- Lead
- 1,435
- Total
- 5,892
- vs nation
- D+25.8
Kansas 66th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,572
- Total
- 6,198
- vs nation
- D+20.9
- Lead
- 1,116
- Total
- 6,087
- vs nation
- D+16.2
- Lead
- 692
- Total
- 5,640
- vs nation
- D+8.4
- Lead
- 1,112
- Total
- 6,281
- vs nation
- D+10.4
- Lead
- 57
- Total
- 5,408
- vs nation
- D+3.5
- Lead
- 69
- Total
- 4,741
- vs nation
- R+2.0
- Lead
- 9
- Total
- 5,157
- vs nation
- R+8.3
Key facts
- 2024 presidential margin
- D+24.4MIT Election Lab
- Population
- 24,1452024 5-year
- Population density
- 3,715 / sq mi2024 5-year · TIGER/Line
- Land area
- 6.5 sq miTIGER/Line
- Median household income
- $40,6172024 5-year
- White (non-Hispanic)
- 73.6%2024 5-year
- Black
- 5.4%2024 5-year
- Hispanic / Latino
- 9.0%2024 5-year
- Peak Democratic margin
- D+28.9 in 1912MIT Election Lab
- Peak Republican margin
- R+54.8 in 1876MIT Election Lab
- Most similar
- State House District 61, MT · twin score 90.5
presidential history
Party record book
Kansas 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
Kamala Harris2024
60.9%
3,589 votes · D+24.4 · modeled estimate
Runner-up · Joe Biden, 2020 · 60.7%
Republican
Rutherford B. Hayes1876
75.8%
250 votes · R+54.8 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 70.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
3,763votes
60.7% of the vote · D+25.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 3,604 votes
Republican
George W. Bush2004
2,623votes
48.5% of the vote · D+1.1 · modeled estimate
Runner-up · John McCain, 2008 · 2,492 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
+25.8pts D vs U.S.
Place D+24.4 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +20.9 pts
Republican
Benjamin Harrison1892
+45.3pts R vs U.S.
Place R+43.6 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · +30.7 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
District 66 sits within the Kansas City suburban corridor of Johnson County, where dense residential neighborhoods and a highly educated workforce have produced some of the most lopsided Democratic margins in the state legislature.
Across the recorded series it reached a Democratic high of 28.9 points in 1912 and a Republican high of 54.8 points in 1876. Between 2020 and 2024 the district moved 1.0 points toward the Republican candidate; the 2024 margin was 24.4 points.
A population of 24,145, a 74% non-Hispanic-white share, and a median household income of $40,617 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 61 and State House District 75.
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 →
Kansas 66th State House District. Akashic. https://akashic.app/sld-lower/20066/. Accessed May 20, 2026. License: CC BY 4.0.