- Lead
- 4,603
- Total
- 11,466
- vs nation
- R+38.7
South Dakota 20th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,098
- Total
- 10,717
- vs nation
- R+42.7
- Lead
- 3,809
- Total
- 10,125
- vs nation
- R+39.7
- Lead
- 2,125
- Total
- 10,179
- vs nation
- R+24.7
- Lead
- 1,363
- Total
- 10,854
- vs nation
- R+19.8
- Lead
- 2,823
- Total
- 11,723
- vs nation
- R+21.6
- Lead
- 1,992
- Total
- 10,016
- vs nation
- R+20.4
- Lead
- 136
- Total
- 10,432
- vs nation
- R+7.2
Key facts
- 2024 presidential margin
- R+40.1MIT Election Lab
- Population
- 24,0782024 5-year
- Population density
- 15 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,638 sq miTIGER/Line
- Median household income
- $68,0572024 5-year
- White (non-Hispanic)
- 89.2%2024 5-year
- Black
- 0.7%2024 5-year
- Hispanic / Latino
- 4.3%2024 5-year
- Peak Democratic margin
- D+41.7 in 1912MIT Election Lab
- Peak Republican margin
- R+50.4 in 1904MIT Election Lab
- Most similar
- State House District 4, SD · twin score 95.1
presidential history
Party record book
South Dakota 20th State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 20 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
William J. Bryan1896
51.7%
1,610 votes · D+4.5 · modeled estimate
Runner-up · Michael Dukakis, 1988 · 47.8%
Republican
Theodore Roosevelt1904
70.4%
3,304 votes · R+50.4 · modeled estimate
Runner-up · Donald Trump, 2024 · 68.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Michael Dukakis1988
5,281votes
47.8% of the vote · R+3.7 · modeled estimate
Runner-up · Bill Clinton, 1996 · 4,716 votes
Republican
Donald Trump2024
7,899votes
68.9% of the vote · R+40.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 7,291 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
Woodrow Wilson1912
+22.2pts D vs U.S.
Place D+41.7 · U.S. D+19.5 · a third-party candidate carried the Place · modeled estimate
Runner-up · William J. Bryan, 1896 · +10.6 pts
Republican
Donald Trump2020
+42.7pts R vs U.S.
Place R+38.2 · U.S. D+4.5 · modeled estimate
Runner-up · Benjamin Harrison, 1892 · +42.1 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 |
|---|---|---|---|---|
| 2020 | R | 0.0%0 | 100.0%8,943 | 8,943 |
The district recorded a Republican presidential margin of R+40.2 in 2024 and R+12.6 in 2008, switching sides at least once in between. About 24,500 residents lived here, with White alone at 90.3% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 41.7 points in 1912 and a Republican high of 50.4 points in 1904. Between 2020 and 2024 the district moved 1.9 points toward the Republican candidate; the 2024 margin was 40.1 points.
A population of 24,078, a 89% non-Hispanic-white share, and a median household income of $68,057 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 4 and State House District 5.
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 →
South Dakota 20th State House District. Akashic. https://akashic.app/sld-lower/46020/. Accessed May 20, 2026. License: CC BY 4.0.