- Lead
- 2,217
- Total
- 12,150
- vs nation
- D+19.7
Connecticut 121st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,202
- Total
- 11,216
- vs nation
- D+33.0
- Lead
- 2,988
- Total
- 9,781
- vs nation
- D+28.5
- Lead
- 2,008
- Total
- 9,122
- vs nation
- D+18.2
- Lead
- 2,825
- Total
- 9,592
- vs nation
- D+22.2
- Lead
- 1,425
- Total
- 9,116
- vs nation
- D+18.1
- Lead
- 1,716
- Total
- 8,494
- vs nation
- D+19.7
- Lead
- 1,478
- Total
- 8,000
- vs nation
- D+10.0
Key facts
- 2024 presidential margin
- D+18.2MIT Election Lab
- Population
- 23,6872024 5-year
- Population density
- 3,589 / sq mi2024 5-year · TIGER/Line
- Land area
- 6.6 sq miTIGER/Line
- Median household income
- $83,3532024 5-year
- White (non-Hispanic)
- 38.8%2024 5-year
- Black
- 25.4%2024 5-year
- Hispanic / Latino
- 27.6%2024 5-year
- Peak Democratic margin
- D+37.5 in 2020MIT Election Lab
- Peak Republican margin
- R+35.9 in 1924MIT Election Lab
- Most similar
- State House District 145, CT · twin score 95.0
presidential history
Party record book
Connecticut 121st State House 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
Joe Biden2020
68.1%
7,639 votes · D+37.5 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 66.2%
Republican
Dwight D. Eisenhower1956
65.0%
4,017 votes · R+30.1 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 62.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
7,639votes
68.1% of the vote · D+37.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 7,106 votes
Republican
Ronald Reagan1984
5,174votes
60.5% of the vote · R+21.1 · modeled estimate
Runner-up · Donald Trump, 2024 · 4,889 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
Joe Biden2020
+33.0pts D vs U.S.
Place D+37.5 · U.S. D+4.5 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +28.5 pts
Republican
Dwight D. Eisenhower1956
+14.7pts R vs U.S.
Place R+30.1 · U.S. R+15.4 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +12.1 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 | 61.7%6,420 | 38.3%3,990 | 10,410 |
| 2018 | D | 61.4%5,214 | 38.6%3,277 | 8,491 |
With a 2024 presidential margin of D+18.2 in a state that already leans Democratic, District 121's roughly 24,000 residents have delivered reliable double-digit margins, signaling a dense, urban-oriented electorate with limited recent competitive pressure.
Across the recorded series it reached a Democratic high of 37.5 points in 2020 and a Republican high of 35.9 points in 1924. Between 2020 and 2024 the district moved 19.2 points toward the Republican candidate; the 2024 margin was 18.2 points.
A population of 23,687, a 39% non-Hispanic-white share, and a median household income of $83,353 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 145 and State House District 110.
The state-house 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 121st State House District. Akashic. https://akashic.app/sld-lower/09121/. Accessed May 20, 2026. License: CC BY 4.0.