Illinois — 1984 presidential election
Recent presidential results
Akashicstate1984 presidential electionIllinois · PresidentReaganR+12.9
How it voted
Share of the 1984 vote
| Ronald Reagan ✓Republican | 56.2% | 2,707,103 |
|---|---|---|
| Walter MondaleDemocratic | 43.3% | 2,086,499 |
| OtherAll other candidates | 0.5% | 25,486 |
1984presidential margin
D+60R+60
102 counties, each filled by 1984 D-vs-R margin. Hover any county for its result.
Illinois cast 24 electoral votes this cycle.
County-level results (102 counties) — table
| County | Winner | Margin |
|---|---|---|
| Adams County, IL | Republican | R+32.3 |
| Alexander County, IL | Democratic | D+5.5 |
| Bond County, IL | Republican | R+19.2 |
| Boone County, IL | Republican | R+33.8 |
| Brown County, IL | Republican | R+21.2 |
| Bureau County, IL | Republican | R+25.7 |
| Calhoun County, IL | Republican | R+6.6 |
| Carroll County, IL | Republican | R+37.1 |
| Cass County, IL | Republican | R+7.8 |
| Champaign County, IL | Republican | R+17.9 |
| Christian County, IL | Republican | R+6.1 |
| Clark County, IL | Republican | R+27.3 |
| Clay County, IL | Republican | R+28.7 |
| Clinton County, IL | Republican | R+33.1 |
| Coles County, IL | Republican | R+32.3 |
| Cook County, IL | Democratic | D+2.6 |
| Crawford County, IL | Republican | R+33.2 |
| Cumberland County, IL | Republican | R+26.6 |
| De Witt County, IL | Republican | R+31.6 |
| DeKalb County, IL | Republican | R+29.7 |
| Douglas County, IL | Republican | R+32.6 |
| DuPage County, IL | Republican | R+51.9 |
| Edgar County, IL | Republican | R+35.4 |
| Edwards County, IL | Republican | R+44.8 |
| Effingham County, IL | Republican | R+42.8 |
| Fayette County, IL | Republican | R+26.4 |
| Ford County, IL | Republican | R+46.6 |
| Franklin County, IL | Democratic | D+5.0 |
| Fulton County, IL | Republican | R+0.1 |
| Gallatin County, IL | Democratic | D+5.5 |
| Greene County, IL | Republican | R+22.4 |
| Grundy County, IL | Republican | R+34.4 |
| Hamilton County, IL | Republican | R+15.4 |
| Hancock County, IL | Republican | R+25.4 |
| Hardin County, IL | Republican | R+16.7 |
| Henderson County, IL | Republican | R+7.5 |
| Henry County, IL | Republican | R+15.1 |
| Iroquois County, IL | Republican | R+54.7 |
| Jackson County, IL | Republican | R+5.8 |
| Jasper County, IL | Republican | R+35.3 |
| Jefferson County, IL | Republican | R+14.5 |
| Jersey County, IL | Republican | R+15.5 |
| Jo Daviess County, IL | Republican | R+27.2 |
| Johnson County, IL | Republican | R+35.0 |
| Kane County, IL | Republican | R+38.8 |
| Kankakee County, IL | Republican | R+21.6 |
| Kendall County, IL | Republican | R+48.1 |
| Knox County, IL | Republican | R+10.9 |
| Lake County, IL | Republican | R+37.2 |
| LaSalle County, IL | Republican | R+14.2 |
| Lawrence County, IL | Republican | R+23.1 |
| Lee County, IL | Republican | R+47.9 |
| Livingston County, IL | Republican | R+45.7 |
| Logan County, IL | Republican | R+41.9 |
| Macon County, IL | Republican | R+8.9 |
| Macoupin County, IL | Republican | R+7.3 |
| Madison County, IL | Republican | R+8.2 |
| Marion County, IL | Republican | R+19.5 |
| Marshall County, IL | Republican | R+25.8 |
| Mason County, IL | Republican | R+10.1 |
| Massac County, IL | Republican | R+9.0 |
| McDonough County, IL | Republican | R+34.4 |
| McHenry County, IL | Republican | R+53.0 |
| McLean County, IL | Republican | R+33.8 |
| Menard County, IL | Republican | R+36.4 |
| Mercer County, IL | Republican | R+10.4 |
| Monroe County, IL | Republican | R+36.0 |
| Montgomery County, IL | Republican | R+12.5 |
| Morgan County, IL | Republican | R+33.1 |
| Moultrie County, IL | Republican | R+18.7 |
| Ogle County, IL | Republican | R+47.3 |
| Peoria County, IL | Republican | R+10.6 |
| Perry County, IL | Republican | R+12.1 |
| Piatt County, IL | Republican | R+27.4 |
| Pike County, IL | Republican | R+14.3 |
| Pope County, IL | Republican | R+24.3 |
| Pulaski County, IL | Republican | R+5.4 |
| Putnam County, IL | Republican | R+12.5 |
| Randolph County, IL | Republican | R+19.3 |
| Richland County, IL | Republican | R+44.2 |
| Rock Island County, IL | Democratic | D+6.7 |
| Saline County, IL | Republican | R+8.6 |
| Sangamon County, IL | Republican | R+22.6 |
| Schuyler County, IL | Republican | R+24.2 |
| Scott County, IL | Republican | R+35.2 |
| Shelby County, IL | Republican | R+19.2 |
| St. Clair County, IL | Democratic | D+1.2 |
| Stark County, IL | Republican | R+34.8 |
| Stephenson County, IL | Republican | R+35.6 |
| Tazewell County, IL | Republican | R+18.7 |
| Union County, IL | Republican | R+10.6 |
| Vermilion County, IL | Republican | R+16.2 |
| Wabash County, IL | Republican | R+33.8 |
| Warren County, IL | Republican | R+27.5 |
| Washington County, IL | Republican | R+36.8 |
| Wayne County, IL | Republican | R+41.1 |
| White County, IL | Republican | R+22.7 |
| Whiteside County, IL | Republican | R+19.6 |
| Will County, IL | Republican | R+26.9 |
| Williamson County, IL | Republican | R+12.5 |
| Winnebago County, IL | Republican | R+17.9 |
| Woodford County, IL | Republican | R+41.5 |
Illinois results by county
102 counties. Third-party and independent votes are reported by the county source as one combined figure; every named candidate is listed in the complete result below.
| Led by | |||||
|---|---|---|---|---|---|
| Adams County | Reagan, Ronald+9,889 | 20,22566.0% | 10,33633.7% | 880.3% | 30,649 |
| Alexander County | Mondale, Walter+298 | 2,57447.1% | 2,87252.5% | 210.4% | 5,467 |
| Bond County | Reagan, Ronald+1,370 | 4,24059.5% | 2,87040.2% | 210.3% | 7,131 |
| Boone County | Reagan, Ronald+3,819 | 7,53666.7% | 3,71732.9% | 530.5% | 11,306 |
| Brown County | Reagan, Ronald+519 | 1,47860.4% | 95939.2% | 90.4% | 2,446 |
| Bureau County | Reagan, Ronald+4,816 | 11,74162.6% | 6,92536.9% | 990.5% | 18,765 |
| Calhoun County | Reagan, Ronald+205 | 1,64853.0% | 1,44346.4% | 160.5% | 3,107 |
| Carroll County | Reagan, Ronald+2,839 | 5,23768.4% | 2,39831.3% | 230.3% | 7,658 |
| Cass County | Reagan, Ronald+498 | 3,43553.7% | 2,93745.9% | 270.4% | 6,399 |
| Champaign County | Reagan, Ronald+11,958 | 39,22458.6% | 27,26640.7% | 4350.6% | 66,925 |
| Christian County | Reagan, Ronald+993 | 8,53452.8% | 7,54146.7% | 770.5% | 16,152 |
| Clark County | Reagan, Ronald+2,286 | 5,31863.4% | 3,03236.2% | 320.4% | 8,382 |
| Clay County | Reagan, Ronald+2,038 | 4,56264.2% | 2,52435.5% | 180.3% | 7,104 |
| Clinton County | Reagan, Ronald+4,605 | 9,23366.4% | 4,62833.3% | 380.3% | 13,899 |
| Coles County | Reagan, Ronald+6,888 | 14,04465.9% | 7,15633.6% | 950.4% | 21,295 |
| Cook County | Mondale, Walter+57,083 | 1,055,55848.4% | 1,112,64151.0% | 12,5360.6% | 2,180,735 |
| Crawford County | Reagan, Ronald+3,131 | 6,26166.4% | 3,13033.2% | 330.4% | 9,424 |
| Cumberland County | Reagan, Ronald+1,269 | 3,00263.0% | 1,73336.4% | 270.6% | 4,762 |
| De Witt County | Reagan, Ronald+2,182 | 4,53465.6% | 2,35234.0% | 290.4% | 6,915 |
| DeKalb County | Reagan, Ronald+9,352 | 20,29464.5% | 10,94234.8% | 2290.7% | 31,465 |
| Douglas County | Reagan, Ronald+2,805 | 5,69166.1% | 2,88633.5% | 270.3% | 8,604 |
| DuPage County | Reagan, Ronald+155,711 | 227,14175.7% | 71,43023.8% | 1,6440.5% | 300,215 |
| Edgar County | Reagan, Ronald+3,580 | 6,82167.5% | 3,24132.1% | 370.4% | 10,099 |
| Edwards County | Reagan, Ronald+1,721 | 2,77872.2% | 1,05727.5% | 100.3% | 3,845 |
| Effingham County | Reagan, Ronald+5,776 | 9,61771.2% | 3,84128.4% | 460.3% | 13,504 |
| Fayette County | Reagan, Ronald+2,763 | 6,60763.1% | 3,84436.7% | 220.2% | 10,473 |
| Ford County | Reagan, Ronald+3,108 | 4,87173.1% | 1,76326.5% | 290.4% | 6,663 |
| Franklin County | Mondale, Walter+1,011 | 9,65647.4% | 10,66752.3% | 540.3% | 20,377 |
| Fulton County | Reagan, Ronald+16 | 9,14749.8% | 9,13149.7% | 990.5% | 18,377 |
| Gallatin County | Mondale, Walter+225 | 1,93947.2% | 2,16452.6% | 90.2% | 4,112 |
| Greene County | Reagan, Ronald+1,494 | 4,05761.0% | 2,56338.5% | 350.5% | 6,655 |
| Grundy County | Reagan, Ronald+4,924 | 9,59567.0% | 4,67132.6% | 590.4% | 14,325 |
| Hamilton County | Reagan, Ronald+823 | 3,07457.5% | 2,25142.1% | 210.4% | 5,346 |
| Hancock County | Reagan, Ronald+2,538 | 6,25162.5% | 3,71337.1% | 370.4% | 10,001 |
| Hardin County | Reagan, Ronald+484 | 1,68958.3% | 1,20541.6% | 50.2% | 2,899 |
| Henderson County | Reagan, Ronald+320 | 2,28953.5% | 1,96946.0% | 200.5% | 4,278 |
| Henry County | Reagan, Ronald+3,825 | 14,50457.4% | 10,67942.3% | 790.3% | 25,262 |
| Iroquois County | Reagan, Ronald+8,027 | 11,32777.1% | 3,30022.5% | 580.4% | 14,685 |
| Jackson County | Reagan, Ronald+1,504 | 13,60952.6% | 12,10546.7% | 1820.7% | 25,896 |
| Jasper County | Reagan, Ronald+1,923 | 3,67367.3% | 1,75032.1% | 310.6% | 5,454 |
| Jefferson County | Reagan, Ronald+2,442 | 9,64257.1% | 7,20042.6% | 430.3% | 16,885 |
| Jersey County | Reagan, Ronald+1,384 | 5,14657.6% | 3,76242.1% | 260.3% | 8,934 |
| Jo Daviess County | Reagan, Ronald+2,529 | 5,87763.2% | 3,34836.0% | 770.8% | 9,302 |
| Johnson County | Reagan, Ronald+1,777 | 3,42467.4% | 1,64732.4% | 120.2% | 5,083 |
| Kane County | Reagan, Ronald+40,780 | 72,65569.1% | 31,87530.3% | 6290.6% | 105,159 |
| Kankakee County | Reagan, Ronald+8,561 | 23,80760.0% | 15,24638.4% | 6121.5% | 39,665 |
| Kendall County | Reagan, Ronald+7,083 | 10,87273.8% | 3,78925.7% | 690.5% | 14,730 |
| Knox County | Reagan, Ronald+2,947 | 14,97455.2% | 12,02744.3% | 1210.4% | 27,122 |
| Lake County | Reagan, Ronald+64,454 | 118,40168.4% | 53,94731.1% | 8760.5% | 173,224 |
| LaSalle County | Reagan, Ronald+6,856 | 27,38856.9% | 20,53242.7% | 2190.5% | 48,139 |
| Lawrence County | Reagan, Ronald+1,762 | 4,68661.4% | 2,92438.3% | 280.4% | 7,638 |
| Lee County | Reagan, Ronald+7,259 | 11,17873.8% | 3,91925.9% | 580.4% | 15,155 |
| Livingston County | Reagan, Ronald+7,724 | 12,29172.6% | 4,56727.0% | 610.4% | 16,919 |
| Logan County | Reagan, Ronald+5,880 | 9,93270.7% | 4,05228.8% | 620.4% | 14,046 |
| Macon County | Reagan, Ronald+4,994 | 30,45754.3% | 25,46345.4% | 1920.3% | 56,112 |
| Macoupin County | Reagan, Ronald+1,680 | 12,28253.5% | 10,60246.2% | 690.3% | 22,953 |
| Madison County | Reagan, Ronald+8,669 | 57,02153.9% | 48,35245.7% | 3400.3% | 105,713 |
| Marion County | Reagan, Ronald+3,701 | 11,30059.6% | 7,59940.1% | 460.2% | 18,945 |
| Marshall County | Reagan, Ronald+1,674 | 4,06062.5% | 2,38636.7% | 470.7% | 6,493 |
| Mason County | Reagan, Ronald+755 | 4,10954.9% | 3,35444.8% | 230.3% | 7,486 |
| Massac County | Reagan, Ronald+633 | 3,82754.3% | 3,19445.3% | 280.4% | 7,049 |
| McDonough County | Reagan, Ronald+4,822 | 9,38367.0% | 4,56132.6% | 570.4% | 14,001 |
| McHenry County | Reagan, Ronald+32,862 | 47,28276.2% | 14,42023.2% | 3400.5% | 62,042 |
| McLean County | Reagan, Ronald+16,341 | 32,22166.6% | 15,88032.8% | 2480.5% | 48,349 |
| Menard County | Reagan, Ronald+2,099 | 3,92568.1% | 1,82631.7% | 150.3% | 5,766 |
| Mercer County | Reagan, Ronald+925 | 4,90755.0% | 3,98244.6% | 380.4% | 8,927 |
| Monroe County | Reagan, Ronald+3,680 | 6,93667.9% | 3,25631.9% | 250.2% | 10,217 |
| Montgomery County | Reagan, Ronald+1,831 | 8,19156.1% | 6,36043.5% | 540.4% | 14,605 |
| Morgan County | Reagan, Ronald+5,322 | 10,68366.4% | 5,36133.3% | 530.3% | 16,097 |
| Moultrie County | Reagan, Ronald+1,135 | 3,59359.2% | 2,45840.5% | 210.3% | 6,072 |
| Ogle County | Reagan, Ronald+8,700 | 13,50373.4% | 4,80326.1% | 900.5% | 18,396 |
| Peoria County | Reagan, Ronald+8,777 | 45,60755.0% | 36,83044.4% | 4620.6% | 82,899 |
| Perry County | Reagan, Ronald+1,268 | 5,85255.9% | 4,58443.8% | 360.3% | 10,472 |
| Piatt County | Reagan, Ronald+2,160 | 5,00063.5% | 2,84036.0% | 390.5% | 7,879 |
| Pike County | Reagan, Ronald+1,330 | 5,29557.0% | 3,96542.7% | 250.3% | 9,285 |
| Pope County | Reagan, Ronald+605 | 1,54562.0% | 94037.7% | 70.3% | 2,492 |
| Pulaski County | Reagan, Ronald+199 | 1,92352.5% | 1,72447.1% | 170.5% | 3,664 |
| Putnam County | Reagan, Ronald+425 | 1,91256.0% | 1,48743.6% | 140.4% | 3,413 |
| Randolph County | Reagan, Ronald+3,060 | 9,41559.5% | 6,35540.1% | 590.4% | 15,829 |
| Richland County | Reagan, Ronald+3,483 | 5,66571.9% | 2,18227.7% | 270.3% | 7,874 |
| Rock Island County | Mondale, Walter+5,087 | 35,12146.4% | 40,20853.1% | 3430.5% | 75,672 |
| Saline County | Reagan, Ronald+1,138 | 7,17654.2% | 6,03845.6% | 370.3% | 13,251 |
| Sangamon County | Reagan, Ronald+20,027 | 54,08661.1% | 34,05938.5% | 3780.4% | 88,523 |
| Schuyler County | Reagan, Ronald+982 | 2,51561.9% | 1,53337.7% | 130.3% | 4,061 |
| Scott County | Reagan, Ronald+1,033 | 1,97667.3% | 94332.1% | 160.5% | 2,935 |
| Shelby County | Reagan, Ronald+2,055 | 6,37259.4% | 4,31740.2% | 410.4% | 10,730 |
| St. Clair County | Mondale, Walter+1,248 | 51,04649.0% | 52,29450.2% | 8080.8% | 104,148 |
| Stark County | Reagan, Ronald+1,156 | 2,22867.1% | 1,07232.3% | 180.5% | 3,318 |
| Stephenson County | Reagan, Ronald+7,514 | 14,23767.4% | 6,72331.8% | 1710.8% | 21,131 |
| Tazewell County | Reagan, Ronald+10,687 | 33,78259.1% | 23,09540.4% | 2380.4% | 57,115 |
| Union County | Reagan, Ronald+906 | 4,72155.1% | 3,81544.5% | 280.3% | 8,564 |
| Vermilion County | Reagan, Ronald+6,402 | 22,93257.9% | 16,53041.7% | 1490.4% | 39,611 |
| Wabash County | Reagan, Ronald+1,844 | 3,63966.7% | 1,79532.9% | 190.3% | 5,453 |
| Warren County | Reagan, Ronald+2,528 | 5,84663.6% | 3,31836.1% | 290.3% | 9,193 |
| Washington County | Reagan, Ronald+2,766 | 5,12968.2% | 2,36331.4% | 240.3% | 7,516 |
| Wayne County | Reagan, Ronald+3,677 | 6,29870.4% | 2,62129.3% | 320.4% | 8,951 |
| White County | Reagan, Ronald+2,043 | 5,50061.2% | 3,45738.5% | 260.3% | 8,983 |
| Whiteside County | Reagan, Ronald+5,517 | 16,74359.6% | 11,22640.0% | 1270.5% | 28,096 |
| Will County | Reagan, Ronald+33,491 | 78,68463.3% | 45,19336.3% | 5200.4% | 124,397 |
| Williamson County | Reagan, Ronald+3,316 | 14,93056.1% | 11,61443.6% | 860.3% | 26,630 |
| Winnebago County | Reagan, Ronald+19,574 | 64,20358.7% | 44,62940.8% | 6190.6% | 109,451 |
| Woodford County | Reagan, Ronald+6,333 | 10,75870.4% | 4,42529.0% | 890.6% | 15,272 |
complete certified result
Illinois candidate results
Top three shown first · expand for every reported candidate and write-in category
Source: MIT Election Data + Science Lab — U.S. President 1976–2024 state candidate returns
Nominees: Walter Mondale (D) · Ronald Reagan (R)
Illinois's presidential margins
1892–2024, the 1984 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | +3.1% |
| 1896 | −13.0% |
| 1900 | −8.4% |
| 1904 | −28.3% |
| 1908 | −15.5% |
| 1912 | +13.2% |
| 1916 | −9.2% |
| 1920 | −42.3% |
| 1924 | −35.5% |
| 1928 | −14.7% |
| 1932 | +13.2% |
| 1936 | +18.0% |
| 1940 | +2.4% |
| 1944 | +3.5% |
| 1948 | +0.8% |
| 1952 | −9.9% |
| 1956 | −19.2% |
| 1960 | +0.2% |
| 1964 | +18.9% |
| 1968 | −2.9% |
| 1972 | −18.5% |
| 1976 | −2.0% |
| 1980 | −7.9% |
| 1984 | −12.9% |
| 1988 | −2.1% |
| 1992 | +14.2% |
| 1996 | +17.5% |
| 2000 | +12.0% |
| 2004 | +10.3% |
| 2008 | +25.1% |
| 2012 | +16.8% |
| 2016 | +16.9% |
| 2020 | +16.9% |
| 2024 | +10.9% |
Same ballot, 1984IL
Source. MIT Election Data + Science Lab — 1984 presidential returns · official county-level results. Real returns — nothing estimated.