South Dakota State House District 18
Safe Republican — shifted 10.0pp toward Republicans in 2024 — 24K residents
South Dakota State House District 18 is a state house district that has a population of 24,139. In the 2024 presidential election, it voted Republican with a margin of R+34.9. Akashic Edge tracks 5 presidential elections here, dating back to 2008.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 31.0% | 65.9% | R+34.9 | R+10.0 |
| 2020* | 36.2% | 61.1% | R+24.8 | R+0.7 |
| 2016* | 34.4% | 58.6% | R+24.2 | R+12.4 |
| 2012* | 42.8% | 54.7% | R+11.8 | R+10.3 |
| 2008* | 47.6% | 49.1% | R+1.5 | — |
* Pre-2022 results projected onto current district boundaries. Actual boundaries at the time of the election may have differed.
What defines SD-HD-18?
SD-HD-18 has been trending Republican — 23pp redder over the last 4 presidential cycles. It has a working-class, predominantly white electorate — strong Republican base territory.
Similar state house districts
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Key Insights
- Has voted Republican in the last 5 presidential elections
- Latest election (2024) was a Republican landslide with a 34.9% margin
- The 2008 election was decided by just 1.5 points — razor-thin
Who Lives Here
| Group | SD-HD-18 | State | National |
|---|---|---|---|
White (Non-Hispanic) | 86.9% | 79.8% | 57.4% |
Hispanic / Latino | 5.2% | 4.8% | 19.3% |
Multiracial / Other | 3.1% | 4.2% | 4.0% |
Native American / Alaska Native | 3.0% | 7.5% | 0.9% |
Black / African American | 1.3% | 2.3% | 12.2% |
Asian | 0.5% | 1.4% | 6.0% |
Who lives in South Dakota State House District 18? 24,139 residents as of the 2020 Census.
Demographics
Scale, voting-age share, and this geography's footprint inside the national electorate.
Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.
Age structure, language use, and nativity signals that explain how this geography differs from state and nation.
Turnout in SD-HD-18
How competitive is SD-HD-18?
Other South Dakota State House Districts
36 total| Name | Margin ↓ |
|---|---|
| SD-HD-26A | D+27.1 |
| SD-HD-15 | D+8.1 |
| SD-HD-10 | D+7.5 |
| SD-HD-27 | R+0.2 |
| SD-HD-32 | R+1.8 |
| SD-HD-14 | R+3.4 |
| SD-HD-12 | R+5.2 |
| SD-HD-11 | R+9.6 |
| SD-HD-28A | R+10.1 |
| SD-HD-07 | R+10.2 |
| SD-HD-13 | R+10.3 |
| SD-HD-34 | R+16.3 |
| SD-HD-17 | R+18.7 |
| SD-HD-01 | R+23.0 |
| SD-HD-03 | R+23.5 |
| SD-HD-09 | R+23.9 |
| SD-HD-02 | R+29.3 |
| SD-HD-31 | R+30.5 |
| SD-HD-06 | R+32.6 |
| SD-HD-35 | R+33.8 |
| SD-HD-33 | R+34.8 |
| SD-HD-08 | R+36.6 |
| SD-HD-26B | R+37.4 |
| SD-HD-05 | R+38.0 |
| SD-HD-25 | R+39.5 |