South Dakota 15th State Senate District, South Dakota: Tossup district. In 2024, voted R+13%. Republican peak: R+15 in 2016.
Key facts
- 2024 presidential margin
- R+13MIT Election Lab
- Political archetype
- TossupAkashic typology
- Population
- 26,1332024 5-year
- Median household income
- $76,8802024 5-year
- White (non-Hispanic)
- 79.7%2024 5-year
- Black
- 6.5%2024 5-year
- Hispanic / Latino
- 6.6%2024 5-year
- Peak Democratic margin
- D+1 in 2008MIT Election Lab
- Peak Republican margin
- R+15 in 2016MIT Election Lab
Constituent county margins for State Senate District 15, SDOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 5,132 | 6,664 | 12,082 | ||
| R | 5,204 | 6,331 | 11,869 | ||
| R | 3,936 | 5,406 | 10,063 | ||
| R | 4,457 | 5,186 | 9,845 | ||
| D | 5,121 | 5,046 | 10,355 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
31.5%
Irish
10.2%
English
7.1%
American
4.5%
French
1.6%
Italian
1.3%
Polish
1.3%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 36.0 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$76,880
State Senate District 15 ranks near the middle of US counties.
State Senate District 15$76,880
South Dakota$75,081
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.8%
Child poverty is below the national average.
Children under 1810.3%
Working age (18–64)8.2%
Seniors (65+)9.9%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
89.7%
speak English only
Spanish4.4%
Other languages3.0%
Other Indo-European2.1%
Asian & Pacific Islander0.8%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 33.1% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin exceeding 42 points, this district offers little electoral competition at the statewide level, making primary contests the more consequential battleground for representation.
The district's recent history is a story of close margins. The Democratic margin reached one points in 2008; the Republican margin reached fifteen points in 2016. Most other elections have been decided by single-digit points.
Its demographics — a population of 26,133, a 80% non-Hispanic-white share, a median household income of $76,880 — situate the district close to national averages on several dimensions.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State Senate District 15, South Dakota — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/sld-upper/46015/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 15, South Dakota vote in 2024?
In 2024, State Senate District 15, South Dakota voted Republican by 12.7 points (R+13), carried by the Republican candidate. Out of 12,082 votes cast, 5,132 went Democratic and 6,664 went Republican.
What is State Senate District 15, South Dakota's political archetype?
Akashic classifies State Senate District 15, South Dakota as a "Tossup" district based on its long-arc presidential voting pattern. Across 5 elections in the dataset, the district has voted Democratic 1 times, Republican 4 times, and other 0 times.
When did State Senate District 15, South Dakota last vote Democratic?
The most recent presidential election in which State Senate District 15, South Dakota voted Democratic was 2008.
How many people live in State Senate District 15, South Dakota?
State Senate District 15, South Dakota has a population of 26,133 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 15, South Dakota?
Median household income in State Senate District 15, South Dakota is $76,880 — below the national median of $80,734. The South Dakota state median is $75,081.
What is the political history of State Senate District 15, South Dakota?
Akashic tracks 5 presidential elections in State Senate District 15, South Dakota from 2008 to 2024. Of those, 1 went Democratic and 4 went Republican. The district's archetype — "Tossup" — captures the overall trajectory of that voting record.