U.S. D+0.5 · modeled estimate
Runner-up · Barack Obama, 2012 · +20.5 pts
Republican
William McKinley1896
+13.1pts R vs U.S.
Place R+19.1 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · +12.3 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 | 58.2%24,386 | 41.8%17,487 | 41,873 |
| 2018 | D | 60.5%22,120 | 39.5%14,418 | 36,538 |
In 2024 it voted Democratic by D+15.0, against D+26.5 in 2008. About 72,400 residents lived here, with White alone at 65.3% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 40.4 points in 1964 and a Republican high of 25.5 points in 1924. Between 2020 and 2024 the district moved 4.9 points toward the Republican candidate; the 2024 margin was 15.0 points.
A population of 98,684, a 60% non-Hispanic-white share, and a median household income of $82,890 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 17 and State Senate District 3.
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 13th State Senate District. Akashic. https://akashic.app/sld-upper/09013/. Accessed May 20, 2026. License: CC BY 4.0.