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United States · Election results history · 2018 House · South Dakota
Election 2018 Results

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2018 US House elections in South Dakota

South Dakota elected one member of the House in 2018. Dustin "Dusty" Johnson (Republican) beat Tim Bjorkman (Democrat) in South Dakota in 2018, 60.3% to 36.0%, a margin of 24.3 points and 81,630 votes.

In the House vote by county, Republicans led in 59 of the 66 counties and Democrats in 7. The largest, Minnehaha, cast 69,480 votes and went to the Republican by 12.4 points. The closest was Mellette, where 55 votes separated the two parties.

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Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.

Every district

DistrictDemocratVotesRepublicanVotesOthersMargin
At large Tim Bjorkman120,816 (36.0%) Dustin "Dusty" Johnson202,446 (60.3%) 12,209 R+24.3

The House vote in every county

CountyDemocratRepublicanOthersTotalMargin
Minnehaha 29,148 42.0% 37,768 54.4% 2,564 69,480 R+12.4
Pennington 14,092 34.1% 25,433 61.5% 1,821 41,346 R+27.4
Lincoln 8,266 34.4% 15,049 62.7% 690 24,005 R+28.3
Brown 5,482 38.5% 8,346 58.6% 411 14,239 R+20.1
Brookings 4,717 40.5% 6,418 55.1% 518 11,653 R+14.6
Lawrence 3,489 32.2% 6,868 63.3% 487 10,844 R+31.2
Codington 3,144 29.8% 7,129 67.5% 285 10,558 R+37.7
Meade 2,508 24.7% 7,160 70.6% 474 10,142 R+45.9
Yankton 3,383 38.1% 5,191 58.4% 308 8,882 R+20.4
Hughes 2,332 29.3% 5,366 67.4% 260 7,958 R+38.1
Davison 2,160 29.8% 4,807 66.3% 283 7,250 R+36.5
Union 2,152 32.5% 4,282 64.7% 185 6,619 R+32.2
Beadle 1,983 32.9% 3,825 63.4% 225 6,033 R+30.5
Lake 1,925 37.2% 3,110 60.2% 135 5,170 R+22.9
Clay 2,567 55.7% 1,906 41.4% 134 4,607 D+14.3
Custer 1,273 29.1% 2,944 67.2% 161 4,378 R+38.2
Turner 1,262 32.8% 2,467 64.1% 117 3,846 R+31.3
Butte 836 22.1% 2,799 74.0% 149 3,784 R+51.9
Roberts 1,664 45.2% 1,915 52.0% 105 3,684 R+6.8
Charles Mix 1,319 37.4% 2,085 59.1% 126 3,530 R+21.7
Hutchinson 883 27.0% 2,281 69.8% 106 3,270 R+42.8
Grant 945 29.6% 2,121 66.5% 123 3,189 R+36.9
Fall River 882 27.7% 2,149 67.5% 152 3,183 R+39.8
Oglala Lakota 2,473 83.5% 336 11.3% 152 2,961 D+72.2
Moody 1,090 38.6% 1,622 57.4% 113 2,825 R+18.8
Spink 958 34.5% 1,736 62.4% 86 2,780 R+28.0
Day 1,072 39.5% 1,541 56.7% 104 2,717 R+17.3
Bon Homme 940 34.7% 1,674 61.7% 97 2,711 R+27.1
Hamlin 695 25.7% 1,939 71.6% 74 2,708 R+45.9
McCook 1,047 42.1% 1,373 55.3% 64 2,484 R+13.1
Tripp 556 22.8% 1,814 74.3% 72 2,442 R+51.5
Kingsbury 855 35.2% 1,507 62.0% 70 2,432 R+26.8
Walworth 528 23.5% 1,648 73.4% 68 2,244 R+49.9
Todd 1,598 72.8% 506 23.1% 91 2,195 D+49.7
Brule 814 38.3% 1,231 58.0% 78 2,123 R+19.6
Gregory 586 27.6% 1,484 69.9% 52 2,122 R+42.3
Deuel 624 31.7% 1,272 64.6% 73 1,969 R+32.9
Marshall 860 44.2% 1,024 52.6% 61 1,945 R+8.4
Dewey 1,084 60.5% 623 34.7% 86 1,793 D+25.7
Edmunds 488 29.0% 1,147 68.1% 50 1,685 R+39.1
Clark 452 27.4% 1,150 69.7% 47 1,649 R+42.3
Hand 429 26.0% 1,171 71.0% 49 1,649 R+45.0
Hanson 536 33.6% 1,022 64.0% 38 1,596 R+30.5
Douglas 265 17.7% 1,162 77.8% 67 1,494 R+60.0
Stanley 377 25.5% 1,042 70.5% 60 1,479 R+45.0
Lyman 500 36.2% 830 60.0% 53 1,383 R+23.9
Perkins 224 16.8% 1,064 79.8% 45 1,333 R+63.0
Aurora 443 35.2% 728 57.8% 89 1,260 R+22.6
Potter 248 20.7% 923 77.2% 25 1,196 R+56.4
Miner 413 37.6% 642 58.4% 44 1,099 R+20.8
Corson 557 51.3% 484 44.6% 44 1,085 D+6.7
Bennett 438 40.7% 604 56.1% 35 1,077 R+15.4
Faulk 255 23.9% 780 73.2% 30 1,065 R+49.3
McPherson 216 20.6% 798 76.2% 33 1,047 R+55.6
Sanborn 292 28.7% 678 66.7% 47 1,017 R+38.0
Jackson 370 38.1% 575 59.2% 27 972 R+21.1
Haakon 117 12.4% 796 84.7% 27 940 R+72.2
Jerauld 312 34.4% 567 62.5% 28 907 R+28.1
Sully 182 22.5% 613 75.8% 14 809 R+53.3
Ziebach 417 52.3% 340 42.7% 40 797 D+9.7
Campbell 108 14.9% 601 82.9% 16 725 R+68.0
Mellette 303 43.3% 358 51.2% 38 699 R+7.9
Harding 94 13.8% 568 83.3% 20 682 R+69.5
Hyde 164 25.1% 462 70.8% 27 653 R+45.6
Jones 94 17.3% 420 77.5% 28 542 R+60.1
Buffalo 330 62.3% 172 32.5% 28 530 D+29.8

Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

South Dakota in every House election we hold

YearSeatsHouse vote
2024 D 0, R 1 R+44.1
2022 D 0, R 1 R+77.4
2020 D 0, R 1 R+81.0
2018 D 0, R 1 R+24.3
2016 D 0, R 1 R+28.2
2014 D 0, R 1 R+33.1
2012 D 0, R 1 R+14.9
2010 D 0, R 1 R+2.2
2008 D 1, R 0 D+35.1
2006 D 1, R 0 D+39.8
2004 D 1, R 0 D+7.4
2002 D 0, R 1 R+7.9
2000 D 0, R 1 R+48.5
1998 D 0, R 1 R+50.2
1996 D 0, R 1 R+20.7
1994 D 1, R 0 D+23.2
1992 D 1, R 0 D+42.3
1990 D 1, R 0 D+35.1