- Lead
- 2,859
- Total
- 30,524
- vs nation
- D+10.8
Wisconsin 66th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 3,460
- Total
- 30,155
- vs nation
- D+7.0
- Lead
- 3,167
- Total
- 26,806
- vs nation
- D+9.7
- Lead
- 5,970
- Total
- 29,784
- vs nation
- D+16.2
- Lead
- 6,949
- Total
- 29,240
- vs nation
- D+16.5
- Lead
- 3,650
- Total
- 28,941
- vs nation
- D+15.1
- Lead
- 3,401
- Total
- 25,358
- vs nation
- D+12.9
- Lead
- 5,706
- Total
- 22,743
- vs nation
- D+16.6
Key facts
- 2024 presidential margin
- D+9.4MIT Election Lab
- Population
- 59,3772024 5-year
- Population density
- 1,421 / sq mi2024 5-year · TIGER/Line
- Land area
- 41.8 sq miTIGER/Line
- Median household income
- $75,0232024 5-year
- White (non-Hispanic)
- 60.3%2024 5-year
- Black
- 16.4%2024 5-year
- Hispanic / Latino
- 16.5%2024 5-year
- Peak Democratic margin
- D+48.4 in 1936MIT Election Lab
- Peak Republican margin
- R+40.6 in 1920MIT Election Lab
- Most similar
- Assembly District 65, WI · twin score 88.4
presidential history
Party record book
Wisconsin 66th 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
71.1%
12,623 votes · D+42.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 70.7%
Republican
Warren G. Harding1920
63.7%
3,418 votes · R+40.6 · modeled estimate
Runner-up · William McKinley, 1900 · 50.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
17,907votes
61.2% of the vote · D+23.8 · modeled estimate
Runner-up · Barack Obama, 2012 · 17,719 votes
Republican
Donald Trump2024
13,573votes
44.5% of the vote · D+9.4 · modeled estimate
Runner-up · Donald Trump, 2020 · 13,092 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
Walter Mondale1984
+28.7pts D vs U.S.
Place D+10.5 · U.S. R+18.2 · modeled estimate
Runner-up · Michael Dukakis, 1988 · +28.5 pts
Republican
Warren G. Harding1920
+14.4pts R vs U.S.
Place R+40.6 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +11.7 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.
Wisconsin 66th State House District sits in the Upper Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 48.4 points in 1936 and a Republican high of 40.6 points in 1920. Between 2020 and 2024 the district moved 2.1 points toward the Republican candidate; the 2024 margin was 9.4 points.
A population of 59,377, a 60% non-Hispanic-white share, and a median household income of $75,023 describe the district. The district's voting pattern over the last decade is most similar to that of Assembly District 65 and Assembly District 64.
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 →
Wisconsin 66th State House District. Akashic. https://akashic.app/sld-lower/55066/. Accessed May 20, 2026. License: CC BY 4.0.