# 1948 United States presidential election in South Dakota

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The 1948 United States presidential election in South Dakota took place on November 2, 1948, as part of the 1948 United States presidential election. Voters chose four representatives, or electors, to the Electoral College, who voted for president and vice president.
South Dakota was won by Governor Thomas E. Dewey (R–New York), running with Governor Earl Warren, with 51.84% of the popular vote, against incumbent President Harry S. Truman (D–Missouri), running with Senator Alben W. Barkley, with 47.04% of the popular vote.

## Results

1948 United States presidential election in South Dakota :
| Party | Party | Candidate | Votes | % |
| | Republican | Thomas E. Dewey | 129,651 | 51.84% |
| | Democratic | Harry S. Truman (inc.) | 117,653 | 47.04% |
| | Independent | Henry A. Wallace | 2,801 | 1.12% |
| Total votes | Total votes | Total votes | 250,105 | 100% |

### Results by county

| County | Thomas E. Dewey Republican | Thomas E. Dewey Republican | Harry S. Truman Democratic | Harry S. Truman Democratic | Henry Wallace Independent | Henry Wallace Independent | Margin | Margin | Total votes cast |
| County | # | % | # | % | # | % | # | % | Total votes cast |
| Armstrong | 1 | 14.29% | 6 | 85.71% | 0 | 0.00% | -5 | -71.43% | 7 |
| Aurora | 1,056 | 45.30% | 1,275 | 54.70% | 16 | 0.69% | -219 | -9.40% | 2,331 |
| Beadle | 3,662 | 45.58% | 4,372 | 54.42% | 77 | 0.96% | -710 | -8.84% | 8,034 |
| Bennett | 477 | 38.62% | 758 | 61.38% | 17 | 1.38% | -281 | -22.75% | 1,235 |
| Bon Homme | 2,283 | 52.36% | 2,077 | 47.64% | 48 | 1.10% | 206 | 4.72% | 4,360 |
| Brookings | 3,975 | 57.76% | 2,907 | 42.24% | 44 | 0.64% | 1,068 | 15.52% | 6,882 |
| Brown | 5,632 | 44.07% | 7,148 | 55.93% | 192 | 1.50% | -1,516 | -11.86% | 12,780 |
| Brule | 1,056 | 38.48% | 1,646 | 59.99% | 42 | 1.53% | -590 | -21.51% | 2,744 |
| Buffalo | 313 | 48.38% | 334 | 51.62% | 5 | 0.77% | -21 | -3.25% | 647 |
| Butte | 1,726 | 61.84% | 1,065 | 38.16% | 51 | 1.83% | 661 | 23.68% | 2,791 |
| Campbell | 1,518 | 78.05% | 410 | 21.08% | 17 | 0.87% | 1,108 | 56.97% | 1,945 |
| Charles Mix | 1,800 | 36.47% | 3,086 | 62.53% | 49 | 0.99% | -1,286 | -26.06% | 4,935 |
| Clark | 1,625 | 50.59% | 1,559 | 48.54% | 28 | 0.87% | 66 | 2.05% | 3,212 |
| Clay | 2,228 | 51.09% | 2,080 | 47.70% | 53 | 1.22% | 148 | 3.39% | 4,361 |
| Codington | 3,349 | 45.01% | 4,042 | 54.32% | 50 | 0.67% | -693 | -9.31% | 7,441 |
| Corson | 1,154 | 49.63% | 1,154 | 49.63% | 17 | 0.73% | 0 | 0.00% | 2,325 |
| Custer | 1,217 | 56.66% | 917 | 42.69% | 14 | 0.65% | 300 | 13.97% | 2,148 |
| Davison | 2,996 | 42.03% | 4,064 | 57.01% | 68 | 0.95% | -1,068 | -14.98% | 7,128 |
| Day | 2,438 | 42.91% | 3,146 | 55.38% | 97 | 1.71% | -708 | -12.46% | 5,681 |
| Deuel | 1,357 | 49.91% | 1,324 | 48.69% | 38 | 1.40% | 33 | 1.21% | 2,719 |
| Dewey | 864 | 53.80% | 727 | 45.27% | 15 | 0.93% | 137 | 8.53% | 1,606 |
| Douglas | 1,301 | 63.71% | 736 | 36.04% | 5 | 0.24% | 565 | 27.67% | 2,042 |
| Edmunds | 1,493 | 54.00% | 1,253 | 45.32% | 19 | 0.69% | 240 | 8.68% | 2,765 |
| Fall River | 2,037 | 59.72% | 1,348 | 39.52% | 26 | 0.76% | 689 | 20.20% | 3,411 |
| Faulk | 1,054 | 51.49% | 971 | 47.44% | 22 | 1.07% | 83 | 4.05% | 2,047 |
| Grant | 1,972 | 48.57% | 2,052 | 50.54% | 36 | 0.89% | -80 | -1.97% | 4,060 |
| Gregory | 1,723 | 48.37% | 1,793 | 50.34% | 46 | 1.29% | -70 | -1.97% | 3,562 |
| Haakon | 753 | 57.92% | 519 | 39.92% | 28 | 2.15% | 234 | 18.00% | 1,300 |
| Hamlin | 1,608 | 53.98% | 1,326 | 44.51% | 45 | 1.51% | 282 | 9.47% | 2,979 |
| Hand | 1,402 | 50.47% | 1,367 | 49.21% | 9 | 0.32% | 35 | 1.26% | 2,778 |
| Hanson | 860 | 47.05% | 953 | 52.13% | 15 | 0.82% | -93 | -5.09% | 1,828 |
| Harding | 529 | 50.87% | 479 | 46.06% | 32 | 3.08% | 50 | 4.81% | 1,040 |
| Hughes | 1,739 | 61.43% | 1,080 | 38.15% | 12 | 0.42% | 659 | 23.28% | 2,831 |
| Hutchinson | 2,906 | 70.01% | 1,209 | 29.13% | 36 | 0.87% | 1,697 | 40.88% | 4,151 |
| Hyde | 817 | 59.25% | 553 | 40.10% | 9 | 0.65% | 264 | 19.14% | 1,379 |
| Jackson | 432 | 56.40% | 321 | 41.91% | 13 | 1.70% | 111 | 14.49% | 766 |
| Jerauld | 1,085 | 54.60% | 876 | 44.09% | 26 | 1.31% | 209 | 10.52% | 1,987 |
| Jones | 522 | 55.06% | 414 | 43.67% | 12 | 1.27% | 108 | 11.39% | 948 |
| Kingsbury | 2,332 | 62.55% | 1,338 | 35.89% | 58 | 1.56% | 994 | 26.66% | 3,728 |
| Lake | 2,837 | 56.95% | 2,093 | 42.01% | 52 | 1.04% | 744 | 14.93% | 4,982 |
| Lawrence | 3,778 | 62.50% | 2,209 | 36.54% | 58 | 0.96% | 1,569 | 25.96% | 6,045 |
| Lincoln | 2,771 | 59.51% | 1,826 | 39.22% | 59 | 1.27% | 945 | 20.30% | 4,656 |
| Lyman | 993 | 51.94% | 904 | 47.28% | 15 | 0.78% | 89 | 4.65% | 1,912 |
| Marshall | 1,419 | 44.37% | 1,710 | 53.47% | 69 | 2.16% | -291 | -9.10% | 3,198 |
| McCook | 2,064 | 59.46% | 1,387 | 39.96% | 20 | 0.58% | 677 | 19.50% | 3,471 |
| McPherson | 2,034 | 76.24% | 611 | 22.90% | 23 | 0.86% | 1,423 | 53.34% | 2,668 |
| Meade | 2,053 | 54.47% | 1,681 | 44.60% | 35 | 0.93% | 372 | 9.87% | 3,769 |
| Mellette | 482 | 49.33% | 482 | 49.33% | 13 | 1.33% | 0 | 0.00% | 977 |
| Miner | 1,188 | 45.92% | 1,373 | 53.07% | 26 | 1.01% | -185 | -7.15% | 2,587 |
| Minnehaha | 14,047 | 53.77% | 11,770 | 45.05% | 308 | 1.18% | 2,277 | 8.72% | 26,125 |
| Moody | 1,691 | 50.19% | 1,630 | 48.38% | 48 | 1.42% | 61 | 1.81% | 3,369 |
| Pennington | 6,392 | 56.01% | 4,929 | 43.19% | 92 | 0.81% | 1,463 | 12.82% | 11,413 |
| Perkins | 1,424 | 55.04% | 1,096 | 42.37% | 67 | 2.59% | 328 | 12.68% | 2,587 |
| Potter | 1,044 | 49.69% | 1,039 | 49.45% | 18 | 0.86% | 5 | 0.24% | 2,101 |
| Roberts | 2,211 | 39.12% | 3,277 | 57.98% | 164 | 2.90% | -1,066 | -18.86% | 5,652 |
| Sanborn | 990 | 48.03% | 1,046 | 50.75% | 25 | 1.21% | -56 | -2.72% | 2,061 |
| Shannon | 641 | 44.09% | 803 | 55.23% | 10 | 0.69% | -162 | -11.14% | 1,454 |
| Spink | 2,310 | 45.59% | 2,702 | 53.33% | 55 | 1.09% | -392 | -7.74% | 5,067 |
| Stanley | 522 | 58.85% | 359 | 40.47% | 6 | 0.68% | 163 | 18.38% | 887 |
| Sully | 579 | 58.37% | 405 | 40.83% | 8 | 0.81% | 174 | 17.54% | 992 |
| Todd | 625 | 43.46% | 796 | 55.35% | 17 | 1.18% | -171 | -11.89% | 1,438 |
| Tripp | 1,845 | 48.32% | 1,918 | 50.24% | 55 | 1.44% | -73 | -1.91% | 3,818 |
| Turner | 3,048 | 66.26% | 1,514 | 32.91% | 38 | 0.83% | 1,534 | 33.35% | 4,600 |
| Union | 2,205 | 49.38% | 2,237 | 50.10% | 23 | 0.52% | -32 | -0.72% | 4,465 |
| Walworth | 1,607 | 50.94% | 1,513 | 47.96% | 35 | 1.11% | 94 | 2.98% | 3,155 |
| Washabaugh | 192 | 45.82% | 223 | 53.22% | 4 | 0.95% | -31 | -7.40% | 419 |
| Yankton | 2,904 | 49.28% | 2,932 | 49.75% | 57 | 0.97% | -28 | -0.48% | 5,893 |
| Ziebach | 463 | 47.24% | 503 | 51.33% | 14 | 1.43% | -40 | -4.08% | 980 |
| Totals | 129,651 | 51.84% | 117,653 | | 2,801 | 1.12% | 11,998 | 4.80% | 250,105 |

#### Counties that flipped from Republican to Democratic

* Aurora
* Codington
* Corson (became tied)
* Gregory
* Grant
* Day
* Hanson
* Marshall
* Mellette (became tied)
* Miner
* Shannon
* Sanborn
* Spink
* Todd
* Union
* Tripp
* Yankton