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United States · Election results history · 1966 Senate · Michigan
Election 1966 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.

1966 US Senate election in Michigan

Robert P. Griffin (Republican) beat G. Mennen Williams (Democrat) in Michigan in 1966, 55.9% to 43.8%, a margin of 12.1 points and 294,046 votes.

Michigan changed party: in 1960 it went Democratic, for Patrick McNamara.

Republicans led in 75 of the 83 counties as they stood then and Democrats in 8. The largest, Wayne, cast 770,959 votes and went to the Democrat by 15.4 points. The closest was Ontonagon, where 25 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
Robert P. Griffin won Republican 1,363,530 55.9%
G. Mennen Williams Democratic 1,069,484 43.8%
All other candidates 6,351 0.3%
Total2,439,365

Every county

CountyDemocratRepublicanOthersTotalMargin
Wayne 443,401 57.5% 325,040 42.2% 2,518 770,959 D+15.4
Oakland 84,550 35.1% 155,705 64.6% 787 241,042 R+29.5
Macomb 66,267 49.9% 66,223 49.8% 391 132,881 level
Genesee 53,918 45.0% 65,716 54.8% 214 119,848 R+9.8
Kent 38,991 33.0% 78,935 66.8% 208 118,134 R+33.8
Ingham 25,818 37.1% 43,566 62.6% 185 69,569 R+25.5
Saginaw 23,636 41.0% 33,940 58.8% 113 57,689 R+17.9
Washtenaw 18,965 33.5% 37,223 65.7% 479 56,667 R+32.2
Kalamazoo 16,865 32.1% 35,484 67.6% 142 52,491 R+35.5
Muskegon 18,981 39.4% 29,085 60.4% 104 48,170 R+21.0
Berrien 15,408 36.1% 27,164 63.6% 112 42,684 R+27.5
Calhoun 15,776 38.8% 24,764 61.0% 88 40,628 R+22.1
Jackson 13,701 34.8% 25,558 65.0% 69 39,328 R+30.1
Ottawa 8,474 22.7% 28,808 77.1% 61 37,343 R+54.5
Bay 15,295 47.7% 16,752 52.2% 42 32,089 R+4.5
St. Clair 10,834 33.9% 21,048 65.9% 62 31,944 R+32.0
Monroe 13,351 45.1% 16,200 54.7% 81 29,632 R+9.6
Lenawee 6,764 31.7% 14,551 68.2% 29 21,344 R+36.5
Midland 5,539 29.8% 13,022 70.0% 42 18,603 R+40.2
Allegan 4,875 26.9% 13,220 73.0% 26 18,121 R+46.1
Eaton 6,158 34.1% 11,857 65.7% 25 18,040 R+31.6
Shiawassee 6,665 38.9% 10,450 60.9% 31 17,146 R+22.1
Marquette 7,695 46.8% 8,711 53.0% 27 16,433 R+6.2
Van Buren 4,987 34.5% 9,438 65.3% 37 14,462 R+30.8
Livingston 4,551 32.5% 9,426 67.3% 27 14,004 R+34.8
Tuscola 4,183 31.6% 9,045 68.3% 15 13,243 R+36.7
Houghton 6,067 48.2% 6,511 51.7% 7 12,585 R+3.5
Ionia 4,438 36.4% 7,746 63.5% 12 12,196 R+27.1
St. Joseph 3,543 29.5% 8,445 70.3% 20 12,008 R+40.8
Clinton 4,099 34.4% 7,792 65.5% 13 11,904 R+31.0
Grand Traverse 3,201 27.3% 8,495 72.5% 17 11,713 R+45.2
Barry 3,868 33.5% 7,671 66.4% 16 11,555 R+32.9
Montcalm 3,694 32.4% 7,683 67.4% 15 11,392 R+35.0
Lapeer 3,784 33.2% 7,593 66.7% 14 11,391 R+33.4
Sanilac 2,694 24.0% 8,522 75.9% 11 11,227 R+51.9
Delta 5,482 49.0% 5,692 50.9% 10 11,184 R+1.9
Huron 3,286 29.8% 7,745 70.1% 12 11,043 R+40.4
Cass 4,371 41.4% 6,150 58.3% 29 10,550 R+16.9
Gratiot 3,041 29.7% 7,194 70.2% 14 10,249 R+40.5
Hillsdale 2,827 28.2% 7,186 71.7% 10 10,023 R+43.5
Branch 3,241 34.3% 6,185 65.5% 11 9,437 R+31.2
Isabella 3,069 32.9% 6,254 67.0% 14 9,337 R+34.1
Dickinson 4,556 49.3% 4,672 50.6% 14 9,242 R+1.3
Alpena 3,472 38.1% 5,639 61.8% 9 9,120 R+23.8
Gogebic 4,610 52.3% 4,193 47.5% 17 8,820 D+4.7
Newaygo 2,483 28.4% 6,255 71.5% 5 8,743 R+43.1
Chippewa 3,340 40.3% 4,929 59.5% 9 8,278 R+19.2
Mason 3,267 39.6% 4,982 60.3% 7 8,256 R+20.8
Menominee 3,546 45.6% 4,222 54.3% 13 7,781 R+8.7
Manistee 2,777 38.1% 4,502 61.8% 5 7,284 R+23.7
Iron 3,552 53.3% 3,094 46.5% 12 6,658 D+6.9
Mecosta 1,930 30.6% 4,358 69.2% 9 6,297 R+38.6
Wexford 2,036 32.8% 4,162 67.0% 13 6,211 R+34.2
Oceana 1,816 31.5% 3,952 68.5% 5 5,773 R+37.0
Emmet 1,881 32.7% 3,868 67.2% 3 5,752 R+34.5
Iosco 1,835 33.4% 3,658 66.6% 1 5,494 R+33.2
Cheboygan 2,087 39.4% 3,211 60.6% 4 5,302 R+21.2
Charlevoix 1,749 34.2% 3,361 65.7% 3 5,113 R+31.5
Osceola 1,192 26.2% 3,359 73.7% 4 4,555 R+47.6
Ontonagon 2,197 50.2% 2,172 49.7% 4 4,373 D+0.6
Presque Isle 1,933 45.1% 2,355 54.9% 4,288 R+9.8
Clare 1,395 33.3% 2,785 66.5% 9 4,189 R+33.2
Antrim 1,184 29.4% 2,833 70.5% 4 4,021 R+41.0
Mackinac 1,461 37.0% 2,479 62.8% 8 3,948 R+25.8
Leelanau 1,183 31.1% 2,624 68.9% 2 3,809 R+37.8
Gladwin 1,297 34.8% 2,427 65.1% 5 3,729 R+30.3
Ogemaw 1,345 38.1% 2,183 61.9% 3,528 R+23.8
Roscommon 1,132 33.6% 2,240 66.4% 2 3,374 R+32.8
Schoolcraft 1,514 45.7% 1,796 54.2% 3 3,313 R+8.5
Arenac 1,266 39.3% 1,946 60.5% 7 3,219 R+21.1
Benzie 852 28.8% 2,100 71.0% 4 2,956 R+42.2
Otsego 1,176 39.8% 1,779 60.2% 1 2,956 R+20.4
Alger 1,495 51.5% 1,409 48.5% 2,904 D+3.0
Baraga 1,402 48.6% 1,477 51.2% 8 2,887 R+2.6
Missaukee 615 23.3% 2,020 76.6% 3 2,638 R+53.3
Lake 1,168 51.4% 1,101 48.4% 4 2,273 D+2.9
Alcona 751 33.4% 1,496 66.5% 3 2,250 R+33.1
Luce 702 37.0% 1,194 62.9% 3 1,899 R+25.9
Montmorency 696 36.9% 1,191 63.1% 1 1,888 R+26.2
Kalkaska 592 34.3% 1,134 65.7% 1,726 R+31.4
Crawford 586 35.3% 1,071 64.6% 2 1,659 R+29.2
Oscoda 410 29.1% 997 70.7% 3 1,410 R+41.6
Keweenaw 650 56.0% 509 43.8% 2 1,161 D+12.1

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.

Michigan Senate elections we hold

YearWinnerMargin
2024 Elissa Slotkin (D) D+0.3
2020 Gary Peters (D) D+1.7
2018 Debbie Stabenow (D) D+6.5
2014 Gary C. Peters (D) D+13.3
2012 Debbie Stabenow (D) D+20.8
2008 Carl Levin (D) D+28.8
2006 Debbie Stabenow (D) D+15.7
2002 Carl Levin (D) D+22.7
2000 Debbie Stabenow (D) D+1.6
1996 Carl Levin (D) D+18.5
1994 Spencer Abraham (R) R+9.1
1990 Carl Levin (D) D+16.2
1988 Donald W. Riegle, Jr. (D) D+21.9
1984 Carl Levin (D) D+4.6
1982 Donald W. Riegle, Jr. (D) D+16.9
1978 Carl Levin (D) D+4.3
1976 Donald W. Riegle, Jr. (D) D+5.6
1972 Robert P. Griffin (R) R+6.0
1970 Philip A. Hart (D) D+33.9
1966 Robert P. Griffin (R) R+12.1
1964 Philip A. Hart (D) D+29.0
1960 Patrick McNamara (D) D+3.7
1958 Philip A. Hart (D) D+7.5
1954 Patrick McNamara (D) D+1.8
1952 Charles Potter (R) R+1.6
1948 Homer Ferguson (R) R+2.2
1946 Arthur Vandenberg (R) R+35.1
1942 Homer Ferguson (R) R+2.4
1940 Arthur Vandenberg (R) R+5.7
1936 Prentiss Brown (D) D+11.5
1934 Arthur Vandenberg (R) R+4.3
1930 James Couzens (R) R+57.2
1928 Arthur Vandenberg (R) R+44.1
1924 James Couzens (R) R+49.7
1922 Woodbridge Ferris (D) D+2.2
1918 Truman H. Newberry (R) R+1.7
1916 Charles E. Townsend (R) R+16.5