- Lead
- 3,193
- Total
- 11,020
- vs nation
- D+30.4
Connecticut 100th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 3,865
- Total
- 11,994
- vs nation
- D+27.8
- Lead
- 2,828
- Total
- 11,028
- vs nation
- D+23.6
- Lead
- 3,631
- Total
- 10,536
- vs nation
- D+30.6
- Lead
- 4,522
- Total
- 11,154
- vs nation
- D+33.3
- Lead
- 3,478
- Total
- 10,610
- vs nation
- D+35.2
- Lead
- 3,441
- Total
- 9,861
- vs nation
- D+34.4
- Lead
- 3,247
- Total
- 9,308
- vs nation
- D+26.4
Key facts
- 2024 presidential margin
- D+29.0MIT Election Lab
- Population
- 23,8702024 5-year
- Population density
- 951 / sq mi2024 5-year · TIGER/Line
- Land area
- 25.1 sq miTIGER/Line
- Median household income
- $77,7502024 5-year
- White (non-Hispanic)
- 63.7%2024 5-year
- Black
- 13.6%2024 5-year
- Hispanic / Latino
- 12.7%2024 5-year
- Peak Democratic margin
- D+51.1 in 1964MIT Election Lab
- Peak Republican margin
- R+22.8 in 1896MIT Election Lab
- Most similar
- State House District 33, CT · twin score 93.5
presidential history
Party record book
Connecticut 100th 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
Lyndon B. Johnson1964
75.5%
4,451 votes · D+51.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 69.3%
Republican
William McKinley1896
57.8%
557 votes · R+22.8 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 55.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
7,826votes
65.2% of the vote · D+32.2 · modeled estimate
Runner-up · Barack Obama, 2008 · 7,730 votes
Republican
Donald Trump2020
3,961votes
33.0% of the vote · D+32.2 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 3,857 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
John Kerry2004
+35.2pts D vs U.S.
Place D+32.8 · U.S. R+2.5 · modeled estimate
Runner-up · Al Gore, 2000 · +34.4 pts
Republican
William McKinley1896
+16.7pts R vs U.S.
Place R+22.8 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +5.5 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 | 58.0%7,252 | 42.0%5,257 | 12,509 |
| 2018 | D | 59.5%6,394 | 40.5%4,356 | 10,750 |
With a 2024 presidential margin of D+28.9, this district ranks among the most reliably blue constituencies in Connecticut's lower chamber, suggesting dense urban or heavily college-educated voter concentrations anchor its electoral pattern.
Across the recorded series it reached a Democratic high of 51.1 points in 1964 and a Republican high of 22.8 points in 1896. Between 2020 and 2024 the district moved 3.2 points toward the Republican candidate; the 2024 margin was 29.0 points.
A population of 23,870, a 64% non-Hispanic-white share, and a median household income of $77,750 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 33 and State House District 13.
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 100th State House District. Akashic. https://akashic.app/sld-lower/09100/. Accessed May 20, 2026. License: CC BY 4.0.