Dewey County, South Dakota
Precinct data
Results by precinct
25 precincts · 1,871 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Precinct-04 Timber LakePrecinct-04 Timber Lake | 100 | 274 | 10 | 384 | 26.0% | 71.4% | R+45.3 |
|---|---|---|---|---|---|---|---|
| Precinct -Precinct-14 Eagle Butte SouthPrecinct-14 Eagle Butte South | 230 | 57 | 8 | 295 | 78.0% | 19.3% | D+58.6 |
| Precinct -Precinct-07 Eagle Butte EastPrecinct-07 Eagle Butte East | 220 | 52 | 6 | 278 | 79.1% | 18.7% | D+60.4 |
| Precinct -Precinct-12 Eagle Butte North (Precinct-13 Eagle Butte North)Precinct-12 Eagle Butte North (Precinct-13 Eagle Butte North) | 163 | 98 | 12 | 273 | 59.7% | 35.9% | D+23.8 |
| Precinct -Precinct-15 Eagle Butte WestPrecinct-15 Eagle Butte West | 119 | 79 | 2 | 200 | 59.5% | 39.5% | D+20.0 |
| Precinct -Precinct-06 IsabelPrecinct-06 Isabel | 17 | 104 | 4 | 125 | 13.6% | 83.2% | R+69.6 |
| Precinct -Precinct-11 Swiftbird/LaPlantPrecinct-11 Swiftbird/LaPlant | 74 | 14 | 1 | 89 | 83.1% | 15.7% | D+67.4 |
| Precinct -Precinct-09 PromisePrecinct-09 Promise | 48 | 20 | 0 | 68 | 70.6% | 29.4% | D+41.2 |
| Precinct -Precinct-05 FiresteelPrecinct-05 Firesteel | 19 | 44 | 0 | 63 | 30.2% | 69.8% | R+39.7 |
| Precinct -Precinct-08 White HorsePrecinct-08 White Horse | 39 | 12 | 3 | 54 | 72.2% | 22.2% | D+50.0 |
| Precinct -Precinct-02 Trail CityPrecinct-02 Trail City | 3 | 39 | 0 | 42 | 7.1% | 92.9% | R+85.7 |
| VTD-precinct 1010 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 1111 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 1212 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 1313 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 1414 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 1515 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 22 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 33 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 44 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 55 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 66 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 77 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 88 | 0 | 0 | 0 | 0 | — | — | Even |
| VTD-precinct 99 | 0 | 0 | 0 | 0 | — | — | Even |
Presidential margin, 1912–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1912 | +42.2% |
| 1916 | +3.6% |
| 1920 | −39.2% |
| 1924 | −40.7% |
| 1928 | −12.6% |
| 1932 | +38.3% |
| 1936 | +8.9% |
| 1940 | −12.7% |
| 1944 | −27.9% |
| 1948 | −8.2% |
| 1952 | −32.6% |
| 1956 | −13.5% |
| 1960 | −5.6% |
| 1964 | +12.4% |
| 1968 | −12.3% |
| 1972 | −18.0% |
| 1976 | −7.4% |
| 1980 | −25.2% |
| 1984 | −9.8% |
| 1988 | +13.5% |
| 1992 | +7.1% |
| 1996 | +23.1% |
| 2000 | +7.1% |
| 2004 | +26.7% |
| 2008 | +33.1% |
| 2012 | +28.7% |
| 2016 | +9.7% |
| 2020 | +17.3% |
| 2024 | +12.8% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 46.2%720 | 49.4%770 | 1,560 |
| 2020 | D | 54.6%1,062 | 45.4%884 | 1,946 |
Registered voters
By party of registration, over time
Registration leans Democratic; the presidential vote runs 14 points more Democratic.
3,444 registered voters · 2026
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−27 net domestic migration · 2025
Net −351 over 2011–2025 · gain loss
Arrivals reported $39,241 in average income, against $59,133 for residents who stayed — 34% lower. (IRS SOI, 2022–23)
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | +9 |
| 2012 | +32 |
| 2013 | −4 |
| 2014 | −15 |
| 2015 | −46 |
| 2016 | −15 |
| 2017 | −18 |
| 2018 | −30 |
| 2019 | −99 |
| 2021 | −23 |
| 2022 | −101 |
| 2023 | +58 |
| 2024 | −72 |
| 2025 | −27 |
Dewey County's electorate is shaped by the Cheyenne River Sioux Reservation, which covers much of its land area and drives Democratic margins that stand out sharply in an otherwise deeply Republican state.
Across the recorded series it reached a Democratic high of 42.2 points in 1912 and a Republican high of 40.7 points in 1924. Between 2020 and 2024 the county moved 4.6 points toward the Republican candidate; the 2024 margin was 12.8 points.
A population of 5,205, a 21% non-Hispanic-white share, and a median household income of $54,104 describe the county. The county's voting pattern over the last decade is most similar to that of Corson County and Todd County.
The counties 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.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
Dewey County, South Dakota. Akashic. https://akashic.app/county/46041/. Accessed May 20, 2026. License: CC BY 4.0.