- Lead
- 9,181
- Total
- 50,867
- vs nation
- D+19.5
Connecticut 20th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 11,243
- Total
- 52,198
- vs nation
- D+17.1
- Lead
- 5,629
- Total
- 46,360
- vs nation
- D+10.1
- Lead
- 10,276
- Total
- 43,688
- vs nation
- D+19.7
- Lead
- 12,574
- Total
- 47,399
- vs nation
- D+19.3
- Lead
- 8,544
- Total
- 44,991
- vs nation
- D+21.4
- Lead
- 9,446
- Total
- 41,149
- vs nation
- D+22.4
- Lead
- 9,931
- Total
- 38,532
- vs nation
- D+17.3
Key facts
- 2024 presidential margin
- D+18.0MIT Election Lab
- Population
- 96,1362024 5-year
- Population density
- 521 / sq mi2024 5-year · TIGER/Line
- Land area
- 185 sq miTIGER/Line
- Median household income
- $91,6572024 5-year
- White (non-Hispanic)
- 71.1%2024 5-year
- Black
- 6.0%2024 5-year
- Hispanic / Latino
- 14.2%2024 5-year
- Peak Democratic margin
- D+43.0 in 1964MIT Election Lab
- Peak Republican margin
- R+28.0 in 1924MIT Election Lab
- Most similar
- State Senate District 19, CT · twin score 94.2
presidential history
Party record book
Connecticut 20th 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
71.4%
21,477 votes · D+43.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 62.7%
Republican
Warren G. Harding1920
60.7%
6,054 votes · R+24.5 · modeled estimate
Runner-up · Richard Nixon, 1972 · 60.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
31,234votes
59.8% of the vote · D+21.5 · modeled estimate
Runner-up · Barack Obama, 2008 · 29,727 votes
Republican
Ronald Reagan1984
22,224votes
58.8% of the vote · R+18.0 · modeled estimate
Runner-up · Richard Nixon, 1972 · 20,466 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
+22.4pts D vs U.S.
Place D+23.0 · U.S. D+0.5 · modeled estimate
Runner-up · John Kerry, 2004 · +21.4 pts
Republican
William McKinley1896
+15.1pts R vs U.S.
Place R+21.2 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +12.4 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 | 63.0%26,128 | 37.0%15,341 | 41,469 |
| 2018 | D | 65.9%23,205 | 34.1%12,028 | 35,233 |
Connecticut 20th State Senate District sits in New England. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 43.0 points in 1964 and a Republican high of 28.0 points in 1924. Between 2020 and 2024 the district moved 3.5 points toward the Republican candidate; the 2024 margin was 18.0 points.
A population of 96,136, a 71% non-Hispanic-white share, and a median household income of $91,657 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 9.
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 20th State Senate District. Akashic. https://akashic.app/sld-upper/09020/. Accessed May 20, 2026. License: CC BY 4.0.