state house districtSouth Dakota 21st State House District
presidential margin
2004–2024 · Democratic minus Republican
2004R+28.9
2008R+23.6
2012R+34.8
2016R+53.9
2020R+53.5
2024R+56.5
full record · 1892 → 2024
presidential returns
2024 turnout 65.7% of 17,630 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
2,417
8,965
204
11,586
17,630
65.7%
2020
2,660
9,003
185
11,847
17,897†
66.2%
2016
2,342
8,362
461
11,165
18,200†
61.3%
2012
3,706
7,779
209
11,695
18,236†
64.1%
2008
4,570
7,477
266
12,313
18,202†
67.6%
2004
4,952
9,075
221
14,248
18,168†
78.4%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
18922024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupSD HD 21South DakotaUnited States
German33.3%33.1%12.5%
Dutch8.2%3.4%—
Irish7.4%9.9%9.4%
Czech6.8%——
American6.6%4.4%5.3%
English5.5%7.7%9.5%
Norwegian4.3%10.4%—
Swedish1.5%2.5%—
Rosebud Sioux2.8%1.1%—
Oglala Sioux0.5%2.0%—
Mexican1.7%2.6%11.3%
Cuban0.2%—0.7%
Puerto Rican0.2%0.4%1.8%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
SD HD 21
South Dakota
United States
Median age
40.7
38.2
39.1
Age 18–24
7.1%
9.2%
9.2%
Age 65 and older
22.2%
18.0%
17.2%
Household economy
Measure
SD HD 21
South Dakota
United States
Median household income
$65,719
$75,081
$84,427
Poverty rate
17.4%
12.0%
12.5%
Bachelor's degree or higher (25+)
22.7%
31.9%
35.6%
Languages at home
Measure
SD HD 21
South Dakota
United States
Speaks a non-English language at home
5.1%
7.1%
22.3%
Spanish
1.3%
2.6%
13.6%
Other languages
2.0%
1.9%
0.8%
Religious landscape
Measure
SD HD 21
South Dakota
United States
Catholic
—
14.8%
18.6%
Evangelical Protestant
—
20.1%
16.5%
Unclaimed / not counted
—
44.9%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
South Dakota 21st State House District
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−36.9%
1896
−4.8%
1900
−4.2%
1904
−31.2%
1908
−10.2%
1912
+46.0%
1916
+4.0%
1920
−28.5%
1924
−16.9%
1928
−8.7%
1932
+49.1%
1936
+23.3%
1940
−7.1%
1944
−6.7%
1948
+6.5%
1952
−26.0%
1956
−0.3%
1960
−11.7%
1964
+17.9%
1968
−13.2%
1972
−5.2%
1976
+5.9%
1980
−36.1%
1984
−31.9%
1988
−11.9%
1992
−7.9%
1996
−10.8%
2000
−34.7%
2004
−28.9%
2008
−23.6%
2012
−34.8%
2016
−53.9%
2020
−53.5%
2024
−56.5%
DemocraticRepublican
38 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. † 2004, 2012 sub-county results are estimated: the source's block-level detail for these cycles was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
20.9%Harris2,417
77.4%Trump8,965
1.8%
R+56.5
R+3.0
R+55.0
11,586
R
22.5%Biden2,660
76.0%Trump9,003
1.6%
R+53.5
D+0.4
R+58.0
11,847
R
21.0%Clinton2,342
74.9%Trump8,362
4.1%
R+53.9
R+19.1
R+56.0
11,165
R
31.7%Obama3,706
66.5%Romney7,779
1.8%
R+34.8
R+11.2
R+38.7
11,695
R
37.1%Obama4,570
60.7%McCain7,477
2.2%
R+23.6
D+5.3
R+30.9
12,313
R
34.8%Kerry4,952
63.7%Bush9,075
1.6%
R+28.9
D+5.7
R+26.5
14,248
R
31.5%Gore3,693
66.2%Bush7,758
2.3%
R+34.7
R+23.9
R+35.2
11,722
R
39.3%Clinton5,111
50.1%Dole6,517
10.7%
R+10.8
R+2.9
R+19.3
13,014
R
34.1%Clinton4,724
42.0%Bush5,824
23.9%
R+7.9
D+4.0
R+13.5
13,854
R
43.8%Dukakis6,243
55.7%Bush7,938
0.5%
R+11.9
D+20.0
R+4.2
14,253
R
33.8%Mondale4,969
65.7%Reagan9,661
0.5%
R+31.9
D+4.2
R+13.7
14,707
R
29.4%Carter4,787
65.4%Reagan10,665
5.2%
R+36.1
R+42.0
R+26.3
16,299
D
52.8%Carter8,316
46.8%Ford7,379
0.4%
D+5.9
D+11.1
D+3.9
15,758
R
47.3%McGovern7,927
52.5%Nixon8,790
0.2%
R+5.2
D+8.0
D+18.0
16,752
R
40.6%Humphrey6,648
53.8%Nixon8,800
5.6%
R+13.2
R+31.0
R+12.5
16,364
D
58.9%Johnson10,427
41.1%Goldwater7,265
0.0%
D+17.9
D+29.6
R+4.7
17,692
R
44.1%Kennedy8,090
55.9%Nixon10,243
0.0%
R+11.7
R+11.5
R+11.9
18,333
R
49.9%Stevenson8,933
50.1%Eisenhower8,978
0.0%
R+0.3
D+25.7
D+15.2
17,911
R
37.0%Stevenson7,131
63.0%Eisenhower12,129
0.0%
R+26.0
R+32.4
R+15.2
19,260
D
52.7%Truman8,807
46.2%Dewey7,724
1.0%
D+6.5
D+13.2
D+2.0
16,702
R
46.6%Roosevelt7,683
53.4%Dewey8,794
0.0%
R+6.7
D+0.3
R+14.2
16,477
R
46.5%Roosevelt9,851
53.5%Willkie11,347
0.0%
R+7.1
R+30.4
R+17.0
21,197
D
60.8%Roosevelt13,418
37.5%Landon8,269
1.7%
D+23.3
R+25.7
R+0.9
22,071
D
74.1%Roosevelt16,631
25.0%Hoover5,617
0.9%
D+49.1
D+57.8
D+31.3
22,446
R
45.4%Smith9,443
54.2%Hoover11,257
0.4%
R+8.7
D+8.2
D+8.7
20,782
R
22.6%Davis4,037
39.6%Coolidge7,061
37.8%
R+16.9
D+11.6
D+8.2
17,845
R
26.9%Cox3,847
55.5%Harding7,923
17.6%
R+28.5
R+32.6
R+2.4
14,279
D
50.9%Wilson5,983
46.8%Hughes5,507
2.3%
D+4.0
R+42.0
D+0.9
11,757
O
46.0%Wilson5,297
0.0%Taft0
54.0%
Roosevelt +7.9
D+56.2
D+26.5
11,508
R
43.5%Bryan3,998
53.7%Taft4,934
2.8%
R+10.2
D+21.0
R+0.6
9,192
R
32.3%Parker2,011
63.5%Roosevelt3,951
4.2%
R+31.2
R+26.9
R+11.5
6,224
R
47.2%Bryan2,370
51.4%McKinley2,583
1.4%
R+4.2
D+0.5
D+3.3
5,022
R
47.2%Bryan1,569
52.0%McKinley1,728
0.8%
R+4.8
D+32.1
D+1.3
3,325
R
14.6%Cleveland431
51.5%Harrison1,518
33.8%
R+36.9
—
R+38.6
2,945
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current representation
Current officeholders
RJim HalversonState House · 21
RMarty OverwegState House · 21
State legislative officeholder from OpenStates nightly current-legislator data.
With a 2024 presidential margin of R+70.1, this district ranks among the most heavily one-sided in the state. Its 24,573 residents are spread across a largely rural footprint where competitive general elections are rare.
Across the recorded series it reached a Democratic high of 49.1 points in 1932 and a Republican high of 56.5 points in 2024. Between 2020 and 2024 the district moved 3.0 points toward the Republican candidate; the 2024 margin was 56.5 points.
A population of 24,573, a 76% non-Hispanic-white share, and a median household income of $65,719 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 23 and State House District 19.
Akashic
Political twins — state-house districts
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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
South Dakota 21st State House District. Akashic. https://akashic.app/sld-lower/46021/. Accessed May 20, 2026. License: CC BY 4.0.
How did South Dakota 21st State House District vote in 2024?
In 2024, South Dakota 21st State House District voted Republican by 56.5 points (R+56.5), carried by the Republican candidate. Out of 11,586 votes cast, 2,417 went Democratic and 8,965 went Republican.
When did South Dakota 21st State House District last vote Democratic?
The most recent presidential election in which South Dakota 21st State House District voted Democratic was 1976.
How many people live in South Dakota 21st State House District?
South Dakota 21st State House District has a population of 24,573 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in South Dakota 21st State House District?
Median household income in South Dakota 21st State House District is $65,719 — below the national median of $80,734. The South Dakota state median is $75,081.
What is the political history of South Dakota 21st State House District?
Akashic tracks 38 presidential elections in South Dakota 21st State House District from 1876 to 2024. Of those, 6 went Democratic and 27 went Republican.
