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United States · Election results history · 1966 Senate · South Dakota
Election 1966 Results

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1966 US Senate election in South Dakota

Karl E. Mundt (Republican) beat Donn H. Wright (Democrat) in South Dakota in 1966, 66.3% to 33.7%, a margin of 32.6 points and 73,954 votes.

The Republican hold continued from 1960, when Karl E. Mundt also won.

Republicans led in 66 of the 67 counties as they stood then and Democrats in 1. The largest, Minnehaha, cast 27,906 votes and went to the Republican by 30.4 points. The closest was Hanson, where 15 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
Karl E. Mundt won Republican 150,517 66.3%
Donn H. Wright Democratic 76,563 33.7%
Total227,080

Every county

CountyDemocratRepublicanOthersTotalMargin
Minnehaha 9,706 34.8% 18,200 65.2% 27,906 R+30.4
Brown 4,461 36.9% 7,626 63.1% 12,087 R+26.2
Pennington 3,323 27.8% 8,637 72.2% 11,960 R+44.4
Beadle 2,743 35.1% 5,071 64.9% 7,814 R+29.8
Codington 2,523 36.0% 4,486 64.0% 7,009 R+28.0
Davison 2,722 42.7% 3,652 57.3% 6,374 R+14.6
Brookings 1,586 26.7% 4,360 73.3% 5,946 R+46.7
Yankton 1,664 29.3% 4,006 70.7% 5,670 R+41.3
Lawrence 1,358 26.6% 3,746 73.4% 5,104 R+46.8
Lake 1,427 31.3% 3,125 68.7% 4,552 R+37.3
Hughes 1,177 27.1% 3,164 72.9% 4,341 R+45.8
Roberts 1,647 38.7% 2,605 61.3% 4,252 R+22.5
Lincoln 1,175 28.7% 2,926 71.3% 4,101 R+42.7
Spink 1,535 37.5% 2,558 62.5% 4,093 R+25.0
Hutchinson 1,178 28.8% 2,910 71.2% 4,088 R+42.4
Day 1,755 43.2% 2,311 56.8% 4,066 R+13.7
Turner 1,076 26.9% 2,922 73.1% 3,998 R+46.2
Bon Homme 1,406 36.5% 2,443 63.5% 3,849 R+26.9
Charles Mix 1,849 48.8% 1,943 51.2% 3,792 R+2.5
Grant 1,176 32.6% 2,429 67.4% 3,605 R+34.8
McCook 1,404 40.2% 2,087 59.8% 3,491 R+19.6
Clay 1,043 30.0% 2,433 70.0% 3,476 R+40.0
Kingsbury 1,046 30.1% 2,429 69.9% 3,475 R+39.8
Tripp 1,207 35.3% 2,217 64.7% 3,424 R+29.5
Walworth 957 29.3% 2,310 70.7% 3,267 R+41.4
Union 992 30.5% 2,263 69.5% 3,255 R+39.0
Meade 883 27.3% 2,351 72.7% 3,234 R+45.4
Gregory 1,187 38.8% 1,871 61.2% 3,058 R+22.4
Moody 1,075 35.5% 1,955 64.5% 3,030 R+29.0
Clark 988 33.9% 1,923 66.1% 2,911 R+32.1
Hand 816 30.2% 1,883 69.8% 2,699 R+39.5
Marshall 989 36.9% 1,692 63.1% 2,681 R+26.2
Edmunds 1,018 38.9% 1,597 61.1% 2,615 R+22.1
Butte 658 25.3% 1,942 74.7% 2,600 R+49.4
Hamlin 837 33.0% 1,696 67.0% 2,533 R+33.9
Brule 1,213 48.7% 1,279 51.3% 2,492 R+2.6
Deuel 771 32.7% 1,587 67.3% 2,358 R+34.6
McPherson 334 15.0% 1,900 85.0% 2,234 R+70.1
Miner 1,051 47.9% 1,141 52.1% 2,192 R+4.1
Perkins 608 28.0% 1,564 72.0% 2,172 R+44.0
Fall River 531 24.6% 1,626 75.4% 2,157 R+50.8
Aurora 1,109 52.0% 1,023 48.0% 2,132 D+4.0
Sanborn 893 44.6% 1,110 55.4% 2,003 R+10.8
Potter 484 24.5% 1,491 75.5% 1,975 R+51.0
Douglas 527 27.1% 1,416 72.9% 1,943 R+45.8
Lyman 678 36.6% 1,173 63.4% 1,851 R+26.7
Faulk 628 34.8% 1,179 65.2% 1,807 R+30.5
Custer 476 28.1% 1,215 71.9% 1,691 R+43.7
Corson 530 31.6% 1,145 68.4% 1,675 R+36.7
Hanson 822 49.5% 837 50.5% 1,659 R+0.9
Jerauld 616 37.6% 1,023 62.4% 1,639 R+24.8
Campbell 186 12.9% 1,261 87.1% 1,447 R+74.3
Dewey 486 33.8% 951 66.2% 1,437 R+32.4
Hyde 374 30.8% 842 69.2% 1,216 R+38.5
Todd 449 39.0% 702 61.0% 1,151 R+22.0
Haakon 284 26.2% 802 73.8% 1,086 R+47.7
Sully 287 27.5% 757 72.5% 1,044 R+45.0
Mellette 377 38.9% 592 61.1% 969 R+22.2
Stanley 369 38.6% 586 61.4% 955 R+22.7
Bennett 275 30.8% 617 69.2% 892 R+38.3
Jones 305 34.6% 577 65.4% 882 R+30.8
Shannon 380 46.2% 443 53.8% 823 R+7.7
Jackson 227 31.0% 506 69.0% 733 R+38.1
Harding 138 19.2% 580 80.8% 718 R+61.6
Ziebach 218 38.2% 353 61.8% 571 R+23.6
Buffalo 255 46.6% 292 53.4% 547 R+6.8
Washabaugh (Ext) 95 34.8% 178 65.2% 273 R+30.4

Counties as they stood in 1966; some have since been split, merged or renamed. 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