Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

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What's the difference?

South Dakota › Governor · November 3, 2026 · Updated Oct 16, 2026

South Dakota Governor

Rhoden is clearly favored to win: Rhoden wins in 9 of every 10 simulations.

Ahlers (D)
10%
chance of winning
Rhoden (R)
90%
Average margin
R+14.4
80% of outcomes
R+29 to Even
Partisan lean
R+29
Polls
No pollsmodel only

Rhoden is clearly favored to win: Rhoden wins in about 9 of every 10 simulations.

Ahlers (D)
8%
chance of winning
Rhoden (R)
92%
Average margin
R+18.0
80% of outcomes
R+34 to R+2
Partisan lean
R+29
Polls
No pollsmodel only

Range of outcomes

R+14.4R+40R+20EvenD+20D+40
R+18.0R+60R+40R+20EvenD+20D+40D+60

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Ahlers 10%Rhoden 90%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

0%25%50%75%100%AugSepOctNovNov 3Ahlers 8%Rhoden 92%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

The candidates

Democratic

Dan Ahlers

Executive director of the South Dakota Democratic Party, former state senator (2008–2010), and nominee for U.S. Senate in 2020

Experience
State legislature

Profile and career · Wikipedia

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast
South Dakota state offices
+0.0Polls for governor, statewide and legislative races · details
Environment here
D+9.5Used by the fundamentals
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by the national and state moodR+19.5Fundamentals modelAdds incumbency, past results, money andexperienceR+15.1Polls in similar placesPolling of similar races in South Dakota andlook-alike placesR+13.0Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+14.3Pulse forecastPolls (and polling of similar places) only, todayR+17.9

Each estimate is a margin before national and statewide uncertainty is simulated. Horizon blends polls, fundamentals and a little of the similar-places estimate, weighting each by how precise it is; Pulse uses polls and similar places only.

Fundamentals inputs
Incumbency (+1 D, −1 R)0
Fundraising edge (log ratio of individual money)0
Elected-experience edge-0.33
First-term incumbent0
Seat's last result vs. expectation7.22
Incumbent's last result vs. expectation0

Polls

No public polls of this race. The forecast relies on fundamentals and on polling of similar places.

The state

Lean R+29: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+31.9R+34.2 vs. nation2020 presidentR+26.9R+31.4 vs. nation2024 presidentR+29.9R+28.4 vs. nation

Who lives here

Population
907,428
Adults with a B.A.+
32%
White, no degree
56%of adults
  • White 80%
  • Hispanic 5%
  • Black 2%
  • Asian 1%
  • Other / multiracial 12%

American Community Survey 2020–2024, aggregated from census tracts.

Past results

2024 President Vote in this state

418,940 two-party votes · R+29.9 · R+28.4 vs. the nation
✓ Donald Trump (R)64.9%
Kamala Harris (D)35.1%

2022

350,166 votes · R+27.6
✓ Kristi Noem (R)62.0%
Jamie Smith (D)35.2%
Tracey Quint (L)2.9%

2020 President Vote in this state

411,514 two-party votes · R+26.9 · R+31.4 vs. the nation
✓ Donald Trump (R)63.4%
Joe Biden (D)36.6%

2018

338,715 votes · R+3.5
✓ Kristi Noem And Larry Rhoden (R)51.0%
Billie Sutton And Michelle Lavallee (D)47.6%
Kurt Evans And Richard Shelatz (L)1.4%

2016 President Vote in this state

345,179 two-party votes · R+31.9 · R+34.2 vs. the nation
✓ Donald Trump (R)66.0%
Hillary Clinton (D)34.0%

2014

266,026 votes · R+47.0
✓ Dennis Daugaard (R)73.5%
Susan Wismer (D)26.5%

2010

317,083 votes · R+23.0
✓ Dennis Daugaard (R)61.5%
Scott Heidepriem (D)38.5%

2006

328,216 votes · R+26.1
✓ Mike Rounds (R)63.1%
Jack Billion (D)36.9%

2002

330,183 votes · R+15.0
✓ Mike Rounds (R)57.5%
Jim Abbott (D)42.5%

Also on the ballot in South Dakota