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United States · Election results history · 2010 Senate · Wisconsin
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 Wisconsin

Ron Johnson (Republican) beat Russell D. Feingold (Democrat) in Wisconsin in 2010, 51.9% to 47.0%, a margin of 4.8 points and 105,175 votes.

Wisconsin changed party: in 2004 it went Democratic, for Russel D. Feingold.

Republicans led in 57 of the 72 counties and Democrats in 15. The largest, Milwaukee, cast 341,571 votes and went to the Democrat by 23.3 points. The closest was Forest, where 35 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
Ron Johnson won Republican 1,126,133 51.9%
Russell D. Feingold Democratic 1,020,958 47.0%
All other candidates 24,240 1.1%
Total2,171,331

Every county

CountyDemocratRepublicanOthersTotalMargin
Milwaukee 209,394 61.3% 129,844 38.0% 2,333 341,571 D+23.3
Dane 153,913 69.5% 65,894 29.8% 1,639 221,446 D+39.7
Waukesha 53,492 28.3% 134,051 71.0% 1,331 188,874 R+42.7
Brown 37,394 42.0% 50,792 57.0% 940 89,126 R+15.0
Racine 31,779 43.4% 40,762 55.7% 622 73,163 R+12.3
Outagamie 28,738 43.8% 36,146 55.0% 791 65,675 R+11.3
Winnebago 26,869 43.7% 33,967 55.2% 667 61,503 R+11.5
Washington 14,645 24.8% 44,107 74.7% 326 59,078 R+49.9
Rock 28,359 54.1% 23,178 44.2% 875 52,412 D+9.9
Marathon 21,130 42.6% 27,674 55.8% 834 49,638 R+13.2
Kenosha 22,996 46.8% 25,479 51.9% 627 49,102 R+5.1
Sheboygan 17,175 36.5% 29,358 62.4% 486 47,019 R+25.9
Ozaukee 13,495 31.1% 29,753 68.5% 204 43,452 R+37.4
La Crosse 21,315 50.3% 20,480 48.3% 573 42,368 D+2.0
Fond du Lac 12,834 33.7% 24,867 65.3% 397 38,098 R+31.6
Eau Claire 18,814 50.5% 17,921 48.1% 540 37,275 D+2.4
Walworth 12,398 35.2% 22,455 63.7% 391 35,244 R+28.5
Jefferson 12,326 39.1% 18,778 59.5% 459 31,563 R+20.4
Dodge 10,421 33.3% 20,502 65.6% 329 31,252 R+32.3
Manitowoc 12,458 40.7% 17,713 57.9% 415 30,586 R+17.2
Wood 12,202 42.8% 15,702 55.1% 619 28,523 R+12.3
St. Croix 10,585 37.5% 17,162 60.8% 476 28,223 R+23.3
Portage 14,821 53.3% 12,647 45.5% 339 27,807 D+7.8
Sauk 11,188 50.0% 10,856 48.5% 350 22,394 D+1.5
Columbia 10,525 48.9% 10,748 50.0% 234 21,507 R+1.0
Chippewa 9,164 43.0% 11,792 55.3% 364 21,320 R+12.3
Calumet 7,156 38.4% 11,224 60.3% 237 18,617 R+21.9
Waupaca 7,062 39.2% 10,731 59.6% 204 17,997 R+20.4
Grant 7,948 47.5% 8,472 50.7% 306 16,726 R+3.1
Oneida 7,008 43.9% 8,610 54.0% 340 15,958 R+10.0
Barron 6,855 43.5% 8,446 53.6% 462 15,763 R+10.1
Douglas 8,653 56.7% 6,289 41.2% 310 15,252 D+15.5
Polk 5,884 39.3% 8,719 58.3% 364 14,967 R+18.9
Marinette 6,214 42.3% 8,317 56.7% 144 14,675 R+14.3
Shawano 5,504 38.0% 8,772 60.5% 215 14,491 R+22.6
Door 6,809 48.6% 7,081 50.5% 120 14,010 R+1.9
Oconto 5,387 39.1% 8,191 59.5% 195 13,773 R+20.4
Dunn 6,087 44.7% 7,224 53.0% 312 13,623 R+8.3
Pierce 5,952 44.6% 7,058 52.9% 327 13,337 R+8.3
Green 7,047 53.0% 6,105 45.9% 152 13,304 D+7.1
Monroe 5,434 41.0% 7,519 56.7% 302 13,255 R+15.7
Lincoln 4,946 43.4% 6,202 54.5% 236 11,384 R+11.0
Vernon 5,547 50.2% 5,323 48.2% 176 11,046 D+2.0
Clark 4,181 39.3% 6,162 57.9% 295 10,638 R+18.6
Vilas 3,949 37.2% 6,552 61.7% 111 10,612 R+24.5
Trempealeau 4,979 49.0% 5,027 49.5% 147 10,153 R+0.5
Iowa 4,974 56.6% 3,730 42.4% 83 8,787 D+14.2
Waushara 3,290 38.0% 5,248 60.6% 117 8,655 R+22.6
Kewaunee 3,470 42.1% 4,612 56.0% 160 8,242 R+13.9
Juneau 3,311 41.3% 4,594 57.3% 110 8,015 R+16.0
Langlade 2,883 39.0% 4,432 59.9% 84 7,399 R+20.9
Adams 3,461 47.0% 3,796 51.6% 105 7,362 R+4.6
Bayfield 4,270 58.6% 2,882 39.6% 129 7,281 D+19.1
Green Lake 2,249 32.0% 4,693 66.7% 92 7,034 R+34.7
Taylor 2,596 37.9% 4,085 59.7% 165 6,846 R+21.7
Jackson 3,301 48.3% 3,438 50.3% 96 6,835 R+2.0
Washburn 2,957 45.2% 3,485 53.3% 99 6,541 R+8.1
Sawyer 2,743 42.1% 3,702 56.8% 70 6,515 R+14.7
Price 3,089 47.9% 3,222 50.0% 136 6,447 R+2.1
Richland 2,980 47.1% 3,294 52.1% 53 6,327 R+5.0
Burnett 2,550 41.6% 3,452 56.3% 129 6,131 R+14.7
Marquette 2,430 40.3% 3,525 58.4% 79 6,034 R+18.1
Ashland 3,734 62.5% 2,156 36.1% 89 5,979 D+26.4
Crawford 3,104 52.0% 2,768 46.4% 93 5,965 D+5.6
Lafayette 2,692 47.6% 2,890 51.1% 72 5,654 R+3.5
Rusk 2,363 43.2% 2,988 54.6% 120 5,471 R+11.4
Buffalo 2,196 44.6% 2,631 53.5% 92 4,919 R+8.8
Forest 1,687 49.1% 1,722 50.1% 30 3,439 R+1.0
Iron 1,175 46.7% 1,321 52.5% 18 2,514 R+5.8
Pepin 1,118 46.0% 1,280 52.7% 33 2,431 R+6.7
Florence 645 34.8% 1,187 64.1% 19 1,851 R+29.3
Menominee 595 78.2% 159 20.9% 7 761 D+57.3

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

Wisconsin Senate elections we hold

YearWinnerMargin
2024 Tammy Baldwin (D) D+0.8
2022 Ron Johnson (R) R+1.0
2018 Tammy Baldwin (D) D+10.8
2016 Ron Johnson (R) R+3.4
2012 Tammy Baldwin (D) D+5.5
2010 Ron Johnson (R) R+4.8
2006 Herb Kohl (D) D+37.8
2004 Russel D. Feingold (D) D+11.2
2000 Herb Kohl (D) D+24.5
1998 Russell D. Feingold (D) D+2.1
1994 Herb Kohl (D) D+17.6
1992 Russell D. Feingold (D) D+6.6
1988 Herbert H. Kohl (D) D+4.5
1986 Robert W. Kasten Jr. (R) R+3.5
1982 William Proxmire (D) D+29.5
1980 Robert W. Kasten Jr. (R) R+1.9
1976 William Proxmire (D) D+45.6
1974 Gaylord Nelson (D) D+26.0
1970 William Proxmire (D) D+42.4
1968 Gaylord Nelson (D) D+23.4
1964 William Proxmire (D) D+6.7
1962 Gaylord Nelson (D) D+5.4
1958 William Proxmire (D) D+14.4
1956 Alexander Wiley (R) R+17.4
1952 Joseph McCarthy (R) R+8.7
1950 Alexander Wiley (R) R+7.1
1946 Joseph McCarthy (R) R+23.9
1944 Alexander Wiley (R) R+7.7
1940 Robert M. La Follette Jr. (other)
1938 Alexander Wiley (R) R+20.4
1934 Robert M. La Follette Jr. (other)
1932 F. Ryan Duffy (D) D+20.8
1928 Robert La Follette Jr. (R) R+85.6
1926 John J. Blaine (R) R+42.7
1922 Robert La Follette Sr. (R) R+64.1
1920 Irvine L. Lenroot (R) R+28.4
1916 Robert La Follette Sr. (R) R+27.3
1914 Paul O. Husting (D) D+0.3