- Lead
- 1,385
- Total
- 34,294
- vs nation
- D+5.5
Wisconsin 21st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,549
- Total
- 33,147
- vs nation
- D+0.2
- Lead
- 68
- Total
- 29,501
- vs nation
- R+1.9
- Lead
- 1,005
- Total
- 33,209
- vs nation
- R+6.9
- Lead
- 1,009
- Total
- 32,089
- vs nation
- R+10.4
- Lead
- 5,489
- Total
- 34,295
- vs nation
- R+13.5
- Lead
- 5,770
- Total
- 31,191
- vs nation
- R+19.0
- Lead
- 2,632
- Total
- 25,935
- vs nation
- R+18.7
Key facts
- 2024 presidential margin
- D+4.0MIT Election Lab
- Population
- 59,3432024 5-year
- Population density
- 1,582 / sq mi2024 5-year · TIGER/Line
- Land area
- 37.5 sq miTIGER/Line
- Median household income
- $87,0662024 5-year
- White (non-Hispanic)
- 72.4%2024 5-year
- Black
- 3.6%2024 5-year
- Hispanic / Latino
- 13.6%2024 5-year
- Peak Democratic margin
- D+25.5 in 1936MIT Election Lab
- Peak Republican margin
- R+55.2 in 1920MIT Election Lab
- Most similar
- Assembly District 14, WI · twin score 97.3
presidential history
Party record book
Wisconsin 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
Franklin D. Roosevelt1936
58.7%
10,610 votes · D+25.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 51.5%
Republican
James A. Garfield1880
75.2%
1,579 votes · R+50.6 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 74.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
17,363votes
50.6% of the vote · D+4.0 · modeled estimate
Runner-up · Joe Biden, 2020 · 17,064 votes
Republican
Dwight D. Eisenhower1956
24,800votes
74.0% of the vote · R+48.7 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 23,976 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
+5.5pts D vs U.S.
Place D+4.0 · U.S. R+1.5 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · +1.2 pts
Republican
William McKinley1896
+43.7pts R vs U.S.
Place R+49.7 · U.S. R+6.1 · modeled estimate
Runner-up · William McKinley, 1900 · +39.6 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 | 69.4%19,447 | 30.6%8,588 | 28,035 |
Wisconsin Assembly District 21 sits close enough to the competitive middle that a 4.6-point Republican presidential lean offers no guarantee of comfort down-ballot, making it a consistent target for both parties in state legislative contests.
Across the recorded series it reached a Democratic high of 25.5 points in 1936 and a Republican high of 55.2 points in 1920. Between 2020 and 2024 the district moved 0.6 points toward the Republican candidate; the 2024 margin was 4.0 points.
A population of 59,343, a 72% non-Hispanic-white share, and a median household income of $87,066 describe the district. The district's voting pattern over the last decade is most similar to that of Assembly District 14 and Assembly District 61.
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 21st State House District. Akashic. https://akashic.app/sld-lower/55021/. Accessed May 20, 2026. License: CC BY 4.0.