HarrisDemocratic35.6%6,075TrumpRepublican62.5%10,645KennedyIndependent1.5%251
R+26.8- Lead
- 4,570
- Total
- 17,043
- vs nation
- R+25.3
- Turnout
- 62.1%
Akashiccounty
Brown County, SD
Contests in this Place (85 available)
President34 · 1892–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
President results by year
2024 turnout 62.1% of 27,962 citizens 18+
BidenDemocratic37.3%6,538TrumpRepublican60.3%10,580JorgensenLibertarian2.4%429
R+23.0- Lead
- 4,042
- Total
- 17,547
- vs nation
- R+27.5
- Turnout
- 62.0%
ClintonDemocratic33.8%5,452TrumpRepublican59.7%9,613JohnsonLibertarian5.7%915
R+25.8- Lead
- 4,161
- Total
- 16,114
- vs nation
- R+27.9
- Turnout
- 57.9%
ObamaDemocratic45.1%7,250RomneyRepublican51.8%8,321OtherAll other candidates3.1%497
R+6.7- Lead
- 1,071
- Total
- 16,068
- vs nation
- R+10.5
- Turnout
- —
ObamaDemocratic51.9%9,041McCainRepublican46.3%8,067OtherAll other candidates1.8%318
D+5.6- Lead
- 974
- Total
- 17,426
- vs nation
- R+1.7
- Turnout
- —
KerryDemocratic42.7%7,943BushRepublican55.8%10,386OtherAll other candidates1.5%270
R+13.1- Lead
- 2,443
- Total
- 18,599
- vs nation
- R+10.7
- Turnout
- —
GoreDemocratic43.3%7,173BushRepublican54.7%9,060OtherAll other candidates2.0%323
R+11.4- Lead
- 1,887
- Total
- 16,556
- vs nation
- R+11.9
- Turnout
- —
ClintonDemocratic48.1%7,913DoleRepublican41.4%6,801PerotReform9.9%1,622
D+6.8- Lead
- 1,112
- Total
- 16,447
- vs nation
- R+1.8
- Turnout
- —
Key facts
- 2024 presidential margin
- R+26.8MIT Election Lab
- Population
- 37,8772024 5-year
- Population density
- 22 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,713 sq miTIGER/Line
- Median household income
- $70,8982024 5-year
- White (non-Hispanic)
- 84.7%2024 5-year
- Black
- 1.3%2024 5-year
- Hispanic / Latino
- 4.7%2024 5-year
- Peak Democratic margin
- D+50.7 in 1912MIT Election Lab
- Peak Republican margin
- R+52.7 in 1924MIT Election Lab
- Most similar
- Lyon County, MN · twin score 86.0
Turnout and midterm durability
Participation measured against the same-year citizen voting-age population. Audited cycles count total general-election participants — ballots or participating voters, not presidential candidate votes. Cycles before 2016 predate that series and are derived from the certified presidential returns instead; they are marked everywhere they appear and are excluded from the figures below.
2004–20248 cycles · 5 audited
- 2024 turnout
- 62.1%17,358 participants ÷ 27,962 CVAP
- 2020→2022 drop-off
- +10.5 ptsVolatile
- Drop-off vs state
- -1.8 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026
- 51.6%–53.2%Recent-cycle and two-cycle persistence scenarios; not a forecast
Participation by cycle
Presidential Midterm Derived, pre-2016
Select a presidential cycle to show it on the map and results ledger above.
| Cycle | Participants | CVAP | Turnout | Series | Quality |
|---|---|---|---|---|---|
| 17,358 | 27,962 ± 318 | 62.1% | Audited | A/A | |
| 2022Mid | 14,372 | 27,928 ± 309 | 51.5% | Audited | C/A |
| 17,768 | 28,671 ± 336 | 62.0% | Audited | A/A | |
| 2018Mid | 14,543 | 28,728 ± 261 | 50.6% | Audited | A/A |
| 16,511 | 28,512 ± 257 | 57.9% | Audited | A/A | |
| 16,068 | 27,766 | 57.9% | Derived | — | |
| 17,426 | 27,049 | 64.4% | Derived | — | |
| 18,599 | 26,332 extrapolated | 70.6% | Derived | — |
Sources and methods
Audited cycles (2016, 2018, 2020, 2022, 2024) count total general-election participants against the same-year CVAP special tabulation, each cell carrying its own numerator and denominator quality grade. Derived cycles (2004, 2008, 2012) come from the certified presidential returns on this page over the ACS 5-year CVAP series, so they measure presidential votes cast rather than ballots — a floor on participation. Where a derived cycle predates the ACS its denominator is extrapolated rather than read, and says so on its own line below. They are shown for the longer arc and are excluded from the drop-off, excess-drop-off, and 2026 scenario figures above.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
- 2022: numerator source 159, denominator source 157; top ticket votes; canonical-complete-contest-floor-v1; allocation share 0.0%; series 154/183.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2016: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 293/111.
- 2012 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2008 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2004 (derived): Certified presidential returns · extrapolated CVAP denominator; presidential votes cast — a floor on participation, not a ballot count; 2004 predates the ACS, so the denominator is a linear back-extrapolation from the 2008 and 2012 CVAP values, not a read figure.
Interactive election map
One map. Every available contest.
The map and local result cover Brown County only. The complete contest result is shown below for comparison.
Brown County result
0 precinct units · 0 candidate votes
Dusty Johnson0—
Jon Hansen0—
Larry Rhoden0—
Toby Doeden0—
Governor contest result
Loading the complete contest result…
Explore precinct resultsSearch, sort, compare years, or export CSV · 22 precincts
Precinct data
Results by precinct
22 precincts · 0 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| VTD-precinct 1 Aberdeen1 | 0 | 0 | 0 | 0 | — | — | No votes |
|---|---|---|---|---|---|---|---|
| VTD-precinct 10 Aberdeen10 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 11 Aberdeen11 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 12 EAberdeen12 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 13 Shlby--Clmbia-Cmbria-OrdwyTwp-ClmbiaCity13 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 14 Oneota-Brnrd-Wstprt-GrlndTwp-WestprtCty14 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 15 Franklin-Carlisle-Ravinia-Mercier-LincolnTwp15 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 16 WAberdeenTwp16 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 17 Highland-NewHope-WarnerTwp-Warner17 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 18 Gem-WRondell-ERondellTwp-Stratford18 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 1919 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 2 Aberdeen2 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 20 SDetroit-ClaremontTwp-ClaremontCity20 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 21 Lbrt-Hcla-Prt-Grnld-Lnsg-Nth-DtrtTwp-HclCy21 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 22 Plmr-Ocla-Savo-Alsn-Frdrck-RchdTwp-FrdrCy22 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 3 Aberdeen3 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 4 Aberdeen4 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 5 Aberdeen5 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 6 Aberdeen6 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 7 Aberdeen7 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 8 Aberdeen8 | 0 | 0 | 0 | 0 | — | — | No votes |
| VTD-precinct 9 Aberdeen9 | 0 | 0 | 0 | 0 | — | — | No votes |
presidential history
Party record book
Brown County, SD · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
65.6%
9,177 votes · D+33.4
Runner-up · Franklin D. Roosevelt, 1932 · 63.7%
Republican
Theodore Roosevelt1904
66.3%
2,737 votes · R+42.4
Runner-up · Donald Trump, 2024 · 62.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
9,177votes
65.6% of the vote · D+33.4
Runner-up · Lyndon B. Johnson, 1964 · 9,107 votes
Republican
Donald Trump2024
10,645votes
62.5% of the vote · R+26.8
Runner-up · Donald Trump, 2020 · 10,580 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
+31.1pts D vs U.S.
Place D+50.7 · U.S. D+19.5
Runner-up · George McGovern, 1972 · +23.7 pts
Republican
Benjamin Harrison1892
+38.2pts R vs U.S.
Place R+36.6 · U.S. D+1.7 · a third-party candidate carried the Place
Runner-up · Donald Trump, 2016 · +27.9 pts
current representation
Current officeholders
RMichael RohlState Senate · 1
RLogan ManhartState House · 1
RNick FosnessState House · 1
Seats representing Brown County, SD. A county elects none of these itself — they are the members for the 1 congressional, 1 state senate and 1 state house districts it falls inside, so parts of the county are represented by different members.
U.S. House elections · 2 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | R | 0.0%0 | 100.0%13,706 | 13,706 |
| 2018 | R | 39.6%5,482 | 60.4%8,346 | 13,828 |
voter registration
Registered voters
By party of registration, over time
Party registration · 2026R+31.3
Presidential vote · 2024R+26.8
Registration leans Republican; the presidential vote runs 4.5 points more Democratic than the rolls.
23,797 registered voters · 2026
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−116 net domestic migration · 2025
20112025
Net −860 over 2011–2025 · gain loss
Arrivals reported $55,032 in average income, against $98,253 for residents who stayed — 44% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+38.0 on average — 11 points more Republican-leaning than Brown County, SD itself (R+26.8).
Where arrivals came from lean of each source
- Spink County, SD43R+39.0
- Edmunds County, SD42R+60.8
- Minnehaha County, SD37R+12.7
- Codington County, SD25R+40.8
- Day County, SD22R+29.9
- Beadle County, SD21R+40.1
Where departures went households, 2022–23
- Minnehaha County, SD89
- Lincoln County, SD39
- Codington County, SD36
- Spink County, SD32
- Hennepin County, MN22
- Cass County, ND20
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 | +58 |
| 2012 | +389 |
| 2013 | +406 |
| 2014 | −38 |
| 2015 | −3 |
| 2016 | +151 |
| 2017 | +21 |
| 2018 | −373 |
| 2019 | −473 |
| 2021 | −168 |
| 2022 | −275 |
| 2023 | −282 |
| 2024 | −157 |
| 2025 | −116 |
Brown County anchors the agricultural northeast corner of South Dakota, with Aberdeen serving as a regional trade and healthcare center. Once competitive at the presidential level, it has shifted toward double-digit Republican margins since 2012.
Across the recorded series it reached a Democratic high of 50.7 points in 1912 and a Republican high of 52.7 points in 1924. Between 2020 and 2024 the county moved 3.8 points toward the Republican candidate; the 2024 margin was 26.8 points.
A population of 37,877, a 85% non-Hispanic-white share, and a median household income of $70,898 describe the county. The county's voting pattern over the last decade is most similar to that of Lyon County and Richland County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Lyon County
Minnesota
86.0twin score
elasticity% Catholicmedian age≠ French ancestry
Richland County
North Dakota
83.0twin score
elasticity% Catholic% unaffiliated≠ Norwegian ancestry
Yankton County
South Dakota
82.8twin score
elasticity% Catholic2008 margin≠ Swedish ancestry
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Brown County, South Dakota. Akashic. https://akashic.app/county/46013/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Brown County
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Frequently asked questions
How did Brown County, South Dakota vote in 2024?
In 2024, Brown County, South Dakota voted Republican by 26.8 points (R+26.8), carried by the Republican candidate. Out of 17,043 votes cast, 6,075 went Democratic and 10,645 went Republican.
When did Brown County, South Dakota last vote Democratic?
The most recent presidential election in which Brown County, South Dakota voted Democratic was 2008.
How many people live in Brown County, South Dakota?
Brown County, South Dakota has a population of 37,877 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Brown County, South Dakota?
Median household income in Brown County, South Dakota is $70,898 — below the national median of $80,734. The South Dakota state median is $75,081.
What is the political history of Brown County, South Dakota?
Akashic tracks 38 presidential elections in Brown County, South Dakota from 1876 to 2024. Of those, 16 went Democratic and 17 went Republican.