- Lead
- 1,100
- Total
- 14,397
- vs nation
- R+6.2
Connecticut 30th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 436
- Total
- 14,583
- vs nation
- R+7.4
- Lead
- 1,393
- Total
- 13,097
- vs nation
- R+12.7
- Lead
- 1,064
- Total
- 12,510
- vs nation
- R+12.4
- Lead
- 301
- Total
- 12,918
- vs nation
- R+9.6
- Lead
- 1,967
- Total
- 12,943
- vs nation
- R+12.7
- Lead
- 864
- Total
- 11,708
- vs nation
- R+7.9
- Lead
- 527
- Total
- 11,316
- vs nation
- R+13.2
Key facts
- 2024 presidential margin
- R+7.6MIT Election Lab
- Population
- 23,4352024 5-year
- Population density
- 989 / sq mi2024 5-year · TIGER/Line
- Land area
- 23.7 sq miTIGER/Line
- Median household income
- $109,9722024 5-year
- White (non-Hispanic)
- 85.6%2024 5-year
- Black
- 1.4%2024 5-year
- Hispanic / Latino
- 5.8%2024 5-year
- Peak Democratic margin
- D+14.3 in 1964MIT Election Lab
- Peak Republican margin
- R+64.3 in 1896MIT Election Lab
- Most similar
- State House District 81, CT · twin score 99.5
presidential history
Party record book
Connecticut 30th 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
57.0%
5,565 votes · D+14.3 · modeled estimate
Runner-up · Barack Obama, 2008 · 48.2%
Republican
William McKinley1896
80.0%
1,158 votes · R+64.3 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 75.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
6,982votes
47.9% of the vote · R+3.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 6,530 votes
Republican
Ronald Reagan1984
9,809votes
71.2% of the vote · R+42.8 · modeled estimate
Runner-up · Richard Nixon, 1972 · 9,128 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
Kamala Harris2024
−6.2pts D vs U.S.
Place R+7.6 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · −7.4 pts
Republican
William McKinley1896
+58.2pts R vs U.S.
Place R+64.3 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +49.8 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 | 63.4%6,872 | 36.6%3,963 | 10,835 |
| 2018 | D | 63.6%5,354 | 36.4%3,067 | 8,421 |
Connecticut House District 30 runs against the state's overall Democratic lean, posting a notable Republican presidential margin in 2024. Its competitive edge makes it a consistent target for both parties in legislative cycles.
Across the recorded series it reached a Democratic high of 14.3 points in 1964 and a Republican high of 64.3 points in 1896. Between 2020 and 2024 the district moved 4.7 points toward the Republican candidate; the 2024 margin was 7.6 points.
A population of 23,435, a 86% non-Hispanic-white share, and a median household income of $109,972 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 81 and State House District 52.
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 30th State House District. Akashic. https://akashic.app/sld-lower/09030/. Accessed May 20, 2026. License: CC BY 4.0.