- Lead
- 1,669
- Total
- 12,286
- vs nation
- R+12.1
Connecticut 78th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,679
- Total
- 12,980
- vs nation
- R+17.4
- Lead
- 2,357
- Total
- 11,395
- vs nation
- R+22.8
- Lead
- 1,596
- Total
- 10,783
- vs nation
- R+18.7
- Lead
- 866
- Total
- 11,230
- vs nation
- R+15.0
- Lead
- 2,151
- Total
- 11,224
- vs nation
- R+16.7
- Lead
- 1,075
- Total
- 9,946
- vs nation
- R+11.3
- Lead
- 616
- Total
- 9,213
- vs nation
- R+15.2
Key facts
- 2024 presidential margin
- R+13.6MIT Election Lab
- Population
- 24,0112024 5-year
- Population density
- 828 / sq mi2024 5-year · TIGER/Line
- Land area
- 29 sq miTIGER/Line
- Median household income
- $89,6582024 5-year
- White (non-Hispanic)
- 80.0%2024 5-year
- Black
- 3.0%2024 5-year
- Hispanic / Latino
- 10.4%2024 5-year
- Peak Democratic margin
- D+14.8 in 1964MIT Election Lab
- Peak Republican margin
- R+61.5 in 1896MIT Election Lab
- Most similar
- State House District 77, CT · twin score 92.8
presidential history
Party record book
Connecticut 78th 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
57.4%
4,330 votes · D+14.8 · modeled estimate
Runner-up · Barack Obama, 2008 · 45.7%
Republican
William McKinley1896
79.2%
1,083 votes · R+61.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 75.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
5,527votes
42.6% of the vote · R+12.9 · modeled estimate
Runner-up · Kamala Harris, 2024 · 5,218 votes
Republican
Ronald Reagan1984
7,810votes
72.2% of the vote · R+44.8 · modeled estimate
Runner-up · Donald Trump, 2020 · 7,206 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
Lyndon B. Johnson1964
−7.8pts D vs U.S.
Place D+14.8 · U.S. D+22.6 · modeled estimate
Runner-up · Al Gore, 2000 · −11.3 pts
Republican
William McKinley1896
+55.4pts R vs U.S.
Place R+61.5 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +50.5 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 | 54.8%6,613 | 45.2%5,449 | 12,062 |
| 2018 | D | 55.4%5,244 | 44.6%4,217 | 9,461 |
District 78 recorded a 13.6-point Republican presidential margin in 2024, making it an outlier in a state that trended Democratic statewide. Its small population of roughly 24,000 reflects a compact, homogeneous constituency.
Across the recorded series it reached a Democratic high of 14.8 points in 1964 and a Republican high of 61.5 points in 1896. Between 2020 and 2024 the district moved 0.6 points toward the Republican candidate; the 2024 margin was 13.6 points.
A population of 24,011, a 80% non-Hispanic-white share, and a median household income of $89,658 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 77 and State House District 22.
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 78th State House District. Akashic. https://akashic.app/sld-lower/09078/. Accessed May 20, 2026. License: CC BY 4.0.