- Lead
- 6,751
- Total
- 13,490
- vs nation
- D+51.5
Connecticut 18th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 7,528
- Total
- 12,915
- vs nation
- D+53.8
- Lead
- 6,551
- Total
- 12,099
- vs nation
- D+52.1
- Lead
- 6,814
- Total
- 11,815
- vs nation
- D+53.8
- Lead
- 7,767
- Total
- 12,619
- vs nation
- D+54.3
- Lead
- 6,034
- Total
- 11,430
- vs nation
- D+55.2
- Lead
- 6,169
- Total
- 11,025
- vs nation
- D+55.4
- Lead
- 5,784
- Total
- 10,816
- vs nation
- D+45.0
Key facts
- 2024 presidential margin
- D+50.0MIT Election Lab
- Population
- 24,3712024 5-year
- Population density
- 4,974 / sq mi2024 5-year · TIGER/Line
- Land area
- 4.9 sq miTIGER/Line
- Median household income
- $115,3692024 5-year
- White (non-Hispanic)
- 69.2%2024 5-year
- Black
- 6.8%2024 5-year
- Hispanic / Latino
- 10.9%2024 5-year
- Peak Democratic margin
- D+71.4 in 1964MIT Election Lab
- Peak Republican margin
- R+4.1 in 1896MIT Election Lab
- Most similar
- State House District 13, CT · twin score 92.0
presidential history
Party record book
Connecticut 18th 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
85.6%
9,038 votes · D+71.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 80.1%
Republican
William McKinley1896
49.7%
411 votes · R+4.1 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 44.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
10,134votes
78.5% of the vote · D+58.3 · modeled estimate
Runner-up · Barack Obama, 2008 · 10,107 votes
Republican
Ronald Reagan1984
3,502votes
35.4% of the vote · D+28.8 · modeled estimate
Runner-up · Richard Nixon, 1972 · 3,270 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
George McGovern1972
+56.4pts D vs U.S.
Place D+33.3 · U.S. R+23.2 · modeled estimate
Runner-up · Al Gore, 2000 · +55.4 pts
Republican
William McKinley1896
−2.0pts R vs U.S.
Place R+4.1 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · −8.2 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%7,146 | 36.6%4,121 | 11,267 |
| 2018 | D | 63.6%5,568 | 36.4%3,190 | 8,758 |
With a 2024 presidential margin of D+50.1, this district ranks among the most lopsided in the state, suggesting a dense urban or college-town core where one coalition commands overwhelming structural advantages.
Across the recorded series it reached a Democratic high of 71.4 points in 1964 and a Republican high of 4.1 points in 1896. Between 2020 and 2024 the district moved 8.2 points toward the Republican candidate; the 2024 margin was 50.0 points.
A population of 24,371, a 69% non-Hispanic-white share, and a median household income of $115,369 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 13 and State House District 91.
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 18th State House District. Akashic. https://akashic.app/sld-lower/09018/. Accessed May 20, 2026. License: CC BY 4.0.