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United States · Election results history · 2010 Senate · South Dakota
Election 2010 Results

Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.

2010 US Senate election in South Dakota

John Thune (Republican) won in South Dakota in 2010 with 100.0% of the vote and no opponent from the other main party.

The Republican hold continued from 2004, when John Thune also won.

Republicans led in 66 of the 66 counties. The largest, Minnehaha, cast 44,085 votes and went to the Republican by 100.0 points. The closest was Buffalo, where 208 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.

Senate

CandidatePartyVotesShare
John Thune won Republican 227,947 100.0%
Total227,947

Every county

CountyDemocratRepublicanOthersTotalMargin
Minnehaha 0 0.0% 44,085 100.0% 44,085 R+100.0
Pennington 0 0.0% 27,928 100.0% 27,928 R+100.0
Lincoln 0 0.0% 13,642 100.0% 13,642 R+100.0
Brown 0 0.0% 9,862 100.0% 9,862 R+100.0
Brookings 0 0.0% 7,721 100.0% 7,721 R+100.0
Codington 0 0.0% 7,504 100.0% 7,504 R+100.0
Lawrence 0 0.0% 7,491 100.0% 7,491 R+100.0
Meade 0 0.0% 7,360 100.0% 7,360 R+100.0
Yankton 0 0.0% 6,063 100.0% 6,063 R+100.0
Hughes 0 0.0% 5,893 100.0% 5,893 R+100.0
Davison 0 0.0% 5,480 100.0% 5,480 R+100.0
Beadle 0 0.0% 4,897 100.0% 4,897 R+100.0
Union 0 0.0% 4,522 100.0% 4,522 R+100.0
Lake 0 0.0% 3,700 100.0% 3,700 R+100.0
Custer 0 0.0% 3,018 100.0% 3,018 R+100.0
Butte 0 0.0% 2,975 100.0% 2,975 R+100.0
Turner 0 0.0% 2,778 100.0% 2,778 R+100.0
Clay 0 0.0% 2,756 100.0% 2,756 R+100.0
Grant 0 0.0% 2,538 100.0% 2,538 R+100.0
Charles Mix 0 0.0% 2,518 100.0% 2,518 R+100.0
Roberts 0 0.0% 2,498 100.0% 2,498 R+100.0
Hutchinson 0 0.0% 2,486 100.0% 2,486 R+100.0
Fall River 0 0.0% 2,336 100.0% 2,336 R+100.0
Spink 0 0.0% 2,055 100.0% 2,055 R+100.0
Hamlin 0 0.0% 1,969 100.0% 1,969 R+100.0
Bon Homme 0 0.0% 1,965 100.0% 1,965 R+100.0
Tripp 0 0.0% 1,925 100.0% 1,925 R+100.0
Moody 0 0.0% 1,822 100.0% 1,822 R+100.0
McCook 0 0.0% 1,759 100.0% 1,759 R+100.0
Walworth 0 0.0% 1,745 100.0% 1,745 R+100.0
Kingsbury 0 0.0% 1,707 100.0% 1,707 R+100.0
Day 0 0.0% 1,673 100.0% 1,673 R+100.0
Gregory 0 0.0% 1,549 100.0% 1,549 R+100.0
Brule 0 0.0% 1,525 100.0% 1,525 R+100.0
Deuel 0 0.0% 1,427 100.0% 1,427 R+100.0
Hand 0 0.0% 1,393 100.0% 1,393 R+100.0
Douglas 0 0.0% 1,360 100.0% 1,360 R+100.0
Hanson 0 0.0% 1,323 100.0% 1,323 R+100.0
Edmunds 0 0.0% 1,275 100.0% 1,275 R+100.0
Clark 0 0.0% 1,190 100.0% 1,190 R+100.0
Marshall 0 0.0% 1,186 100.0% 1,186 R+100.0
Perkins 0 0.0% 1,088 100.0% 1,088 R+100.0
Stanley 0 0.0% 1,062 100.0% 1,062 R+100.0
Potter 0 0.0% 1,035 100.0% 1,035 R+100.0
Lyman 0 0.0% 1,012 100.0% 1,012 R+100.0
Todd 0 0.0% 1,009 100.0% 1,009 R+100.0
McPherson 0 0.0% 990 100.0% 990 R+100.0
Dewey 0 0.0% 943 100.0% 943 R+100.0
Aurora 0 0.0% 926 100.0% 926 R+100.0
Haakon 0 0.0% 890 100.0% 890 R+100.0
Oglala Lakota 0 0.0% 854 100.0% 854 R+100.0
Sanborn 0 0.0% 854 100.0% 854 R+100.0
Faulk 0 0.0% 798 100.0% 798 R+100.0
Jerauld 0 0.0% 759 100.0% 759 R+100.0
Jackson 0 0.0% 734 100.0% 734 R+100.0
Bennett 0 0.0% 728 100.0% 728 R+100.0
Miner 0 0.0% 725 100.0% 725 R+100.0
Campbell 0 0.0% 642 100.0% 642 R+100.0
Sully 0 0.0% 600 100.0% 600 R+100.0
Harding 0 0.0% 583 100.0% 583 R+100.0
Corson 0 0.0% 577 100.0% 577 R+100.0
Hyde 0 0.0% 558 100.0% 558 R+100.0
Mellette 0 0.0% 543 100.0% 543 R+100.0
Jones 0 0.0% 507 100.0% 507 R+100.0
Ziebach 0 0.0% 423 100.0% 423 R+100.0
Buffalo 0 0.0% 208 100.0% 208 R+100.0

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

South Dakota Senate elections we hold

YearWinnerMargin
2022 John R Thune (R) R+43.5
2020 Mike Rounds (R) R+31.5
2016 John R. Thune (R) R+43.7
2014 Mike Rounds (R) R+20.9
2010 John Thune (R) R+100.0
2008 Tim Johnson (D) D+25.0
2004 John Thune (R) R+1.2
2002 Tim Johnson (D) D+0.2
1998 Tom Daschle (D) D+25.7
1996 Tim Johnson (D) D+2.6
1992 Thomas A. Daschle (D) D+32.4
1990 Larry Pressler (R) R+7.3
1986 Thomas A. Daschle (D) D+3.2
1984 Larry Pressler (R) R+49.0
1980 James Abdnor (R) R+18.8
1978 Larry Pressler (R) R+33.7
1974 George McGovern (D) D+6.1
1972 James Abourezk (D) D+14.1
1968 George McGovern (D) D+13.6
1966 Karl E. Mundt (R) R+32.6
1962 George McGovern (D) D+0.2
1960 Karl E. Mundt (R) R+4.9
1956 Francis Case (R) R+1.6
1954 Karl E. Mundt (R) R+14.6
1950 Francis Case (R) R+27.8
1948 Karl E. Mundt (R) R+18.7
1944 Chandler Gurney (R) R+27.7
1942 Harlan J. Bushfield (R) R+17.5
1938 Chandler Gurney (R) R+4.9
1936 William J. Bulow (D) D+2.1
1932 Peter Norbeck (R) R+9.3
1930 William J. Bulow (D) D+3.3
1926 Peter Norbeck (R) R+26.2
1924 William H. McMaster (R) R+13.3
1920 Peter Norbeck (R) R+30.1
1918 Thomas Sterling (R) R+16.1
1914 Edwin S. Johnson (D) D+3.5