- Lead
- 19,855
- Total
- 62,130
- vs nation
- R+30.5
Michigan 66th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 18,114
- Total
- 59,235
- vs nation
- R+35.0
- Lead
- 18,130
- Total
- 49,699
- vs nation
- R+38.6
- Lead
- 15,537
- Total
- 47,334
- vs nation
- R+36.7
- Lead
- 12,841
- Total
- 47,367
- vs nation
- R+34.4
- Lead
- 18,572
- Total
- 47,986
- vs nation
- R+36.2
- Lead
- 15,172
- Total
- 41,879
- vs nation
- R+36.7
- Lead
- 10,621
- Total
- 36,579
- vs nation
- R+37.6
Key facts
- 2024 presidential margin
- R+32.0MIT Election Lab
- Population
- 93,0142024 5-year
- Population density
- 457 / sq mi2024 5-year · TIGER/Line
- Land area
- 203 sq miTIGER/Line
- Median household income
- $109,7952024 5-year
- White (non-Hispanic)
- 88.2%2024 5-year
- Black
- 1.2%2024 5-year
- Hispanic / Latino
- 4.4%2024 5-year
- Peak Republican margin
- R+80.0 in 1924MIT Election Lab
- Most similar
- State House District 51, MI · twin score 93.1
presidential history
Party record book
Michigan 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
46.6%
8,917 votes · R+6.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 35.3%
Republican
Herbert Hoover1928
89.4%
3,762 votes · R+79.3 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 85.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
20,708votes
33.3% of the vote · R+32.0 · modeled estimate
Runner-up · Joe Biden, 2020 · 20,159 votes
Republican
Donald Trump2024
40,563votes
65.3% of the vote · R+32.0 · modeled estimate
Runner-up · Donald Trump, 2020 · 38,273 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
Hubert Humphrey1968
−25.3pts D vs U.S.
Place R+26.0 · U.S. R+0.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · −29.0 pts
Republican
Herbert Hoover1928
+61.9pts R vs U.S.
Place R+79.3 · U.S. R+17.5 · modeled estimate
Runner-up · Charles E. Hughes, 1916 · +60.2 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 |
|---|---|---|---|---|
| 2024 | D | 50.5%26,197 | 49.5%25,722 | 51,919 |
| 2020 | D | 53.7%27,845 | 46.3%24,030 | 51,875 |
With a 2024 presidential margin of R+31.9, this district sits well outside Michigan's competitive middle, reflecting rural or exurban demographics that have shifted heavily toward Republican candidates over the past decade.
Across the recorded series it reached a Republican high of 80.0 points in 1924. Between 2020 and 2024 the district moved 1.4 points toward the Republican candidate; the 2024 margin was 32.0 points.
A population of 93,014, a 88% non-Hispanic-white share, and a median household income of $109,795 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 51 and State House District 59.
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 →
Michigan 66th State House District. Akashic. https://akashic.app/sld-lower/26066/. Accessed May 20, 2026. License: CC BY 4.0.