South Dakota — 1940 presidential election
Recent presidential results
Akashicstate1940 presidential electionSouth Dakota · PresidentWillkieR+14.8
How it voted
Share of the 1940 vote
| Wendell Willkie ✓Republican | 57.4% | 177,065 |
|---|---|---|
| Franklin D. RooseveltDemocratic | 42.6% | 131,362 |
| OtherAll other candidates | 0.0% | 0 |
1940presidential margin
D+60R+60
66 counties, each filled by 1940 D-vs-R margin. Hover any county for its result.
South Dakota cast 4 electoral votes this cycle.
County-level results (66 counties) — table
| County | Winner | Margin |
|---|---|---|
| Aurora County, SD | Republican | R+0.8 |
| Beadle County, SD | Democratic | D+9.3 |
| Bennett County, SD | Republican | R+3.1 |
| Bon Homme County, SD | Republican | R+10.6 |
| Brookings County, SD | Republican | R+30.5 |
| Brown County, SD | Democratic | D+9.9 |
| Brule County, SD | Democratic | D+15.2 |
| Buffalo County, SD | Republican | R+10.8 |
| Butte County, SD | Republican | R+22.0 |
| Campbell County, SD | Republican | R+61.3 |
| Charles Mix County, SD | Democratic | D+4.9 |
| Clark County, SD | Republican | R+23.5 |
| Clay County, SD | Republican | R+4.2 |
| Codington County, SD | Republican | R+7.7 |
| Corson County, SD | Republican | R+12.5 |
| Custer County, SD | Republican | R+21.9 |
| Davison County, SD | Democratic | D+7.2 |
| Day County, SD | Democratic | D+0.3 |
| Deuel County, SD | Republican | R+32.8 |
| Dewey County, SD | Republican | R+12.7 |
| Douglas County, SD | Republican | R+31.1 |
| Edmunds County, SD | Republican | R+23.7 |
| Fall River County, SD | Republican | R+26.5 |
| Faulk County, SD | Republican | R+8.8 |
| Grant County, SD | Republican | R+18.8 |
| Gregory County, SD | Republican | R+9.8 |
| Haakon County, SD | Republican | R+23.0 |
| Hamlin County, SD | Republican | R+28.0 |
| Hand County, SD | Republican | R+10.9 |
| Hanson County, SD | Republican | R+7.3 |
| Harding County, SD | Republican | R+6.0 |
| Hughes County, SD | Republican | R+18.5 |
| Hutchinson County, SD | Republican | R+64.2 |
| Hyde County, SD | Republican | R+20.6 |
| Jackson County, SD | Republican | R+9.5 |
| Jerauld County, SD | Republican | R+26.3 |
| Jones County, SD | Republican | R+24.2 |
| Kingsbury County, SD | Republican | R+40.5 |
| Lake County, SD | Republican | R+37.7 |
| Lawrence County, SD | Republican | R+20.1 |
| Lincoln County, SD | Republican | R+33.2 |
| Lyman County, SD | Republican | R+12.1 |
| Marshall County, SD | Republican | R+0.4 |
| McCook County, SD | Republican | R+32.2 |
| McPherson County, SD | Republican | R+54.9 |
| Meade County, SD | Republican | R+14.0 |
| Mellette County, SD | Republican | R+4.5 |
| Miner County, SD | Republican | R+21.1 |
| Minnehaha County, SD | Republican | R+15.2 |
| Moody County, SD | Republican | R+20.3 |
| Oglala Lakota County, SD | Republican | R+13.3 |
| Pennington County, SD | Republican | R+15.0 |
| Perkins County, SD | Republican | R+14.7 |
| Potter County, SD | Republican | R+9.6 |
| Roberts County, SD | Democratic | D+3.4 |
| Sanborn County, SD | Republican | R+10.7 |
| Spink County, SD | Democratic | D+2.6 |
| Stanley County, SD | Republican | R+11.3 |
| Sully County, SD | Republican | R+29.4 |
| Todd County, SD | Republican | R+0.3 |
| Tripp County, SD | Republican | R+8.8 |
| Turner County, SD | Republican | R+44.7 |
| Union County, SD | Republican | R+8.9 |
| Walworth County, SD | Republican | R+10.2 |
| Yankton County, SD | Republican | R+15.4 |
| Ziebach County, SD | Republican | R+0.3 |
South Dakota results by county
66 counties. Third-party and independent votes are reported by the county source as one combined figure; every named candidate is listed in the complete result below.
| Led by | |||||
|---|---|---|---|---|---|
| Aurora County | Wendell Willkie+23 | 1,40850.4% | 1,38549.6% | 00.0% | 2,793 |
| Beadle County | Franklin D. Roosevelt+897 | 4,35645.3% | 5,25354.7% | 00.0% | 9,609 |
| Bennett County | Wendell Willkie+55 | 91551.5% | 86048.5% | 00.0% | 1,775 |
| Bon Homme County | Wendell Willkie+583 | 3,04655.3% | 2,46344.7% | 00.0% | 5,509 |
| Brookings County | Wendell Willkie+2,345 | 5,01665.3% | 2,67134.7% | 00.0% | 7,687 |
| Brown County | Franklin D. Roosevelt+1,450 | 6,59845.0% | 8,04855.0% | 00.0% | 14,646 |
| Brule County | Franklin D. Roosevelt+483 | 1,35242.4% | 1,83557.6% | 00.0% | 3,187 |
| Buffalo County | Wendell Willkie+96 | 49155.4% | 39544.6% | 00.0% | 886 |
| Butte County | Wendell Willkie+780 | 2,16461.0% | 1,38439.0% | 00.0% | 3,548 |
| Campbell County | Wendell Willkie+1,317 | 1,73380.6% | 41619.4% | 00.0% | 2,149 |
| Charles Mix County | Franklin D. Roosevelt+310 | 2,99347.5% | 3,30352.5% | 00.0% | 6,296 |
| Clark County | Wendell Willkie+998 | 2,62261.8% | 1,62438.2% | 00.0% | 4,246 |
| Clay County | Wendell Willkie+197 | 2,46352.1% | 2,26647.9% | 00.0% | 4,729 |
| Codington County | Wendell Willkie+615 | 4,32053.8% | 3,70546.2% | 00.0% | 8,025 |
| Corson County | Wendell Willkie+381 | 1,70956.3% | 1,32843.7% | 00.0% | 3,037 |
| Custer County | Wendell Willkie+645 | 1,79660.9% | 1,15139.1% | 00.0% | 2,947 |
| Davison County | Franklin D. Roosevelt+571 | 3,65946.4% | 4,23053.6% | 00.0% | 7,889 |
| Day County | Franklin D. Roosevelt+20 | 3,27749.8% | 3,29750.2% | 00.0% | 6,574 |
| Deuel County | Wendell Willkie+1,138 | 2,30466.4% | 1,16633.6% | 00.0% | 3,470 |
| Dewey County | Wendell Willkie+315 | 1,39656.4% | 1,08143.6% | 00.0% | 2,477 |
| Douglas County | Wendell Willkie+937 | 1,97765.5% | 1,04034.5% | 00.0% | 3,017 |
| Edmunds County | Wendell Willkie+898 | 2,34161.9% | 1,44338.1% | 00.0% | 3,784 |
| Fall River County | Wendell Willkie+1,015 | 2,42063.3% | 1,40536.7% | 00.0% | 3,825 |
| Faulk County | Wendell Willkie+232 | 1,43154.4% | 1,19945.6% | 00.0% | 2,630 |
| Grant County | Wendell Willkie+942 | 2,98159.4% | 2,03940.6% | 00.0% | 5,020 |
| Gregory County | Wendell Willkie+443 | 2,47854.9% | 2,03545.1% | 00.0% | 4,513 |
| Haakon County | Wendell Willkie+422 | 1,12961.5% | 70738.5% | 00.0% | 1,836 |
| Hamlin County | Wendell Willkie+997 | 2,27964.0% | 1,28236.0% | 00.0% | 3,561 |
| Hand County | Wendell Willkie+394 | 2,00255.5% | 1,60844.5% | 00.0% | 3,610 |
| Hanson County | Wendell Willkie+192 | 1,40853.7% | 1,21646.3% | 00.0% | 2,624 |
| Harding County | Wendell Willkie+85 | 75553.0% | 67047.0% | 00.0% | 1,425 |
| Hughes County | Wendell Willkie+620 | 1,98259.3% | 1,36240.7% | 00.0% | 3,344 |
| Hutchinson County | Wendell Willkie+3,948 | 5,05182.1% | 1,10317.9% | 00.0% | 6,154 |
| Hyde County | Wendell Willkie+348 | 1,01860.3% | 67039.7% | 00.0% | 1,688 |
| Jackson County | Wendell Willkie+169 | 97854.7% | 80945.3% | 00.0% | 1,787 |
| Jerauld County | Wendell Willkie+657 | 1,57663.2% | 91936.8% | 00.0% | 2,495 |
| Jones County | Wendell Willkie+324 | 83262.1% | 50837.9% | 00.0% | 1,340 |
| Kingsbury County | Wendell Willkie+2,048 | 3,55170.3% | 1,50329.7% | 00.0% | 5,054 |
| Lake County | Wendell Willkie+2,290 | 4,17968.9% | 1,88931.1% | 00.0% | 6,068 |
| Lawrence County | Wendell Willkie+1,773 | 5,28860.1% | 3,51539.9% | 00.0% | 8,803 |
| Lincoln County | Wendell Willkie+2,033 | 4,08166.6% | 2,04833.4% | 00.0% | 6,129 |
| Lyman County | Wendell Willkie+304 | 1,40956.0% | 1,10544.0% | 00.0% | 2,514 |
| Marshall County | Wendell Willkie+17 | 1,98950.2% | 1,97249.8% | 00.0% | 3,961 |
| McCook County | Wendell Willkie+1,614 | 3,31066.1% | 1,69633.9% | 00.0% | 5,006 |
| McPherson County | Wendell Willkie+2,013 | 2,83977.5% | 82622.5% | 00.0% | 3,665 |
| Meade County | Wendell Willkie+629 | 2,56057.0% | 1,93143.0% | 00.0% | 4,491 |
| Mellette County | Wendell Willkie+85 | 99052.2% | 90547.8% | 00.0% | 1,895 |
| Miner County | Wendell Willkie+730 | 2,09560.5% | 1,36539.5% | 00.0% | 3,460 |
| Minnehaha County | Wendell Willkie+4,405 | 16,66457.6% | 12,25942.4% | 00.0% | 28,923 |
| Moody County | Wendell Willkie+929 | 2,74960.2% | 1,82039.8% | 00.0% | 4,569 |
| Oglala Lakota County | Wendell Willkie+336 | 1,42956.7% | 1,09343.3% | 00.0% | 2,522 |
| Pennington County | Wendell Willkie+1,725 | 6,60357.5% | 4,87842.5% | 00.0% | 11,481 |
| Perkins County | Wendell Willkie+456 | 1,77757.4% | 1,32142.6% | 00.0% | 3,098 |
| Potter County | Wendell Willkie+224 | 1,27854.8% | 1,05445.2% | 00.0% | 2,332 |
| Roberts County | Franklin D. Roosevelt+246 | 3,50448.3% | 3,75051.7% | 00.0% | 7,254 |
| Sanborn County | Wendell Willkie+334 | 1,73255.3% | 1,39844.7% | 00.0% | 3,130 |
| Spink County | Franklin D. Roosevelt+159 | 2,97548.7% | 3,13451.3% | 00.0% | 6,109 |
| Stanley County | Wendell Willkie+138 | 67955.7% | 54144.3% | 00.0% | 1,220 |
| Sully County | Wendell Willkie+382 | 84064.7% | 45835.3% | 00.0% | 1,298 |
| Todd County | Wendell Willkie+7 | 1,24550.1% | 1,23849.9% | 00.0% | 2,483 |
| Tripp County | Wendell Willkie+403 | 2,49254.4% | 2,08945.6% | 00.0% | 4,581 |
| Turner County | Wendell Willkie+2,870 | 4,64472.4% | 1,77427.6% | 00.0% | 6,418 |
| Union County | Wendell Willkie+508 | 3,11654.4% | 2,60845.6% | 00.0% | 5,724 |
| Walworth County | Wendell Willkie+356 | 1,92155.1% | 1,56544.9% | 00.0% | 3,486 |
| Yankton County | Wendell Willkie+1,115 | 4,17957.7% | 3,06442.3% | 00.0% | 7,243 |
| Ziebach County | Wendell Willkie+4 | 69150.1% | 68749.9% | 00.0% | 1,378 |
Nominees: Franklin D. Roosevelt (D) · Wendell Willkie (R)
South Dakota's presidential margins
1892–2024, the 1940 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | −36.5% |
| 1896 | +0.2% |
| 1900 | −15.6% |
| 1904 | −49.4% |
| 1908 | −23.8% |
| 1912 | +42.1% |
| 1916 | −3.9% |
| 1920 | −41.0% |
| 1924 | −36.3% |
| 1928 | −21.0% |
| 1932 | +29.2% |
| 1936 | +11.5% |
| 1940 | −14.8% |
| 1944 | −16.7% |
| 1948 | −4.8% |
| 1952 | −38.5% |
| 1956 | −16.8% |
| 1960 | −16.4% |
| 1964 | +11.2% |
| 1968 | −11.3% |
| 1972 | −8.6% |
| 1976 | −1.5% |
| 1980 | −28.8% |
| 1984 | −26.5% |
| 1988 | −6.3% |
| 1992 | −3.5% |
| 1996 | −3.5% |
| 2000 | −22.7% |
| 2004 | −21.3% |
| 2008 | −8.4% |
| 2012 | −18.0% |
| 2016 | −29.8% |
| 2020 | −26.2% |
| 2024 | −29.2% |
Source. Compiled historical county records — 1940 presidential returns · official county-level results. Real returns — nothing estimated.