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United States · Election results history · 2016 Senate · Illinois
Election 2016 Results

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2016 US Senate election in Illinois

Tammy Duckworth (Democrat) beat Mark Kirk (Republican) in Illinois in 2016, 54.9% to 39.8%, a margin of 15.1 points and 828,248 votes.

Illinois changed party: in 2010 it went Republican, for Mark Kirk.

Republicans led in 85 of the 102 counties and Democrats in 17. The largest, Cook, cast 2,132,957 votes and went to the Democrat by 45.6 points. The closest was Gallatin, where 57 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
Tammy Duckworth won Democratic 3,012,940 54.9%
Mark Kirk Republican 2,184,692 39.8%
All other candidates 294,246 5.4%
Total5,491,878

Every county

CountyDemocratRepublicanOthersTotalMargin
Cook 1,502,361 70.4% 529,781 24.8% 100,815 2,132,957 D+45.6
DuPage 209,379 49.2% 193,069 45.4% 23,110 425,558 D+3.8
Lake 150,921 50.2% 135,334 45.0% 14,271 300,526 D+5.2
Will 153,378 51.2% 127,473 42.5% 18,821 299,672 D+8.6
Kane 97,148 49.1% 87,886 44.5% 12,626 197,660 D+4.7
McHenry 58,815 41.5% 72,296 51.1% 10,455 141,566 R+9.5
Madison 64,398 50.4% 56,665 44.4% 6,621 127,684 D+6.1
St. Clair 68,864 57.3% 45,998 38.3% 5,314 120,176 D+19.0
Winnebago 52,864 44.7% 57,643 48.7% 7,791 118,298 R+4.0
Sangamon 40,072 41.2% 51,849 53.3% 5,399 97,320 R+12.1
Champaign 45,884 51.1% 38,731 43.1% 5,201 89,816 D+8.0
McLean 33,335 41.5% 41,579 51.8% 5,347 80,261 R+10.3
Peoria 36,548 46.1% 38,169 48.2% 4,546 79,263 R+2.0
Tazewell 21,292 33.2% 38,386 59.8% 4,467 64,145 R+26.6
Rock Island 33,033 52.4% 26,767 42.5% 3,182 62,982 D+9.9
Kendall 24,137 45.4% 25,202 47.4% 3,822 53,161 R+2.0
LaSalle 22,150 45.5% 23,471 48.3% 3,013 48,634 R+2.7
Macon 18,653 39.4% 26,114 55.1% 2,633 47,400 R+15.7
Kankakee 20,945 45.0% 22,850 49.1% 2,772 46,567 R+4.1
DeKalb 20,111 46.9% 19,355 45.1% 3,403 42,869 D+1.8
Adams 12,394 39.1% 18,094 57.0% 1,247 31,735 R+18.0
Williamson 13,556 43.5% 16,075 51.6% 1,537 31,168 R+8.1
Vermilion 10,535 34.6% 18,076 59.4% 1,825 30,436 R+24.8
Whiteside 11,692 46.4% 12,149 48.2% 1,371 25,212 R+1.8
Jackson 13,770 57.0% 8,938 37.0% 1,458 24,166 D+20.0
Henry 9,512 39.6% 13,214 54.9% 1,322 24,048 R+15.4
Ogle 7,688 32.1% 14,768 61.7% 1,476 23,932 R+29.6
Grundy 9,508 41.6% 11,624 50.9% 1,721 22,853 R+9.3
Boone 8,536 37.8% 12,520 55.4% 1,550 22,606 R+17.6
Knox 10,668 48.0% 10,350 46.6% 1,200 22,218 D+1.4
Macoupin 10,289 46.9% 10,550 48.1% 1,080 21,919 R+1.2
Coles 7,531 35.1% 12,555 58.5% 1,371 21,457 R+23.4
Stephenson 7,425 36.9% 11,453 56.9% 1,239 20,117 R+20.0
Woodford 5,113 26.1% 13,291 67.8% 1,202 19,606 R+41.7
Monroe 7,478 39.2% 10,885 57.0% 719 19,082 R+17.9
Franklin 8,556 46.6% 8,894 48.5% 893 18,343 R+1.8
Effingham 3,832 22.2% 12,520 72.4% 935 17,287 R+50.3
Clinton 6,426 37.4% 10,049 58.5% 695 17,170 R+21.1
Marion 6,839 40.9% 9,162 54.8% 722 16,723 R+13.9
Jefferson 6,922 41.7% 8,790 52.9% 889 16,601 R+11.3
Bureau 6,857 42.2% 8,434 51.9% 948 16,239 R+9.7
Fulton 6,731 43.1% 7,702 49.4% 1,167 15,600 R+6.2
Lee 5,599 36.7% 8,640 56.6% 1,027 15,266 R+19.9
Christian 4,890 32.2% 9,316 61.3% 989 15,195 R+29.1
Livingston 4,038 26.6% 10,169 67.1% 952 15,159 R+40.4
Morgan 4,746 32.4% 9,112 62.2% 789 14,647 R+29.8
Randolph 6,129 43.8% 7,364 52.6% 504 13,997 R+8.8
McDonough 6,265 48.5% 5,917 45.8% 729 12,911 D+2.7
Iroquois 2,769 21.5% 9,379 72.7% 755 12,903 R+51.2
Montgomery 5,385 42.4% 6,662 52.5% 647 12,694 R+10.1
Logan 3,293 26.9% 8,236 67.2% 720 12,249 R+40.4
Jo Daviess 4,532 40.8% 5,988 53.9% 590 11,110 R+13.1
Shelby 2,742 25.2% 7,418 68.3% 704 10,864 R+43.0
Saline 4,807 44.3% 5,612 51.7% 439 10,858 R+7.4
Jersey 4,248 39.9% 5,840 54.8% 561 10,649 R+14.9
Perry 4,283 44.4% 4,925 51.0% 446 9,654 R+6.7
Fayette 3,211 34.2% 5,751 61.2% 431 9,393 R+27.0
Piatt 2,570 28.6% 5,954 66.2% 471 8,995 R+37.6
Hancock 3,399 38.1% 5,127 57.4% 404 8,930 R+19.4
Crawford 2,650 31.0% 5,455 63.9% 437 8,542 R+32.8
Union 3,843 45.6% 4,231 50.2% 361 8,435 R+4.6
Mercer 3,396 40.7% 4,465 53.5% 479 8,340 R+12.8
Douglas 1,980 24.5% 5,599 69.3% 498 8,077 R+44.8
Wayne 1,924 24.2% 5,616 70.7% 403 7,943 R+46.5
Clark 2,405 31.0% 4,953 63.9% 390 7,748 R+32.9
Edgar 2,035 26.3% 5,290 68.3% 422 7,747 R+42.0
Warren 3,037 39.3% 4,184 54.2% 505 7,726 R+14.8
De Witt 1,952 26.1% 5,009 67.0% 514 7,475 R+40.9
Richland 2,210 29.6% 4,900 65.7% 351 7,461 R+36.1
Bond 3,206 43.0% 3,841 51.6% 404 7,451 R+8.5
Pike 2,661 36.1% 4,377 59.4% 335 7,373 R+23.3
Carroll 2,581 35.2% 4,354 59.4% 394 7,329 R+24.2
Washington 2,561 35.2% 4,417 60.8% 290 7,268 R+25.5
White 2,414 34.0% 4,356 61.4% 323 7,093 R+27.4
Massac 2,463 37.7% 3,739 57.2% 330 6,532 R+19.5
Menard 1,781 27.8% 4,278 66.7% 352 6,411 R+38.9
Mason 2,304 36.0% 3,708 58.0% 381 6,393 R+22.0
Ford 1,426 22.5% 4,507 71.2% 400 6,333 R+48.6
Moultrie 1,578 25.5% 4,264 68.8% 358 6,200 R+43.3
Clay 1,922 31.5% 3,905 64.0% 277 6,104 R+32.5
Johnson 2,061 34.7% 3,572 60.1% 309 5,942 R+25.4
Marshall 1,926 32.7% 3,588 60.8% 384 5,898 R+28.2
Lawrence 1,945 33.0% 3,701 62.8% 244 5,890 R+29.8
Cumberland 1,334 24.2% 3,797 69.0% 373 5,504 R+44.7
Greene 2,030 37.5% 3,064 56.6% 320 5,414 R+19.1
Wabash 1,547 29.3% 3,500 66.4% 227 5,274 R+37.0
Cass 1,804 35.9% 2,917 58.1% 303 5,024 R+22.2
Jasper 1,423 28.8% 3,312 66.9% 214 4,949 R+38.2
Hamilton 1,632 41.2% 2,171 54.8% 161 3,964 R+13.6
Schuyler 1,617 43.1% 1,943 51.8% 192 3,752 R+8.7
Henderson 1,410 41.1% 1,820 53.1% 199 3,429 R+12.0
Edwards 735 23.0% 2,322 72.7% 135 3,192 R+49.7
Putnam 1,257 41.7% 1,587 52.7% 169 3,013 R+11.0
Alexander 1,511 55.5% 1,121 41.2% 91 2,723 D+14.3
Stark 786 29.1% 1,760 65.1% 159 2,705 R+36.0
Pulaski 1,400 52.2% 1,206 45.0% 75 2,681 D+7.2
Scott 848 33.1% 1,606 62.7% 107 2,561 R+29.6
Gallatin 1,266 49.5% 1,209 47.2% 85 2,560 D+2.2
Calhoun 1,273 51.4% 1,131 45.7% 73 2,477 D+5.7
Brown 795 35.0% 1,380 60.7% 98 2,273 R+25.7
Hardin 868 41.9% 1,137 54.9% 67 2,072 R+13.0
Pope 704 34.1% 1,279 61.9% 84 2,067 R+27.8

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

Illinois Senate elections we hold

YearWinnerMargin
2022 Tammy Duckworth (D) D+15.3
2020 Richard J Durbin (D) D+16.0
2016 Tammy Duckworth (D) D+15.1
2014 Dick Durbin (D) D+10.9
2010 Mark Kirk (R) R+1.6
2008 Richard J. Durbin (D) D+39.3
2004 Barack Obama (D) D+42.9
2002 Richard J. Durbin (D) D+22.3
1998 Peter G. Fitzgerald (R) R+2.9
1996 Richard J. Durbin (D) D+15.4
1992 Carol Moseley-Braun (D) D+10.2
1990 Paul Simon (D) D+30.1
1986 Alan J. Dixon (D) D+31.4
1984 Paul Simon (D) D+1.9
1980 Alan J. Dixon (D) D+13.5
1978 Charles H. Percy (R) R+7.9
1974 Adlai Stevenson III (D) D+24.9
1972 Charles H. Percy (R) R+24.9
1968 Everett Dirksen (R) R+6.4
1966 Charles H. Percy (R) R+11.0
1962 Everett Dirksen (R) R+5.7
1960 Paul H. Douglas (D) D+9.4
1956 Everett Dirksen (R) R+8.4
1954 Paul H. Douglas (D) D+7.1
1950 Everett Dirksen (R) R+8.1
1948 Paul H. Douglas (D) D+10.5
1944 Scott W. Lucas (D) D+5.6
1942 C. Wayland Brooks (R) R+6.8
1938 Scott W. Lucas (D) D+3.0
1936 James H. Lewis (D) D+15.8
1932 William H. Dieterich (D) D+6.2
1930 James H. Lewis (D) D+33.3
1926 Frank L. Smith (R) R+3.7
1924 Charles S. Deneen (R) R+28.2
1920 William B. McKinley (R) R+40.0
1918 Medill McCormick (R) R+5.6
1914 Lawrence Y. Sherman (R) R+1.7