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United States · Election results history · 2020 Senate · Illinois
Election 2020 Results

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2020 US Senate election in Illinois

Richard J Durbin (Democrat) beat Mark C Curran Jr (Republican) in Illinois in 2020, 54.7% to 38.7%, a margin of 16.0 points and 959,060 votes.

The Democratic hold continued from 2014, when Dick Durbin won.

Republicans led in 88 of the 102 counties and Democrats in 14. The largest, Cook, cast 2,290,464 votes and went to the Democrat by 47.0 points. The closest was Alexander, where 66 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
Richard J Durbin won Democratic 3,278,930 54.7%
Mark C Curran Jr Republican 2,319,870 38.7%
All other candidates 391,594 6.5%
Total5,990,394

Every county

CountyDemocratRepublicanOthersTotalMargin
Cook 1,574,685 68.7% 499,034 21.8% 216,745 2,290,464 D+47.0
DuPage 264,921 54.0% 196,759 40.1% 29,264 490,944 D+13.9
Will 175,089 51.2% 144,816 42.4% 21,953 341,858 D+8.9
Lake 187,630 56.4% 131,344 39.5% 13,498 332,472 D+16.9
Kane 122,627 53.3% 96,270 41.9% 11,115 230,012 D+11.5
McHenry 73,803 45.3% 80,440 49.4% 8,603 162,846 R+4.1
Madison 59,178 43.7% 71,658 52.9% 4,652 135,488 R+9.2
St. Clair 66,801 51.8% 55,898 43.3% 6,251 128,950 D+8.5
Winnebago 61,182 47.9% 60,473 47.4% 5,970 127,625 D+0.6
Sangamon 48,733 46.7% 52,333 50.2% 3,255 104,321 R+3.5
Champaign 55,220 58.2% 35,276 37.2% 4,331 94,827 D+21.0
McLean 41,549 47.6% 41,007 47.0% 4,759 87,315 D+0.6
Peoria 42,891 51.3% 37,345 44.7% 3,397 83,633 D+6.6
Tazewell 25,380 37.1% 40,429 59.0% 2,669 68,478 R+22.0
Rock Island 36,493 54.2% 27,705 41.2% 3,107 67,305 D+13.1
Kendall 31,055 49.0% 28,790 45.4% 3,501 63,346 D+3.6
LaSalle 22,851 43.2% 27,437 51.9% 2,562 52,850 R+8.7
Kankakee 19,754 39.3% 26,505 52.7% 4,021 50,280 R+13.4
Macon 20,127 41.1% 27,072 55.3% 1,782 48,981 R+14.2
DeKalb 23,423 49.3% 21,198 44.6% 2,855 47,476 D+4.7
Adams 8,835 26.6% 23,625 71.0% 804 33,264 R+44.5
Williamson 11,473 34.6% 20,679 62.4% 964 33,116 R+27.8
Vermilion 11,375 36.3% 18,751 59.8% 1,208 31,334 R+23.5
Whiteside 12,502 46.3% 13,502 50.0% 1,012 27,016 R+3.7
Grundy 9,766 36.3% 15,005 55.8% 2,114 26,885 R+19.5
Ogle 9,492 36.4% 15,520 59.6% 1,042 26,054 R+23.1
Henry 10,004 39.6% 14,555 57.6% 717 25,276 R+18.0
Boone 10,090 40.9% 13,579 55.0% 1,015 24,684 R+14.1
Macoupin 8,334 35.2% 14,555 61.5% 792 23,681 R+26.3
Knox 10,820 47.0% 11,349 49.3% 863 23,032 R+2.3
Jackson 11,338 49.5% 10,291 45.0% 1,261 22,890 D+4.6
Coles 8,138 36.4% 13,379 59.9% 827 22,344 R+23.5
Stephenson 9,043 41.5% 11,954 54.8% 810 21,807 R+13.3
Woodford 6,276 29.7% 14,174 67.1% 687 21,137 R+37.4
Monroe 6,717 32.0% 13,805 65.7% 497 21,019 R+33.7
Clinton 5,329 28.0% 13,162 69.3% 510 19,001 R+41.2
Effingham 4,128 21.9% 14,272 75.9% 413 18,813 R+53.9
Franklin 5,810 30.9% 12,118 64.5% 852 18,780 R+33.6
Marion 5,122 29.1% 11,718 66.6% 752 17,592 R+37.5
Bureau 7,079 41.0% 9,487 55.0% 693 17,259 R+14.0
Jefferson 5,099 30.0% 11,399 67.1% 485 16,983 R+37.1
Livingston 4,969 29.3% 11,258 66.4% 716 16,943 R+37.1
Fulton 7,109 42.3% 8,799 52.3% 901 16,809 R+10.1
Lee 6,446 39.0% 9,188 55.5% 913 16,547 R+16.6
Christian 4,874 30.5% 10,515 65.8% 598 15,987 R+35.3
Morgan 5,548 36.0% 9,213 59.7% 668 15,429 R+23.8
Randolph 4,645 30.9% 9,741 64.9% 629 15,015 R+33.9
Iroquois 3,075 21.8% 10,249 72.6% 792 14,116 R+50.8
Montgomery 4,293 31.9% 8,738 65.0% 408 13,439 R+33.1
Logan 4,366 33.2% 8,351 63.5% 442 13,159 R+30.3
McDonough 5,090 41.0% 6,674 53.8% 645 12,409 R+12.8
Jo Daviess 5,061 41.2% 6,856 55.9% 356 12,273 R+14.6
Shelby 2,921 24.4% 8,698 72.8% 331 11,950 R+48.3
Jersey 3,478 29.9% 7,850 67.4% 321 11,649 R+37.5
Saline 3,246 29.1% 7,267 65.1% 651 11,164 R+36.0
Perry 3,268 32.2% 6,417 63.3% 458 10,143 R+31.0
Fayette 2,113 21.3% 7,589 76.4% 233 9,935 R+55.1
Piatt 3,407 34.3% 6,004 60.5% 521 9,932 R+26.1
Crawford 2,384 25.1% 6,684 70.4% 429 9,497 R+45.3
Hancock 2,516 27.3% 6,484 70.2% 232 9,232 R+43.0
Union 3,102 35.2% 5,465 62.1% 234 8,801 R+26.8
Mercer 3,420 39.1% 5,068 58.0% 256 8,744 R+18.8
Douglas 2,494 28.8% 5,864 67.8% 288 8,646 R+39.0
Wayne 1,401 16.9% 6,708 80.7% 200 8,309 R+63.9
Clark 2,082 25.2% 5,939 72.0% 229 8,250 R+46.8
Richland 1,932 23.8% 5,777 71.0% 422 8,131 R+47.3
Edgar 2,247 27.9% 5,568 69.0% 249 8,064 R+41.2
Bond 2,714 33.7% 5,061 62.8% 279 8,054 R+29.1
Warren 3,049 38.2% 4,552 57.0% 389 7,990 R+18.8
Washington 1,914 24.0% 5,671 71.2% 382 7,967 R+47.2
Carroll 2,835 35.8% 4,840 61.1% 243 7,918 R+25.3
De Witt 2,451 31.0% 5,140 65.0% 317 7,908 R+34.0
Pike 1,837 23.5% 5,785 74.0% 194 7,816 R+50.5
White 1,686 22.6% 5,400 72.3% 384 7,470 R+49.7
Ford 1,765 25.2% 4,872 69.6% 365 7,002 R+44.4
Massac 1,857 27.1% 4,712 68.8% 283 6,852 R+41.7
Menard 2,095 30.6% 4,606 67.3% 144 6,845 R+36.7
Clay 1,295 19.3% 5,254 78.4% 153 6,702 R+59.1
Moultrie 1,816 27.2% 4,650 69.6% 219 6,685 R+42.4
Mason 2,387 35.8% 4,075 61.1% 205 6,667 R+25.3
Johnson 1,559 24.0% 4,626 71.2% 313 6,498 R+47.2
Greene 1,702 27.0% 4,169 66.2% 426 6,297 R+39.2
Lawrence 1,571 25.1% 4,500 72.0% 180 6,251 R+46.9
Marshall 2,027 32.8% 3,957 63.9% 205 6,189 R+31.2
Cumberland 1,357 23.1% 4,248 72.3% 271 5,876 R+49.2
Jasper 1,180 21.0% 4,157 73.9% 286 5,623 R+52.9
Wabash 1,276 23.3% 4,078 74.3% 133 5,487 R+51.1
Cass 1,862 34.8% 3,260 60.9% 230 5,352 R+26.1
Hamilton 1,112 26.7% 2,931 70.5% 115 4,158 R+43.7
Schuyler 1,283 32.5% 2,448 62.1% 212 3,943 R+29.5
Henderson 1,299 36.4% 2,178 61.1% 89 3,566 R+24.6
Putnam 1,459 44.2% 1,706 51.7% 133 3,298 R+7.5
Edwards 556 17.0% 2,658 81.2% 58 3,272 R+64.2
Stark 843 29.8% 1,894 67.0% 90 2,827 R+37.2
Scott 705 25.6% 1,930 70.0% 122 2,757 R+44.4
Calhoun 930 34.5% 1,697 63.0% 65 2,692 R+28.5
Pulaski 1,066 41.4% 1,466 56.9% 44 2,576 R+15.5
Alexander 1,218 47.8% 1,284 50.4% 48 2,550 R+2.6
Gallatin 829 32.7% 1,642 64.7% 68 2,539 R+32.0
Brown 635 25.5% 1,787 71.8% 66 2,488 R+46.3
Pope 520 23.7% 1,573 71.7% 101 2,194 R+48.0
Hardin 591 28.5% 1,431 69.0% 52 2,074 R+40.5

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