See main article: 1940 United States presidential election.
| Election Name: | 1940 United States presidential election in South Dakota |
| Country: | South Dakota |
| Flag Year: | 1909 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1936 United States presidential election in South Dakota |
| Previous Year: | 1936 |
| Next Election: | 1944 United States presidential election in South Dakota |
| Next Year: | 1944 |
| Votes For Election: | All 4 South Dakota votes to the Electoral College |
| Election Date: | November 5, 1940[1] |
| Image1: | WendellWillkie.jpg |
| Nominee1: | Wendell Willkie |
| Party1: | Republican Party (United States) |
| Home State1: | New York |
| Running Mate1: | Charles L. McNary |
| Electoral Vote1: | 4 |
| Popular Vote1: | 177,065 |
| Percentage1: | 57.41% |
| Nominee2: | Franklin D. Roosevelt |
| Party2: | Democratic Party (United States) |
| Home State2: | New York |
| Running Mate2: | Henry A. Wallace |
| Electoral Vote2: | 0 |
| Popular Vote2: | 131,362 |
| Percentage2: | 42.59% |
| President | |
| Before Election: | Franklin D. Roosevelt |
| Before Party: | Democratic Party (United States) |
| After Election: | Franklin D. Roosevelt |
| After Party: | Democratic Party (United States) |
| Map Size: | 300px |
The 1940 United States presidential election in South Dakota took place on November 5, 1940, as part of the 1940 United States presidential election. Voters chose four[2] representatives, or electors, to the Electoral College, who voted for president and vice president.
South Dakota was won by Wendell Willkie (R–New York), running with Minority Leader Charles L. McNary, with 57.41% of the popular vote, against incumbent President Franklin D. Roosevelt (D–New York), running with Secretary Henry A. Wallace, with 42.59% of the popular vote.[3] [4]
South Dakota would prove to be Willkie's largest win of any state, as he carried the state by 14.82 percentage points, despite Roosevelt carrying it by 12 percentage points four years prior.[5] Additionally, with 57.41% of the popular vote, South Dakota was Willkie's strongest state in the 1940 election in terms of popular vote percentage.[6]
| County[7] | Wendell Lewis Willkie Republican | Franklin Delano Roosevelt Democratic | Margin | Total votes cast | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data-sort-type="number" | data-sort-type="number" | % | data-sort-type="number" | data-sort-type="number" | % | data-sort-type="number" | data-sort-type="number" | % | |||||||
| Aurora | 1,408 | 50.41% | 1,385 | 49.59% | 23 | 0.82% | 2,793 | ||||||||
| Beadle | 4,356 | 45.33% | 5,253 | 54.67% | -897 | -9.33% | 9,609 | ||||||||
| Bennett | 915 | 51.55% | 860 | 48.45% | 55 | 3.10% | 1,775 | ||||||||
| Bon Homme | 3,046 | 55.29% | 2,463 | 44.71% | 583 | 10.58% | 5,509 | ||||||||
| Brookings | 5,016 | 65.25% | 2,671 | 34.75% | 2,345 | 30.51% | 7,687 | ||||||||
| Brown | 6,598 | 45.05% | 8,048 | 54.95% | -1,450 | -9.90% | 14,646 | ||||||||
| Brule | 1,352 | 42.42% | 1,835 | 57.58% | -483 | -15.16% | 3,187 | ||||||||
| Buffalo | 491 | 55.42% | 395 | 44.58% | 96 | 10.84% | 886 | ||||||||
| Butte | 2,164 | 60.99% | 1,384 | 39.01% | 780 | 21.98% | 3,548 | ||||||||
| Campbell | 1,733 | 80.64% | 416 | 19.36% | 1,317 | 61.28% | 2,149 | ||||||||
| Charles Mix | 2,993 | 47.54% | 3,303 | 52.46% | -310 | -4.92% | 6,296 | ||||||||
| Clark | 2,622 | 61.75% | 1,624 | 38.25% | 998 | 23.50% | 4,246 | ||||||||
| Clay | 2,463 | 52.08% | 2,266 | 47.92% | 197 | 4.17% | 4,729 | ||||||||
| Codington | 4,320 | 53.83% | 3,705 | 46.17% | 615 | 7.66% | 8,025 | ||||||||
| Corson | 1,709 | 56.27% | 1,328 | 43.73% | 381 | 12.55% | 3,037 | ||||||||
| Custer | 1,796 | 60.94% | 1,151 | 39.06% | 645 | 21.89% | 2,947 | ||||||||
| Davison | 3,659 | 46.38% | 4,230 | 53.62% | -571 | -7.24% | 7,889 | ||||||||
| Day | 3,277 | 49.85% | 3,297 | 50.15% | -20 | -0.30% | 6,574 | ||||||||
| Deuel | 2,304 | 66.40% | 1,166 | 33.60% | 1,138 | 32.80% | 3,470 | ||||||||
| Dewey | 1,396 | 56.36% | 1,081 | 43.64% | 315 | 12.72% | 2,477 | ||||||||
| Douglas | 1,977 | 65.53% | 1,040 | 34.47% | 937 | 31.06% | 3,017 | ||||||||
| Edmunds | 2,341 | 61.87% | 1,443 | 38.13% | 898 | 23.73% | 3,784 | ||||||||
| Fall River | 2,420 | 63.27% | 1,405 | 36.73% | 1,015 | 26.54% | 3,825 | ||||||||
| Faulk | 1,431 | 54.41% | 1,199 | 45.59% | 232 | 8.82% | 2,630 | ||||||||
| Grant | 2,981 | 59.38% | 2,039 | 40.62% | 942 | 18.76% | 5,020 | ||||||||
| Gregory | 2,478 | 54.91% | 2,035 | 45.09% | 443 | 9.82% | 4,513 | ||||||||
| Haakon | 1,129 | 61.49% | 707 | 38.51% | 422 | 22.98% | 1,836 | ||||||||
| Hamlin | 2,279 | 64.00% | 1,282 | 36.00% | 997 | 28.00% | 3,561 | ||||||||
| Hand | 2,002 | 55.46% | 1,608 | 44.54% | 394 | 10.91% | 3,610 | ||||||||
| Hanson | 1,408 | 53.66% | 1,216 | 46.34% | 192 | 7.32% | 2,624 | ||||||||
| Harding | 755 | 52.98% | 670 | 47.02% | 85 | 5.96% | 1,425 | ||||||||
| Hughes | 1,982 | 59.27% | 1,362 | 40.73% | 620 | 18.54% | 3,344 | ||||||||
| Hutchinson | 5,051 | 82.08% | 1,103 | 17.92% | 3,948 | 64.15% | 6,154 | ||||||||
| Hyde | 1,018 | 60.31% | 670 | 39.69% | 348 | 20.62% | 1,688 | ||||||||
| Jackson | 620 | 58.77% | 435 | 41.23% | 185 | 17.54% | 1,055 | ||||||||
| Jerauld | 1,576 | 63.17% | 919 | 36.83% | 657 | 26.33% | 2,495 | ||||||||
| Jones | 832 | 62.09% | 508 | 37.91% | 324 | 24.18% | 1,340 | ||||||||
| Kingsbury | 3,551 | 70.26% | 1,503 | 29.74% | 2,048 | 40.52% | 5,054 | ||||||||
| Lake | 4,179 | 68.87% | 1,889 | 31.13% | 2,290 | 37.74% | 6,068 | ||||||||
| Lawrence | 5,288 | 60.07% | 3,515 | 39.93% | 1,773 | 20.14% | 8,803 | ||||||||
| Lincoln | 4,081 | 66.59% | 2,048 | 33.41% | 2,033 | 33.17% | 6,129 | ||||||||
| Lyman | 1,409 | 56.05% | 1,105 | 43.95% | 304 | 12.09% | 2,514 | ||||||||
| Marshall | 1,989 | 50.21% | 1,972 | 49.79% | 17 | 0.43% | 3,961 | ||||||||
| McCook | 3,310 | 66.12% | 1,696 | 33.88% | 1,614 | 32.24% | 5,006 | ||||||||
| McPherson | 2,839 | 77.46% | 826 | 22.54% | 2,013 | 54.92% | 3,665 | ||||||||
| Meade | 2,560 | 57.00% | 1,931 | 43.00% | 629 | 14.01% | 4,491 | ||||||||
| Mellette | 990 | 52.24% | 905 | 47.76% | 85 | 4.49% | 1,895 | ||||||||
| Miner | 2,095 | 60.55% | 1,365 | 39.45% | 730 | 21.10% | 3,460 | ||||||||
| Minnehaha | 16,664 | 57.62% | 12,259 | 42.38% | 4,405 | 15.23% | 28,923 | ||||||||
| Moody | 2,749 | 60.17% | 1,820 | 39.83% | 929 | 20.33% | 4,569 | ||||||||
| Pennington | 6,603 | 57.51% | 4,878 | 42.49% | 1,725 | 15.02% | 11,481 | ||||||||
| Perkins | 1,777 | 57.36% | 1,321 | 42.64% | 456 | 14.72% | 3,098 | ||||||||
| Potter | 1,278 | 54.80% | 1,054 | 45.20% | 224 | 9.61% | 2,332 | ||||||||
| Roberts | 3,504 | 48.30% | 3,750 | 51.70% | -246 | -3.39% | 7,254 | ||||||||
| Sanborn | 1,732 | 55.34% | 1,398 | 44.66% | 334 | 10.67% | 3,130 | ||||||||
| Shannon | 1,094 | 58.04% | 791 | 41.96% | 303 | 16.07% | 1,885 | ||||||||
| Spink | 2,975 | 48.70% | 3,134 | 51.30% | -159 | -2.60% | 6,109 | ||||||||
| Stanley | 679 | 55.66% | 541 | 44.34% | 138 | 11.31% | 1,220 | ||||||||
| Sully | 840 | 64.71% | 458 | 35.29% | 382 | 29.43% | 1,298 | ||||||||
| Todd | 1,245 | 50.14% | 1,238 | 49.86% | 7 | 0.28% | 2,483 | ||||||||
| Tripp | 2,492 | 54.40% | 2,089 | 45.60% | 403 | 8.80% | 4,581 | ||||||||
| Turner | 4,644 | 72.36% | 1,774 | 27.64% | 2,870 | 44.72% | 6,418 | ||||||||
| Union | 3,116 | 54.44% | 2,608 | 45.56% | 508 | 8.87% | 5,724 | ||||||||
| Walworth | 1,921 | 55.11% | 1,565 | 44.89% | 356 | 10.21% | 3,486 | ||||||||
| Washabaugh | 358 | 48.91% | 374 | 51.09% | -16 | -2.19% | 732 | ||||||||
| Washington | 335 | 52.59% | 302 | 47.41% | 33 | 5.18% | 637 | ||||||||
| Yankton | 4,179 | 57.70% | 3,064 | 42.30% | 1,115 | 15.39% | 7,243 | ||||||||
| Ziebach | 691 | 50.15% | 687 | 49.85% | 4 | 0.29% | 1,378 | ||||||||
| Armstrong | 0 | N/A | 0 | N/A | N/A | N/A | 0 | ||||||||
| Totals | 177,065 | 57.41% | 131,362 | 42.59% | 45,703 | 14.82% | 308,427 | ||||||||