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 representation
Current officeholders
DMartha MarxState Senate · 20
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
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.
Akashic
Political twins — state-senate districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Connecticut 20th State Senate District. Akashic. https://akashic.app/sld-upper/09020/. Accessed May 20, 2026. License: CC BY 4.0.
How did Connecticut 20th State Senate District vote in 2024?
In 2024, Connecticut 20th State Senate District voted Democratic by 18.0 points (D+18.0), carried by the Democratic candidate. Out of 50,867 votes cast, 29,588 went Democratic and 20,407 went Republican.
When did Connecticut 20th State Senate District last vote Republican?
The most recent presidential election in which Connecticut 20th State Senate District voted Republican was 1984.
How many people live in Connecticut 20th State Senate District?
Connecticut 20th State Senate District has a population of 96,136 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Connecticut 20th State Senate District?
Median household income in Connecticut 20th State Senate District is $91,657 — above the national median of $80,734. The Connecticut state median is $95,781.
What is the political history of Connecticut 20th State Senate District?
Akashic tracks 38 presidential elections in Connecticut 20th State Senate District from 1876 to 2024. Of those, 25 went Democratic and 13 went Republican.