United States Presidential election7 Nov 2028in 729 days Senate D 97% House D 58% Calendar Track record Research
PollingForecast.com United States
Closest results
United States · Election results history · 1984 Senate · Illinois
Election 1984 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.

1984 US Senate election in Illinois

Paul Simon (Democrat) beat Charles H. Percy (Republican) in Illinois in 1984, 50.1% to 48.2%, a margin of 1.9 points and 89,126 votes.

Illinois changed party: in 1978 it went Republican, for Charles H. Percy.

Republicans led in 63 of the 102 counties as they stood then and Democrats in 39. The largest, Cook, cast 2,164,460 votes and went to the Democrat by 14.7 points. The closest was Moultrie, where 18 votes separated the two parties.

United States
Results
2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920 1919 1918 1917 1916 1915 1914 1913 1912 1911 1910 1909 1908 1907 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891 1890 1889 1888 1887 1886 1885 1884 1883 1882 1881 1880 1879 1878 1877 1876 1875 1874 1873 1872 1871 1870 1869 1868 1867 1866 1865
If only voted How this works
If the polls miss like

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
Paul Simon won Democratic 2,397,165 50.1%
Charles H. Percy Republican 2,308,039 48.2%
All other candidates 82,131 1.7%
Total4,787,335

Every county

CountyDemocratRepublicanOthersTotalMargin
Cook 1,222,716 56.5% 904,806 41.8% 36,938 2,164,460 D+14.7
Du Page 92,044 30.8% 198,901 66.6% 7,532 298,477 R+35.8
Lake 66,369 38.6% 101,250 58.8% 4,451 172,070 R+20.3
Will 54,641 44.2% 66,219 53.5% 2,821 123,681 R+9.4
Winnebago 49,215 45.3% 57,367 52.8% 2,157 108,739 R+7.5
Madison 62,247 59.3% 41,837 39.8% 972 105,056 D+19.4
Kane 39,220 37.4% 62,684 59.7% 3,009 104,913 R+22.4
St. Clair 61,688 60.2% 39,426 38.5% 1,345 102,459 D+21.7
Sangamon 42,730 48.1% 44,877 50.5% 1,236 88,843 R+2.4
Peoria 41,698 50.3% 39,822 48.0% 1,413 82,933 D+2.3
Rock Island 41,470 55.4% 32,524 43.4% 865 74,859 D+12.0
Champaign 30,169 45.5% 35,186 53.0% 1,020 66,375 R+7.6
McHenry 18,968 30.8% 40,846 66.3% 1,806 61,620 R+35.5
Tazewell 27,165 48.0% 28,448 50.2% 1,030 56,643 R+2.3
Macon 29,055 52.0% 26,229 47.0% 566 55,850 D+5.1
McLean 18,605 38.5% 28,930 59.9% 772 48,307 R+21.4
La Salle 24,088 50.1% 23,129 48.1% 838 48,055 D+2.0
Vermilion 17,781 45.1% 21,176 53.8% 436 39,393 R+8.6
Kankakee 17,678 45.3% 20,490 52.5% 830 38,998 R+7.2
De Kalb 12,972 41.5% 17,586 56.2% 732 31,290 R+14.7
Adams 13,152 43.0% 17,119 56.0% 325 30,596 R+13.0
Whiteside 12,753 45.8% 14,646 52.6% 451 27,850 R+6.8
Knox 12,597 46.7% 14,041 52.0% 359 26,997 R+5.3
Williamson 15,501 58.3% 10,954 41.2% 151 26,606 D+17.1
Jackson 15,374 59.6% 10,237 39.7% 197 25,808 D+19.9
Henry 11,474 46.0% 13,194 52.9% 285 24,953 R+6.9
Macoupin 12,950 56.7% 9,713 42.5% 188 22,851 D+14.2
Coles 8,824 41.5% 12,238 57.5% 219 21,281 R+16.0
Stephenson 7,912 37.7% 12,613 60.1% 453 20,978 R+22.4
Franklin 13,060 64.4% 7,101 35.0% 125 20,286 D+29.4
Marion 10,357 54.8% 8,392 44.4% 139 18,888 D+10.4
Bureau 8,129 43.5% 10,365 55.5% 198 18,692 R+12.0
Fulton 9,872 53.6% 8,335 45.3% 201 18,408 D+8.3
Ogle 6,296 34.6% 11,418 62.8% 473 18,187 R+28.2
Jefferson 9,135 54.2% 7,610 45.2% 103 16,848 D+9.1
Livingston 5,694 33.8% 10,909 64.8% 233 16,836 R+31.0
Christian 8,904 55.1% 7,031 43.5% 217 16,152 D+11.6
Morgan 7,171 44.5% 8,814 54.7% 133 16,118 R+10.2
Randolph 9,241 58.1% 6,549 41.2% 124 15,914 D+16.9
Woodford 5,691 37.7% 9,092 60.2% 327 15,110 R+22.5
Lee 5,417 36.0% 9,265 61.5% 385 15,067 R+25.5
Kendall 4,957 33.8% 9,221 62.9% 474 14,652 R+29.1
Iroquois 4,714 32.3% 9,584 65.7% 295 14,593 R+33.4
Montgomery 7,623 52.3% 6,805 46.7% 147 14,575 D+5.6
Grundy 5,908 41.5% 8,004 56.2% 322 14,234 R+14.7
Logan 5,251 37.4% 8,584 61.2% 194 14,029 R+23.8
McDonough 5,486 39.7% 8,183 59.2% 165 13,834 R+19.5
Clinton 7,128 51.8% 6,473 47.0% 157 13,758 D+4.8
Effingham 5,665 42.5% 7,380 55.3% 293 13,338 R+12.9
Saline 8,022 60.2% 5,247 39.4% 63 13,332 D+20.8
Boone 4,270 38.1% 6,709 59.8% 239 11,218 R+21.7
Shelby 5,337 50.2% 5,127 48.2% 174 10,638 D+2.0
Perry 5,922 56.6% 4,446 42.5% 86 10,454 D+14.1
Fayette 5,264 51.2% 4,942 48.1% 77 10,283 D+3.1
Monroe 5,395 52.9% 4,715 46.2% 86 10,196 D+6.7
Edgar 3,676 36.9% 6,170 61.9% 116 9,962 R+25.0
Hancock 4,115 41.8% 5,603 56.9% 125 9,843 R+15.1
Crawford 3,482 37.5% 5,711 61.6% 80 9,273 R+24.0
Jo Daviess 3,532 38.1% 5,556 60.0% 179 9,267 R+21.8
Pike 4,591 49.8% 4,555 49.4% 73 9,219 D+0.4
Warren 3,418 37.4% 5,613 61.4% 110 9,141 R+24.0
Jersey 4,830 54.2% 4,010 45.0% 66 8,906 D+9.2
Mercer 4,184 47.1% 4,600 51.8% 103 8,887 R+4.7
White 4,164 47.1% 4,635 52.4% 39 8,838 R+5.3
Wayne 3,104 35.4% 5,580 63.6% 88 8,772 R+28.2
Union 5,025 58.0% 3,581 41.4% 51 8,657 D+16.7
Douglas 3,532 41.4% 4,914 57.6% 80 8,526 R+16.2
Clark 3,464 41.8% 4,747 57.3% 75 8,286 R+15.5
Piatt 3,415 43.6% 4,290 54.8% 124 7,829 R+11.2
Richland 2,564 33.0% 5,102 65.7% 104 7,770 R+32.7
Carroll 2,831 37.2% 4,684 61.6% 95 7,610 R+24.3
Lawrence 3,093 41.1% 4,374 58.1% 56 7,523 R+17.0
Mason 3,854 51.8% 3,503 47.1% 76 7,433 D+4.7
Washington 3,292 44.5% 4,019 54.3% 85 7,396 R+9.8
Bond 3,807 53.9% 3,192 45.2% 66 7,065 D+8.7
Massac 4,258 60.3% 2,778 39.4% 20 7,056 D+21.0
Clay 2,860 40.8% 4,076 58.1% 74 7,010 R+17.3
De Witt 2,861 41.4% 3,949 57.2% 99 6,909 R+15.7
Greene 3,629 53.7% 3,072 45.4% 61 6,762 D+8.2
Ford 2,254 34.2% 4,215 63.9% 130 6,599 R+29.7
Marshall 2,895 44.9% 3,399 52.7% 154 6,448 R+7.8
Cass 3,295 52.2% 2,966 47.0% 56 6,317 D+5.2
Moultrie 2,985 49.5% 2,967 49.2% 76 6,028 D+0.3
Menard 2,355 41.0% 3,284 57.1% 110 5,749 R+16.2
Alexander 3,559 65.2% 1,871 34.3% 32 5,462 D+30.9
Jasper 2,223 41.0% 3,071 56.7% 122 5,416 R+15.7
Wabash 1,956 36.3% 3,386 62.8% 47 5,389 R+26.5
Hamilton 3,042 57.5% 2,229 42.1% 20 5,291 D+15.4
Johnson 2,367 46.5% 2,691 52.9% 31 5,089 R+6.4
Cumberland 2,004 42.6% 2,616 55.6% 86 4,706 R+13.0
Henderson 1,906 44.5% 2,330 54.4% 51 4,287 R+9.9
Gallatin 2,568 63.0% 1,492 36.6% 17 4,077 D+26.4
Schuyler 1,757 43.7% 2,222 55.3% 40 4,019 R+11.6
Edwards 1,228 32.4% 2,539 67.0% 23 3,790 R+34.6
Pulaski 2,155 58.4% 1,500 40.6% 36 3,691 D+17.7
Putnam 1,663 48.9% 1,689 49.7% 46 3,398 R+0.8
Stark 1,280 39.1% 1,913 58.4% 83 3,276 R+19.3
Calhoun 1,838 59.1% 1,260 40.5% 11 3,109 D+18.6
Hardin 1,668 56.7% 1,248 42.4% 25 2,941 D+14.3
Scott 1,239 42.3% 1,672 57.0% 21 2,932 R+14.8
Pope 1,365 54.6% 1,116 44.7% 17 2,498 D+10.0
Brown 1,155 47.3% 1,260 51.6% 25 2,440 R+4.3

Counties as they stood in 1984; 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