- Lead
- 4,738
- Total
- 14,481
- vs nation
- D+34.2
Kansas 21st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,813
- Total
- 15,394
- vs nation
- D+26.8
- Lead
- 2,967
- Total
- 13,598
- vs nation
- D+19.7
- Lead
- 1,115
- Total
- 12,300
- vs nation
- D+5.2
- Lead
- 2,254
- Total
- 12,946
- vs nation
- D+10.1
- Lead
- 381
- Total
- 11,335
- vs nation
- D+5.8
- Lead
- 243
- Total
- 9,518
- vs nation
- D+2.0
- Lead
- 251
- Total
- 8,360
- vs nation
- R+5.5
Key facts
- 2024 presidential margin
- D+32.7MIT Election Lab
- Population
- 23,8712024 5-year
- Population density
- 4,116 / sq mi2024 5-year · TIGER/Line
- Land area
- 5.8 sq miTIGER/Line
- Median household income
- $95,1702024 5-year
- White (non-Hispanic)
- 84.7%2024 5-year
- Black
- 2.0%2024 5-year
- Hispanic / Latino
- 6.6%2024 5-year
- Peak Democratic margin
- D+59.0 in 1912MIT Election Lab
- Peak Republican margin
- R+31.8 in 1892MIT Election Lab
- Most similar
- State House District 25, KS · twin score 98.9
presidential history
Party record book
Kansas 21st 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
William J. Bryan1908
75.7%
153 votes · D+52.5 · modeled estimate
Runner-up · William J. Bryan, 1900 · 74.4%
Republican
Richard Nixon1972
62.4%
2,598 votes · R+27.9 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 60.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
9,854votes
64.0% of the vote · D+31.3 · modeled estimate
Runner-up · Kamala Harris, 2024 · 9,507 votes
Republican
Mitt Romney2012
5,417votes
44.0% of the vote · D+9.1 · modeled estimate
Runner-up · George W. Bush, 2004 · 5,414 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
William J. Bryan1908
+62.0pts D vs U.S.
Place D+52.5 · U.S. R+9.6 · modeled estimate
Runner-up · William J. Bryan, 1900 · +56.3 pts
Republican
Benjamin Harrison1892
+33.5pts R vs U.S.
Place R+31.8 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Thomas E. Dewey, 1944 · +17.2 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 | 57.2%7,202 | 42.8%5,385 | 12,587 |
Kansas 21st State House District sits in the Great Plains. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 59.0 points in 1912 and a Republican high of 31.8 points in 1892. Between 2020 and 2024 the district moved 1.5 points toward the Democratic candidate; the 2024 margin was 32.7 points.
A population of 23,871, a 85% non-Hispanic-white share, and a median household income of $95,170 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 25 and State House District 19.
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 21st State House District. Akashic. https://akashic.app/sld-lower/20021/. Accessed May 20, 2026. License: CC BY 4.0.