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United States · Election results history · 2012 Senate · Indiana
Election 2012 Results

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2012 US Senate election in Indiana

Joe Donnelly (Democrat) beat Richard Mourdock (Republican) in Indiana in 2012, 50.0% to 44.3%, a margin of 5.8 points and 147,560 votes.

Indiana changed party: in 2006 it went Republican, for Richard Lugar.

Republicans led in 66 of the 92 counties and Democrats in 26. The largest, Marion, cast 355,579 votes and went to the Democrat by 34.0 points. The closest was Floyd, where 34 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
Joe Donnelly won Democratic 1,281,181 50.0%
Richard Mourdock Republican 1,133,621 44.3%
Andy Horning Libertarian 145,282 5.7%
All other candidates 18 0.0%
Total2,560,102

Every county

CountyDemocratRepublicanOthersTotalMargin
Marion 227,858 64.1% 106,919 30.1% 20,802 355,579 D+34.0
Lake 126,736 69.3% 52,072 28.5% 4,108 182,916 D+40.8
Allen 65,053 45.3% 71,734 49.9% 6,939 143,726 R+4.6
Hamilton 52,925 39.5% 72,587 54.1% 8,580 134,092 R+14.7
St. Joseph 65,689 59.7% 40,418 36.7% 4,008 110,115 D+22.9
Porter 42,062 58.4% 27,481 38.1% 2,522 72,065 D+20.2
Vanderburgh 35,430 49.5% 32,947 46.1% 3,165 71,542 D+3.5
Elkhart 28,230 42.0% 35,858 53.4% 3,100 67,188 R+11.4
Hendricks 25,208 38.7% 35,541 54.6% 4,379 65,128 R+15.9
Johnson 21,256 37.2% 31,529 55.2% 4,282 57,067 R+18.0
Monroe 35,421 62.8% 17,633 31.3% 3,330 56,384 D+31.5
Tippecanoe 29,181 52.0% 23,130 41.2% 3,848 56,159 D+10.8
Madison 27,183 52.5% 20,422 39.4% 4,162 51,767 D+13.1
Clark 22,776 49.3% 21,120 45.8% 2,262 46,158 D+3.6
Delaware 24,525 56.5% 15,797 36.4% 3,052 43,374 D+20.1
LaPorte 26,764 62.8% 14,033 32.9% 1,830 42,627 D+29.9
Vigo 22,342 57.2% 14,233 36.4% 2,502 39,077 D+20.8
Floyd 16,602 47.8% 16,568 47.7% 1,554 34,724 D+0.1
Howard 17,660 51.8% 15,739 46.2% 684 34,083 D+5.6
Hancock 11,677 36.1% 17,635 54.5% 3,061 32,373 R+18.4
Kosciusko 8,239 27.7% 19,908 66.9% 1,598 29,745 R+39.2
Bartholomew 12,214 42.5% 14,430 50.2% 2,075 28,719 R+7.7
Morgan 9,777 35.0% 15,867 56.9% 2,254 27,898 R+21.8
Boone 10,251 37.5% 15,007 54.9% 2,066 27,324 R+17.4
Wayne 11,752 46.5% 11,529 45.6% 1,999 25,280 D+0.9
Grant 10,789 43.4% 12,549 50.4% 1,545 24,883 R+7.1
Warrick 10,569 43.5% 12,524 51.6% 1,198 24,291 R+8.0
Dearborn 7,313 33.7% 13,422 61.9% 956 21,691 R+28.2
Henry 8,914 47.6% 8,000 42.7% 1,816 18,730 D+4.9
Dubois 8,054 44.6% 9,143 50.6% 861 18,058 R+6.0
Marshall 7,867 44.6% 8,930 50.6% 836 17,633 R+6.0
Harrison 7,768 44.3% 9,005 51.4% 759 17,532 R+7.1
Lawrence 7,008 40.0% 9,365 53.4% 1,152 17,525 R+13.4
Jackson 7,045 42.8% 8,292 50.4% 1,108 16,445 R+7.6
Noble 5,939 37.4% 8,946 56.3% 1,006 15,891 R+18.9
DeKalb 6,059 38.1% 8,793 55.4% 1,033 15,885 R+17.2
Shelby 6,282 39.7% 8,083 51.1% 1,458 15,823 R+11.4
Huntington 5,166 34.0% 9,077 59.7% 963 15,206 R+25.7
Whitley 5,157 35.1% 8,584 58.4% 955 14,696 R+23.3
Knox 6,873 46.9% 6,959 47.5% 829 14,661 R+0.6
Gibson 6,339 43.3% 7,562 51.7% 728 14,629 R+8.4
Montgomery 5,291 37.0% 7,622 53.2% 1,401 14,314 R+16.3
Cass 6,323 44.9% 6,622 47.0% 1,135 14,080 R+2.1
Steuben 5,443 40.4% 7,056 52.4% 977 13,476 R+12.0
Putnam 5,196 39.8% 6,839 52.4% 1,008 13,043 R+12.6
Adams 4,613 36.0% 7,426 57.9% 784 12,823 R+21.9
Greene 5,480 42.7% 6,494 50.7% 845 12,819 R+7.9
Wabash 4,454 35.6% 7,287 58.2% 775 12,516 R+22.6
Miami 4,925 39.4% 6,363 50.9% 1,209 12,497 R+11.5
Jasper 5,335 42.7% 6,673 53.4% 480 12,488 R+10.7
Jefferson 6,104 49.5% 5,624 45.6% 610 12,338 D+3.9
Posey 5,605 46.3% 5,897 48.7% 613 12,115 R+2.4
Wells 3,668 31.1% 7,456 63.3% 663 11,787 R+32.1
Ripley 3,818 35.5% 6,394 59.5% 530 10,742 R+24.0
Washington 4,571 42.9% 5,512 51.8% 563 10,646 R+8.8
Clay 4,359 42.4% 5,192 50.5% 734 10,285 R+8.1
Franklin 3,512 34.4% 6,192 60.6% 509 10,213 R+26.2
Jennings 4,441 44.1% 4,937 49.0% 697 10,075 R+4.9
Daviess 3,295 33.5% 6,088 61.8% 463 9,846 R+28.4
White 4,291 43.9% 4,526 46.3% 968 9,785 R+2.4
Clinton 3,931 40.5% 4,938 50.9% 832 9,701 R+10.4
Decatur 3,478 36.2% 5,302 55.1% 840 9,620 R+19.0
Spencer 4,650 48.7% 4,451 46.6% 445 9,546 D+2.1
Randolph 4,073 43.1% 4,650 49.2% 722 9,445 R+6.1
LaGrange 3,300 35.8% 5,293 57.4% 626 9,219 R+21.6
Scott 4,552 53.2% 3,589 41.9% 422 8,563 D+11.2
Starke 4,484 52.5% 3,607 42.2% 448 8,539 D+10.3
Fulton 3,555 43.8% 4,123 50.9% 430 8,108 R+7.0
Sullivan 4,134 51.0% 3,491 43.1% 481 8,106 D+7.9
Fayette 3,856 47.9% 3,498 43.4% 699 8,053 D+4.4
Owen 3,270 41.0% 4,033 50.5% 678 7,981 R+9.6
Carroll 3,194 41.2% 3,916 50.5% 637 7,747 R+9.3
Perry 4,722 61.1% 2,660 34.4% 342 7,724 D+26.7
Orange 3,242 42.7% 3,959 52.2% 386 7,587 R+9.5
Brown 3,476 45.9% 3,544 46.8% 549 7,569 R+0.9
Jay 3,295 44.7% 3,533 48.0% 540 7,368 R+3.2
Tipton 3,001 41.7% 3,533 49.1% 664 7,198 R+7.4
Fountain 2,738 39.4% 3,541 50.9% 672 6,951 R+11.6
Rush 2,729 39.8% 3,392 49.5% 736 6,857 R+9.7
Vermillion 3,543 54.5% 2,490 38.3% 468 6,501 D+16.2
Parke 2,672 41.8% 3,168 49.5% 555 6,395 R+7.8
Pike 2,676 46.1% 2,781 47.9% 346 5,803 R+1.8
Newton 2,588 46.5% 2,719 48.8% 264 5,571 R+2.4
Pulaski 2,284 43.6% 2,640 50.4% 313 5,237 R+6.8
Blackford 2,228 47.7% 2,059 44.1% 379 4,666 D+3.6
Martin 1,796 38.5% 2,606 55.9% 260 4,662 R+17.4
Crawford 2,256 50.5% 2,000 44.8% 212 4,468 D+5.7
Warren 1,615 43.0% 1,887 50.3% 252 3,754 R+7.2
Benton 1,416 40.3% 1,798 51.1% 303 3,517 R+10.9
Switzerland 1,536 46.6% 1,581 48.0% 176 3,293 R+1.4
Union 1,098 36.4% 1,732 57.4% 185 3,015 R+21.0
Ohio 1,116 40.4% 1,536 55.6% 109 2,761 R+15.2

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

Indiana Senate elections we hold

YearWinnerMargin
2024 Jim Banks (R) R+19.9
2022 Todd Young (R) R+20.7
2018 Mike Braun (R) R+5.9
2016 Todd Young (R) R+9.7
2012 Joe Donnelly (D) D+5.8
2010 Dan Coats (R) R+14.6
2006 Richard Lugar (R) R+87.4
2004 Evan Bayh (D) D+24.4
2000 Richard G. Lugar (R) R+34.7
1998 Evan Bayh (D) D+28.9
1994 Richard G. Lugar (R) R+36.9
1992 Dan Coats (R) R+16.6
1988 Richard G. Lugar (R) R+36.3
1986 Dan Quayle (R) R+22.1
1982 Richard G. Lugar (R) R+8.2
1980 Dan Quayle (R) R+7.6
1976 Richard G. Lugar (R) R+18.8
1974 Birch Bayh (D) D+4.3
1970 R. Vance Hartke (D) D+0.2
1968 Birch Bayh (D) D+3.5
1964 R. Vance Hartke (D) D+9.0
1962 Birch Bayh (D) D+0.6
1958 R. Vance Hartke (D) D+14.0
1956 Homer E. Capehart (R) R+10.8
1952 William E. Jenner (R) R+5.6
1950 Homer E. Capehart (R) R+6.5
1946 William E. Jenner (R) R+11.5
1944 Homer E. Capehart (R) R+1.3
1940 Raymond E. Willis (R) R+1.3
1938 Frederick Van Nuys (D) D+0.3
1934 Sherman Minton (D) D+4.0
1932 Frederick Van Nuys (D) D+13.6
1928 Arthur R. Robinson (R) R+11.2
1926 James E. Watson (R) R+1.1
1922 Samuel M. Ralston (D) D+3.1
1920 James E. Watson (R) R+13.4
1916 Harry S. New (R) R+1.6
1914 Benjamin F. Shively (D) D+7.0