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United States · Election results history · 1980 Senate · Illinois
Election 1980 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.

1980 US Senate election in Illinois

Alan J. Dixon (Democrat) beat David C. O'Neal (Republican) in Illinois in 1980, 56.0% to 42.5%, a margin of 13.5 points and 619,006 votes.

The Democratic hold continued from 1974, when Adlai Stevenson III won.

Republicans led in 52 of the 102 counties as they stood then and Democrats in 50. The largest, Cook, cast 2,042,584 votes and went to the Democrat by 32.0 points. The closest was Jo Daviess, where 6 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
Alan J. Dixon won Democratic 2,565,302 56.0%
David C. O'Neal Republican 1,946,296 42.5%
All other candidates 68,431 1.5%
Total4,580,029

Every county

CountyDemocratRepublicanOthersTotalMargin
Cook 1,330,507 65.1% 676,877 33.1% 35,200 2,042,584 D+32.0
Du Page 118,272 42.0% 159,287 56.5% 4,149 281,708 R+14.6
Lake 76,370 47.3% 82,216 50.9% 2,976 161,562 R+3.6
Will 61,311 51.5% 56,558 47.5% 1,245 119,114 D+4.0
Winnebago 51,969 50.3% 49,675 48.1% 1,641 103,285 D+2.2
Kane 46,094 44.9% 54,998 53.5% 1,669 102,761 R+8.7
Madison 56,034 56.8% 41,751 42.3% 893 98,678 D+14.5
St. Clair 57,615 58.5% 40,176 40.8% 626 98,417 D+17.7
Sangamon 42,718 50.5% 40,780 48.2% 1,146 84,644 D+2.3
Peoria 40,915 49.4% 40,593 49.0% 1,260 82,768 D+0.4
Rock Island 38,372 57.2% 27,915 41.6% 820 67,107 D+15.6
Champaign 31,402 48.9% 30,242 47.1% 2,536 64,180 D+1.8
McHenry 24,409 40.1% 35,407 58.2% 1,052 60,868 R+18.1
Tazewell 24,589 44.0% 30,471 54.6% 787 55,847 R+10.5
Macon 28,614 53.9% 23,942 45.1% 555 53,111 D+8.8
McLean 21,389 43.9% 26,523 54.5% 766 48,678 R+10.5
La Salle 24,344 51.6% 22,308 47.3% 557 47,209 D+4.3
Kankakee 19,087 48.5% 19,821 50.4% 425 39,333 R+1.9
Vermilion 18,761 48.2% 19,763 50.8% 361 38,885 R+2.6
Adams 17,328 55.7% 13,479 43.3% 294 31,101 D+12.4
De Kalb 14,492 48.0% 14,909 49.4% 805 30,206 R+1.4
Knox 12,187 47.2% 13,214 51.1% 439 25,840 R+4.0
Whiteside 11,432 44.7% 13,871 54.2% 277 25,580 R+9.5
Williamson 12,690 53.1% 10,987 46.0% 209 23,886 D+7.1
Henry 11,416 48.0% 12,089 50.8% 290 23,795 R+2.8
Jackson 13,424 57.7% 8,853 38.1% 981 23,258 D+19.7
Macoupin 12,081 55.2% 9,628 44.0% 170 21,879 D+11.2
Coles 9,714 47.1% 10,695 51.9% 215 20,624 R+4.8
Stephenson 9,782 48.9% 9,973 49.8% 257 20,012 R+1.0
Franklin 11,881 62.4% 6,972 36.6% 186 19,039 D+25.8
Fulton 9,310 49.6% 9,244 49.3% 203 18,757 D+0.4
Ogle 7,245 39.1% 11,057 59.7% 205 18,507 R+20.6
Bureau 8,856 48.4% 9,222 50.4% 209 18,287 R+2.0
Marion 9,273 51.2% 8,715 48.1% 132 18,120 D+3.1
Morgan 9,186 54.7% 7,450 44.4% 143 16,779 D+10.3
Livingston 6,638 39.9% 9,904 59.5% 113 16,655 R+19.6
Christian 8,270 52.1% 7,503 47.3% 95 15,868 D+4.8
Jefferson 8,305 52.4% 7,420 46.8% 125 15,850 D+5.6
Randolph 8,022 52.2% 7,252 47.1% 108 15,382 D+5.0
Lee 5,825 38.1% 9,339 61.1% 119 15,283 R+23.0
Montgomery 7,674 50.7% 7,313 48.3% 150 15,137 D+2.4
Woodford 5,434 36.1% 9,434 62.6% 191 15,059 R+26.6
Iroquois 5,819 38.7% 9,126 60.6% 104 15,049 R+22.0
Logan 5,832 40.9% 8,346 58.5% 93 14,271 R+17.6
Kendall 5,333 37.5% 8,707 61.2% 179 14,219 R+23.7
McDonough 6,564 46.2% 7,380 51.9% 267 14,211 R+5.7
Effingham 6,524 47.2% 7,229 52.3% 76 13,829 R+5.1
Clinton 5,975 45.0% 7,212 54.3% 105 13,292 R+9.3
Grundy 5,949 45.6% 6,983 53.6% 103 13,035 R+7.9
Saline 7,352 57.6% 5,312 41.6% 110 12,774 D+16.0
Boone 4,773 41.9% 6,489 57.0% 125 11,387 R+15.1
Shelby 5,148 48.1% 5,478 51.2% 79 10,705 R+3.1
Hancock 5,140 49.5% 5,168 49.7% 84 10,392 R+0.3
Perry 5,496 53.0% 4,809 46.4% 58 10,363 D+6.6
Edgar 4,901 47.3% 5,400 52.1% 61 10,362 R+4.8
Fayette 4,450 45.4% 5,329 54.4% 17 9,796 R+9.0
Monroe 4,471 46.0% 5,184 53.3% 63 9,718 R+7.3
Crawford 4,820 50.7% 4,571 48.1% 107 9,498 D+2.6
Wayne 4,286 46.9% 4,795 52.4% 64 9,145 R+5.6
Pike 5,416 59.4% 3,624 39.7% 77 9,117 D+19.7
Mercer 4,521 50.1% 4,441 49.2% 61 9,023 D+0.9
Warren 3,675 41.6% 5,018 56.8% 141 8,834 R+15.2
White 4,433 50.7% 4,253 48.6% 61 8,747 D+2.1
Jersey 4,688 53.7% 3,968 45.5% 66 8,722 D+8.3
Jo Daviess 4,235 49.2% 4,241 49.3% 134 8,610 R+0.1
Clark 4,235 50.4% 4,103 48.8% 68 8,406 D+1.6
Douglas 3,490 42.6% 4,641 56.7% 53 8,184 R+14.1
Union 4,912 60.1% 3,177 38.9% 86 8,175 D+21.2
Carroll 3,507 44.4% 4,312 54.6% 85 7,904 R+10.2
Piatt 3,481 45.1% 4,163 54.0% 69 7,713 R+8.8
Richland 3,796 49.5% 3,848 50.2% 24 7,668 R+0.7
Lawrence 4,082 53.5% 3,461 45.4% 87 7,630 D+8.1
Washington 2,740 36.0% 4,844 63.7% 24 7,608 R+27.7
Mason 3,649 48.0% 3,891 51.2% 63 7,603 R+3.2
Bond 3,525 48.0% 3,779 51.5% 36 7,340 R+3.5
De Witt 2,914 40.4% 4,223 58.5% 76 7,213 R+18.1
Ford 2,534 35.6% 4,535 63.7% 50 7,119 R+28.1
Clay 3,462 49.2% 3,518 50.0% 53 7,033 R+0.8
Massac 3,688 52.6% 3,276 46.7% 44 7,008 D+5.9
Greene 3,895 55.8% 3,033 43.5% 47 6,975 D+12.4
Marshall 2,714 40.8% 3,856 57.9% 89 6,659 R+17.1
Cass 3,545 53.3% 3,069 46.1% 39 6,653 D+7.2
Moultrie 2,941 48.6% 3,065 50.7% 45 6,051 R+2.0
Wabash 2,929 51.9% 2,659 47.1% 59 5,647 D+4.8
Jasper 2,974 54.2% 2,457 44.8% 52 5,483 D+9.4
Menard 2,273 41.7% 3,137 57.5% 42 5,452 R+15.8
Alexander 3,332 61.2% 2,076 38.1% 38 5,446 D+23.1
Cumberland 2,631 50.9% 2,488 48.1% 49 5,168 D+2.8
Hamilton 2,634 51.5% 2,456 48.1% 21 5,111 D+3.5
Johnson 2,054 45.4% 2,458 54.3% 12 4,524 R+8.9
Schuyler 2,199 50.1% 2,161 49.2% 32 4,392 D+0.9
Henderson 2,070 49.7% 2,046 49.1% 49 4,165 D+0.6
Pulaski 2,079 56.1% 1,615 43.6% 11 3,705 D+12.5
Edwards 1,496 41.5% 2,075 57.6% 30 3,601 R+16.1
Putnam 1,662 49.6% 1,652 49.3% 40 3,354 D+0.3
Stark 1,338 40.4% 1,923 58.1% 48 3,309 R+17.7
Gallatin 2,013 61.2% 1,261 38.3% 16 3,290 D+22.9
Scott 1,564 52.8% 1,374 46.4% 24 2,962 D+6.4
Hardin 1,628 55.1% 1,313 44.5% 11 2,952 D+10.7
Calhoun 1,607 57.6% 1,164 41.7% 19 2,790 D+15.9
Brown 1,520 57.7% 1,104 41.9% 12 2,636 D+15.8
Pope 1,151 48.8% 1,194 50.6% 13 2,358 R+1.8

Counties as they stood in 1980; 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.

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