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United States · Election results history · 1920 Senate · Illinois
Election 1920 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.

1920 US Senate election in Illinois

William B. McKinley (Republican) beat Peter A. Waller (Democrat) in Illinois in 1920, 66.8% to 26.8%, a margin of 40.0 points and 827,010 votes.

The Republican hold continued from 1914, when Lawrence Y. Sherman won.

Republicans led in 99 of the 102 counties as they stood then and Democrats in 3. The largest, Cook, cast 871,364 votes and went to the Republican by 45.4 points. The closest was Greene, where 145 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
William B. McKinley won Republican 1,381,382 66.8%
Peter A. Waller Democratic 554,372 26.8%
All other candidates 131,289 6.4%
Total2,067,043

Every county

CountyDemocratRepublicanOthersTotalMargin
Cook 210,911 24.2% 606,824 69.6% 53,629 871,364 R+45.4
St. Clair 13,460 32.2% 21,547 51.5% 6,829 41,836 R+19.3
Peoria 9,795 26.6% 23,865 64.9% 3,108 36,768 R+38.3
Sangamon 10,988 30.1% 21,503 58.8% 4,062 36,553 R+28.8
Madison 9,951 30.1% 19,142 57.8% 4,000 33,093 R+27.8
Kane 4,573 14.2% 26,524 82.3% 1,139 32,236 R+68.1
La Salle 6,920 21.6% 23,179 72.2% 2,003 32,102 R+50.6
Rock Island 5,897 19.3% 21,318 69.7% 3,364 30,579 R+50.4
Vermilion 8,597 29.5% 17,948 61.6% 2,572 29,117 R+32.1
Will 5,732 20.3% 21,158 75.1% 1,291 28,181 R+54.7
McLean 6,479 25.4% 16,668 65.3% 2,391 25,538 R+39.9
Winnebago 4,163 16.6% 19,183 76.3% 1,787 25,133 R+59.8
Macon 8,144 32.5% 16,140 64.3% 811 25,095 R+31.9
Adams 7,939 35.4% 12,022 53.6% 2,456 22,417 R+18.2
Champaign 5,545 25.8% 15,219 70.8% 736 21,500 R+45.0
Macoupin 5,830 30.4% 8,693 45.3% 4,673 19,196 R+14.9
Lake 2,365 12.6% 15,507 82.3% 966 18,838 R+69.8
Williamson 4,688 26.4% 10,083 56.9% 2,964 17,735 R+30.4
Knox 3,234 19.1% 12,096 71.5% 1,597 16,927 R+52.4
Kankakee 2,995 18.6% 12,635 78.4% 486 16,116 R+59.8
Fulton 5,386 33.6% 9,385 58.6% 1,243 16,014 R+25.0
Henry 3,507 22.4% 11,467 73.2% 697 15,671 R+50.8
Franklin 4,882 32.9% 7,581 51.0% 2,396 14,859 R+18.2
Du Page 2,063 13.9% 12,180 82.2% 568 14,811 R+68.3
Coles 5,833 40.1% 8,539 58.7% 165 14,537 R+18.6
Christian 5,373 37.8% 7,561 53.2% 1,287 14,221 R+15.4
Montgomery 4,656 33.5% 7,411 53.4% 1,812 13,879 R+19.9
Livingston 3,168 22.8% 10,321 74.4% 378 13,867 R+51.6
Bureau 2,788 20.8% 9,658 72.2% 933 13,379 R+51.3
Whiteside 1,964 14.7% 10,921 81.6% 494 13,379 R+66.9
Jackson 4,422 33.6% 7,991 60.7% 758 13,171 R+27.1
Morgan 4,570 35.5% 7,987 62.0% 318 12,875 R+26.5
Hancock 5,249 41.1% 7,274 57.0% 241 12,764 R+15.9
Stephenson 2,909 22.8% 9,400 73.7% 443 12,752 R+50.9
Marion 4,243 33.6% 6,561 52.0% 1,819 12,623 R+18.4
Saline 3,394 27.0% 6,639 52.9% 2,519 12,552 R+25.9
Edgar 5,587 44.6% 6,714 53.6% 217 12,518 R+9.0
De Kalb 1,748 14.3% 10,250 83.7% 248 12,246 R+69.4
Tazewell 3,611 29.5% 7,694 62.9% 927 12,232 R+33.4
Iroquois 2,513 21.2% 9,137 77.2% 184 11,834 R+56.0
Shelby 5,062 43.0% 6,437 54.7% 276 11,775 R+11.7
McHenry 1,560 13.5% 9,839 84.9% 186 11,585 R+71.5
McDonough 3,906 34.3% 7,221 63.4% 259 11,386 R+29.1
Ogle 1,694 15.2% 9,310 83.4% 157 11,161 R+68.2
Logan 3,297 30.7% 6,936 64.5% 515 10,748 R+33.9
Jefferson 4,770 44.8% 5,709 53.6% 164 10,643 R+8.8
Pike 4,327 42.0% 5,572 54.1% 396 10,295 R+12.1
Randolph 3,220 32.6% 6,162 62.3% 508 9,890 R+29.7
Fayette 3,834 39.0% 5,739 58.4% 250 9,823 R+19.4
Lee 1,759 18.2% 7,651 79.0% 274 9,684 R+60.8
Clark 4,180 43.6% 5,313 55.4% 101 9,594 R+11.8
Crawford 4,083 43.5% 5,171 55.0% 142 9,396 R+11.6
Warren 2,308 25.7% 6,182 68.8% 499 8,989 R+43.1
White 4,142 47.2% 4,501 51.3% 129 8,772 R+4.1
Lawrence 3,712 42.6% 4,725 54.2% 278 8,715 R+11.6
Alexander 3,143 37.3% 5,206 61.8% 73 8,422 R+24.5
De Witt 3,449 41.3% 4,754 56.9% 145 8,348 R+15.6
Wayne 3,139 38.8% 4,900 60.5% 57 8,096 R+21.8
Jo Daviess 1,719 21.4% 6,068 75.4% 256 8,043 R+54.1
Perry 2,460 31.4% 4,589 58.5% 790 7,839 R+27.2
Greene 3,776 49.6% 3,631 47.7% 213 7,620 D+1.9
Douglas 2,312 31.1% 4,845 65.1% 284 7,441 R+34.0
Mercer 1,703 23.0% 5,405 73.0% 298 7,406 R+50.0
Cass 2,847 39.1% 3,955 54.3% 482 7,284 R+15.2
Effingham 3,063 42.6% 4,028 56.0% 103 7,194 R+13.4
Clinton 2,064 28.7% 4,249 59.1% 880 7,193 R+30.4
Woodford 1,968 27.8% 4,910 69.3% 211 7,089 R+41.5
Union 3,655 53.6% 3,099 45.5% 62 6,816 D+8.2
Mason 2,554 39.3% 3,815 58.6% 138 6,507 R+19.4
Washington 1,083 17.0% 4,495 70.5% 802 6,380 R+53.5
Jasper 2,994 47.2% 3,261 51.4% 94 6,349 R+4.2
Pulaski 2,267 35.8% 3,981 62.9% 84 6,332 R+27.1
Piatt 1,881 30.0% 4,310 68.7% 84 6,275 R+38.7
Clay 2,365 38.5% 3,679 59.8% 104 6,148 R+21.4
Boone 534 8.7% 5,436 88.9% 142 6,112 R+80.2
Ford 1,039 17.1% 4,935 81.2% 105 6,079 R+64.1
Carroll 609 10.2% 5,156 86.6% 190 5,955 R+76.4
Hamilton 2,586 44.0% 3,219 54.8% 71 5,876 R+10.8
Moultrie 2,477 42.3% 3,308 56.5% 72 5,857 R+14.2
Grundy 807 14.0% 4,615 80.2% 329 5,751 R+66.2
Bond 1,516 26.8% 3,733 66.0% 403 5,652 R+39.2
Marshall 1,647 29.9% 3,649 66.3% 205 5,501 R+36.4
Wabash 2,516 45.9% 2,870 52.4% 94 5,480 R+6.5
Cumberland 2,172 40.9% 3,083 58.1% 55 5,310 R+17.2
Richland 2,187 41.2% 3,024 57.0% 98 5,309 R+15.8
Schuyler 2,277 43.9% 2,773 53.5% 132 5,182 R+9.6
Jersey 1,991 40.2% 2,881 58.2% 82 4,954 R+18.0
Menard 1,860 38.5% 2,861 59.2% 109 4,830 R+20.7
Massac 684 15.3% 3,705 82.9% 80 4,469 R+67.6
Gallatin 1,994 45.7% 2,183 50.0% 188 4,365 R+4.3
Monroe 935 22.3% 2,934 69.8% 333 4,202 R+47.6
Johnson 1,138 27.2% 2,966 70.9% 81 4,185 R+43.7
Scott 1,843 45.3% 2,134 52.4% 95 4,072 R+7.1
Kendall 434 11.1% 3,443 87.9% 41 3,918 R+76.8
Edwards 747 19.7% 2,996 79.0% 48 3,791 R+59.3
Henderson 743 20.9% 2,733 76.9% 80 3,556 R+56.0
Brown 1,879 52.9% 1,581 44.5% 94 3,554 D+8.4
Stark 662 19.2% 2,747 79.7% 37 3,446 R+60.5
Pope 675 21.2% 2,472 77.6% 38 3,185 R+56.4
Hardin 945 37.4% 1,550 61.4% 29 2,524 R+24.0
Putnam 380 17.4% 1,588 72.7% 217 2,185 R+55.3
Calhoun 727 36.4% 1,234 61.8% 36 1,997 R+25.4

Counties as they stood in 1920; 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