Iowa — 1984 presidential election
Recent presidential results
Akashicstate1984 presidential electionIowa · PresidentReaganR+7.4
How it voted
Share of the 1984 vote
| Ronald Reagan ✓Republican | 53.3% | 703,088 |
|---|---|---|
| Walter MondaleDemocratic | 45.9% | 605,620 |
| OtherAll other candidates | 0.8% | 11,097 |
1984presidential margin
D+60R+60
99 counties, each filled by 1984 D-vs-R margin. Hover any county for its result.
Iowa cast 8 electoral votes this cycle.
County-level results (99 counties) — table
| County | Winner | Margin |
|---|---|---|
| Adair County, IA | Republican | R+13.8 |
| Adams County, IA | Republican | R+16.4 |
| Allamakee County, IA | Republican | R+27.0 |
| Appanoose County, IA | Republican | R+1.8 |
| Audubon County, IA | Republican | R+10.8 |
| Benton County, IA | Republican | R+5.4 |
| Black Hawk County, IA | Republican | R+1.2 |
| Boone County, IA | Democratic | D+6.0 |
| Bremer County, IA | Republican | R+25.4 |
| Buchanan County, IA | Republican | R+9.1 |
| Buena Vista County, IA | Republican | R+11.5 |
| Butler County, IA | Republican | R+32.5 |
| Calhoun County, IA | Republican | R+13.1 |
| Carroll County, IA | Republican | R+0.6 |
| Cass County, IA | Republican | R+35.0 |
| Cedar County, IA | Republican | R+19.8 |
| Cerro Gordo County, IA | Democratic | D+1.6 |
| Cherokee County, IA | Republican | R+9.3 |
| Chickasaw County, IA | Republican | R+6.9 |
| Clarke County, IA | Republican | R+5.4 |
| Clay County, IA | Republican | R+8.1 |
| Clayton County, IA | Republican | R+18.5 |
| Clinton County, IA | Republican | R+10.5 |
| Crawford County, IA | Republican | R+14.4 |
| Dallas County, IA | Democratic | D+3.8 |
| Davis County, IA | Democratic | D+5.5 |
| Decatur County, IA | Republican | R+0.1 |
| Delaware County, IA | Republican | R+20.1 |
| Des Moines County, IA | Democratic | D+7.7 |
| Dickinson County, IA | Republican | R+14.5 |
| Dubuque County, IA | Democratic | D+6.4 |
| Emmet County, IA | Republican | R+3.5 |
| Fayette County, IA | Republican | R+16.2 |
| Floyd County, IA | Republican | R+2.2 |
| Franklin County, IA | Republican | R+14.1 |
| Fremont County, IA | Republican | R+30.4 |
| Greene County, IA | Democratic | D+4.5 |
| Grundy County, IA | Republican | R+40.1 |
| Guthrie County, IA | Republican | R+5.0 |
| Hamilton County, IA | Republican | R+12.3 |
| Hancock County, IA | Republican | R+13.9 |
| Hardin County, IA | Republican | R+7.4 |
| Harrison County, IA | Republican | R+27.0 |
| Henry County, IA | Republican | R+14.3 |
| Howard County, IA | Republican | R+11.9 |
| Humboldt County, IA | Republican | R+16.9 |
| Ida County, IA | Republican | R+25.2 |
| Iowa County, IA | Republican | R+21.2 |
| Jackson County, IA | Republican | R+4.4 |
| Jasper County, IA | Republican | R+3.3 |
| Jefferson County, IA | Republican | R+22.9 |
| Johnson County, IA | Democratic | D+16.3 |
| Jones County, IA | Republican | R+12.3 |
| Keokuk County, IA | Republican | R+4.7 |
| Kossuth County, IA | Republican | R+0.3 |
| Lee County, IA | Democratic | D+0.9 |
| Linn County, IA | Republican | R+3.2 |
| Louisa County, IA | Republican | R+15.2 |
| Lucas County, IA | Republican | R+4.1 |
| Lyon County, IA | Republican | R+49.2 |
| Madison County, IA | Republican | R+1.6 |
| Mahaska County, IA | Republican | R+19.2 |
| Marion County, IA | Republican | R+6.9 |
| Marshall County, IA | Republican | R+10.2 |
| Mills County, IA | Republican | R+46.7 |
| Mitchell County, IA | Republican | R+10.7 |
| Monona County, IA | Republican | R+11.8 |
| Monroe County, IA | Democratic | D+9.7 |
| Montgomery County, IA | Republican | R+43.2 |
| Muscatine County, IA | Republican | R+20.3 |
| O'Brien County, IA | Republican | R+33.4 |
| Osceola County, IA | Republican | R+32.9 |
| Page County, IA | Republican | R+50.6 |
| Palo Alto County, IA | Democratic | D+5.2 |
| Plymouth County, IA | Republican | R+30.1 |
| Pocahontas County, IA | Republican | R+2.8 |
| Polk County, IA | Democratic | D+2.7 |
| Pottawattamie County, IA | Republican | R+27.0 |
| Poweshiek County, IA | Republican | R+6.9 |
| Ringgold County, IA | Democratic | D+2.6 |
| Sac County, IA | Republican | R+16.3 |
| Scott County, IA | Republican | R+7.7 |
| Shelby County, IA | Republican | R+29.2 |
| Sioux County, IA | Republican | R+63.5 |
| Story County, IA | Republican | R+4.0 |
| Tama County, IA | Republican | R+9.1 |
| Taylor County, IA | Republican | R+24.8 |
| Union County, IA | Republican | R+10.8 |
| Van Buren County, IA | Republican | R+14.1 |
| Wapello County, IA | Democratic | D+19.4 |
| Warren County, IA | Republican | R+0.6 |
| Washington County, IA | Republican | R+19.7 |
| Wayne County, IA | Republican | R+3.3 |
| Webster County, IA | Democratic | D+1.6 |
| Winnebago County, IA | Republican | R+15.0 |
| Winneshiek County, IA | Republican | R+17.1 |
| Woodbury County, IA | Republican | R+9.6 |
| Worth County, IA | Democratic | D+6.5 |
| Wright County, IA | Republican | R+10.4 |
Iowa results by county
99 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 | |||||
|---|---|---|---|---|---|
| Adair County | Reagan, Ronald+636 | 2,61556.6% | 1,97942.8% | 250.5% | 4,619 |
| Adams County | Reagan, Ronald+485 | 1,70657.6% | 1,22141.3% | 331.1% | 2,960 |
| Allamakee County | Reagan, Ronald+1,715 | 3,99762.9% | 2,28235.9% | 751.2% | 6,354 |
| Appanoose County | Reagan, Ronald+123 | 3,41250.5% | 3,28948.7% | 580.9% | 6,759 |
| Audubon County | Reagan, Ronald+452 | 2,30655.0% | 1,85444.2% | 350.8% | 4,195 |
| Benton County | Reagan, Ronald+573 | 5,56652.1% | 4,99346.8% | 1191.1% | 10,678 |
| Black Hawk County | Reagan, Ronald+795 | 32,26250.2% | 31,46749.0% | 5040.8% | 64,233 |
| Boone County | Mondale, Walter+739 | 5,74646.8% | 6,48552.8% | 460.4% | 12,277 |
| Bremer County | Reagan, Ronald+2,811 | 6,89562.4% | 4,08436.9% | 760.7% | 11,055 |
| Buchanan County | Reagan, Ronald+836 | 4,96554.3% | 4,12945.1% | 580.6% | 9,152 |
| Buena Vista County | Reagan, Ronald+1,084 | 5,19355.2% | 4,10943.7% | 1031.1% | 9,405 |
| Butler County | Reagan, Ronald+2,247 | 4,57066.0% | 2,32333.5% | 310.4% | 6,924 |
| Calhoun County | Reagan, Ronald+770 | 3,31156.1% | 2,54143.1% | 460.8% | 5,898 |
| Carroll County | Reagan, Ronald+61 | 5,02149.8% | 4,96049.2% | 961.0% | 10,077 |
| Cass County | Reagan, Ronald+2,636 | 5,05367.1% | 2,41732.1% | 610.8% | 7,531 |
| Cedar County | Reagan, Ronald+1,531 | 4,61759.6% | 3,08639.8% | 450.6% | 7,748 |
| Cerro Gordo County | Mondale, Walter+356 | 11,21448.9% | 11,57050.4% | 1660.7% | 22,950 |
| Cherokee County | Reagan, Ronald+697 | 4,04654.2% | 3,34944.8% | 751.0% | 7,470 |
| Chickasaw County | Reagan, Ronald+475 | 3,66152.9% | 3,18646.1% | 701.0% | 6,917 |
| Clarke County | Reagan, Ronald+232 | 2,26252.3% | 2,03047.0% | 290.7% | 4,321 |
| Clay County | Reagan, Ronald+676 | 4,45053.5% | 3,77445.4% | 921.1% | 8,316 |
| Clayton County | Reagan, Ronald+1,583 | 5,02958.8% | 3,44640.3% | 780.9% | 8,553 |
| Clinton County | Reagan, Ronald+2,674 | 13,91454.8% | 11,24044.2% | 2501.0% | 25,404 |
| Crawford County | Reagan, Ronald+1,156 | 4,55256.5% | 3,39642.2% | 1051.3% | 8,053 |
| Dallas County | Mondale, Walter+484 | 6,08047.8% | 6,56451.7% | 630.5% | 12,707 |
| Davis County | Mondale, Walter+231 | 1,95646.8% | 2,18752.3% | 390.9% | 4,182 |
| Decatur County | Reagan, Ronald+6 | 2,10449.6% | 2,09849.5% | 400.9% | 4,242 |
| Delaware County | Reagan, Ronald+1,611 | 4,76959.6% | 3,15839.5% | 740.9% | 8,001 |
| Des Moines County | Mondale, Walter+1,614 | 9,55945.8% | 11,17353.6% | 1180.6% | 20,850 |
| Dickinson County | Reagan, Ronald+1,039 | 4,06456.7% | 3,02542.2% | 811.1% | 7,170 |
| Dubuque County | Mondale, Walter+2,637 | 19,23946.4% | 21,87652.7% | 3760.9% | 41,491 |
| Emmet County | Reagan, Ronald+200 | 2,94651.5% | 2,74648.0% | 330.6% | 5,725 |
| Fayette County | Reagan, Ronald+1,828 | 6,50557.6% | 4,67741.4% | 1201.1% | 11,302 |
| Floyd County | Reagan, Ronald+187 | 4,34150.8% | 4,15448.6% | 580.7% | 8,553 |
| Franklin County | Reagan, Ronald+780 | 3,12956.4% | 2,34942.4% | 671.2% | 5,545 |
| Fremont County | Reagan, Ronald+1,260 | 2,68664.8% | 1,42634.4% | 350.8% | 4,147 |
| Greene County | Mondale, Walter+252 | 2,57946.4% | 2,83151.0% | 1442.6% | 5,554 |
| Grundy County | Reagan, Ronald+2,612 | 4,52769.5% | 1,91529.4% | 761.2% | 6,518 |
| Guthrie County | Reagan, Ronald+266 | 2,78351.9% | 2,51746.9% | 631.2% | 5,363 |
| Hamilton County | Reagan, Ronald+949 | 4,27955.6% | 3,33043.3% | 861.1% | 7,695 |
| Hancock County | Reagan, Ronald+823 | 3,36256.6% | 2,53942.8% | 370.6% | 5,938 |
| Hardin County | Reagan, Ronald+718 | 5,19553.4% | 4,47746.0% | 600.6% | 9,732 |
| Harrison County | Reagan, Ronald+1,857 | 4,35263.2% | 2,49536.3% | 350.5% | 6,882 |
| Henry County | Reagan, Ronald+1,139 | 4,51656.8% | 3,37742.5% | 620.8% | 7,955 |
| Howard County | Reagan, Ronald+583 | 2,71855.5% | 2,13543.6% | 450.9% | 4,898 |
| Humboldt County | Reagan, Ronald+990 | 3,39657.9% | 2,40641.0% | 611.0% | 5,863 |
| Ida County | Reagan, Ronald+1,059 | 2,61862.3% | 1,55937.1% | 250.6% | 4,202 |
| Iowa County | Reagan, Ronald+1,537 | 4,35260.0% | 2,81538.8% | 841.2% | 7,251 |
| Jackson County | Reagan, Ronald+411 | 4,81151.5% | 4,40047.1% | 1291.4% | 9,340 |
| Jasper County | Reagan, Ronald+553 | 8,57651.4% | 8,02348.0% | 1000.6% | 16,699 |
| Jefferson County | Reagan, Ronald+1,766 | 4,72761.2% | 2,96138.3% | 370.5% | 7,725 |
| Johnson County | Mondale, Walter+7,323 | 18,67741.5% | 26,00057.7% | 3670.8% | 45,044 |
| Jones County | Reagan, Ronald+1,082 | 4,90755.8% | 3,82543.5% | 590.7% | 8,791 |
| Keokuk County | Reagan, Ronald+264 | 2,91351.5% | 2,64946.8% | 941.7% | 5,656 |
| Kossuth County | Reagan, Ronald+34 | 4,87249.6% | 4,83849.3% | 1041.1% | 9,814 |
| Lee County | Mondale, Walter+156 | 8,75649.2% | 8,91250.0% | 1410.8% | 17,809 |
| Linn County | Reagan, Ronald+2,533 | 41,06151.1% | 38,52848.0% | 7260.9% | 80,315 |
| Louisa County | Reagan, Ronald+696 | 2,62357.4% | 1,92742.1% | 230.5% | 4,573 |
| Lucas County | Reagan, Ronald+208 | 2,63051.7% | 2,42247.6% | 330.6% | 5,085 |
| Lyon County | Reagan, Ronald+2,777 | 4,17874.1% | 1,40124.8% | 631.1% | 5,642 |
| Madison County | Reagan, Ronald+101 | 3,16850.6% | 3,06749.0% | 260.4% | 6,261 |
| Mahaska County | Reagan, Ronald+1,979 | 6,08659.1% | 4,10739.9% | 1001.0% | 10,293 |
| Marion County | Reagan, Ronald+946 | 7,25953.2% | 6,31346.3% | 620.5% | 13,634 |
| Marshall County | Reagan, Ronald+2,030 | 10,83954.6% | 8,80944.4% | 1921.0% | 19,840 |
| Mills County | Reagan, Ronald+2,560 | 3,99472.8% | 1,43426.1% | 581.1% | 5,486 |
| Mitchell County | Reagan, Ronald+613 | 3,14454.7% | 2,53144.1% | 681.2% | 5,743 |
| Monona County | Reagan, Ronald+587 | 2,74655.4% | 2,15943.5% | 541.1% | 4,959 |
| Monroe County | Mondale, Walter+415 | 1,92744.9% | 2,34254.6% | 220.5% | 4,291 |
| Montgomery County | Reagan, Ronald+2,563 | 4,22471.2% | 1,66128.0% | 450.8% | 5,930 |
| Muscatine County | Reagan, Ronald+3,083 | 9,06959.8% | 5,98639.5% | 1130.7% | 15,168 |
| O'Brien County | Reagan, Ronald+2,529 | 5,00866.2% | 2,47932.8% | 821.1% | 7,569 |
| Osceola County | Reagan, Ronald+1,139 | 2,28566.0% | 1,14633.1% | 320.9% | 3,463 |
| Page County | Reagan, Ronald+3,962 | 5,87675.1% | 1,91424.5% | 380.5% | 7,828 |
| Palo Alto County | Mondale, Walter+303 | 2,71546.7% | 3,01851.9% | 771.3% | 5,810 |
| Plymouth County | Reagan, Ronald+3,018 | 6,48264.6% | 3,46434.5% | 810.8% | 10,027 |
| Pocahontas County | Reagan, Ronald+146 | 2,62750.6% | 2,48147.8% | 801.5% | 5,188 |
| Polk County | Mondale, Walter+4,000 | 71,41348.3% | 75,41351.0% | 1,0220.7% | 147,848 |
| Pottawattamie County | Reagan, Ronald+9,198 | 21,52763.1% | 12,32936.1% | 2560.8% | 34,112 |
| Poweshiek County | Reagan, Ronald+612 | 4,71553.0% | 4,10346.2% | 710.8% | 8,889 |
| Ringgold County | Mondale, Walter+81 | 1,51248.5% | 1,59351.1% | 120.4% | 3,117 |
| Sac County | Reagan, Ronald+935 | 3,29857.6% | 2,36341.2% | 681.2% | 5,729 |
| Scott County | Reagan, Ronald+5,484 | 38,03453.4% | 32,55045.7% | 6280.9% | 71,212 |
| Shelby County | Reagan, Ronald+1,909 | 4,20064.2% | 2,29135.0% | 460.7% | 6,537 |
| Sioux County | Reagan, Ronald+9,080 | 11,66581.6% | 2,58518.1% | 430.3% | 14,293 |
| Story County | Reagan, Ronald+1,527 | 19,80451.6% | 18,27747.6% | 3290.9% | 38,410 |
| Tama County | Reagan, Ronald+821 | 4,88254.3% | 4,06145.2% | 470.5% | 8,990 |
| Taylor County | Reagan, Ronald+997 | 2,49662.1% | 1,49937.3% | 270.7% | 4,022 |
| Union County | Reagan, Ronald+708 | 3,58354.5% | 2,87543.7% | 1181.8% | 6,576 |
| Van Buren County | Reagan, Ronald+532 | 2,13856.7% | 1,60642.6% | 250.7% | 3,769 |
| Wapello County | Mondale, Walter+3,447 | 7,09839.9% | 10,54559.2% | 1570.9% | 17,800 |
| Warren County | Reagan, Ronald+106 | 8,27750.0% | 8,17149.3% | 1220.7% | 16,570 |
| Washington County | Reagan, Ronald+1,534 | 4,61359.4% | 3,07939.6% | 781.0% | 7,770 |
| Wayne County | Reagan, Ronald+134 | 2,06151.3% | 1,92747.9% | 330.8% | 4,021 |
| Webster County | Mondale, Walter+311 | 9,61948.6% | 9,93050.1% | 2531.3% | 19,802 |
| Winnebago County | Reagan, Ronald+947 | 3,61657.3% | 2,66942.3% | 290.5% | 6,314 |
| Winneshiek County | Reagan, Ronald+1,553 | 5,27758.0% | 3,72440.9% | 1041.1% | 9,105 |
| Woodbury County | Reagan, Ronald+4,051 | 23,00254.3% | 18,95144.7% | 3970.9% | 42,350 |
| Worth County | Mondale, Walter+278 | 1,98546.5% | 2,26353.0% | 180.4% | 4,266 |
| Wright County | Reagan, Ronald+695 | 3,67554.8% | 2,98044.4% | 500.7% | 6,705 |
complete certified result
Iowa 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)
Iowa's presidential margins
1892–2024, the 1984 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | −5.3% |
| 1896 | −12.6% |
| 1900 | −18.6% |
| 1904 | −32.7% |
| 1908 | −15.0% |
| 1912 | +13.3% |
| 1916 | −11.4% |
| 1920 | −45.5% |
| 1924 | −38.6% |
| 1928 | −24.2% |
| 1932 | +17.7% |
| 1936 | +11.7% |
| 1940 | −4.4% |
| 1944 | −4.5% |
| 1948 | +2.7% |
| 1952 | −28.2% |
| 1956 | −18.4% |
| 1960 | −13.5% |
| 1964 | +24.0% |
| 1968 | −12.2% |
| 1972 | −17.1% |
| 1976 | −1.0% |
| 1980 | −12.7% |
| 1984 | −7.4% |
| 1988 | +10.2% |
| 1992 | +6.0% |
| 1996 | +10.3% |
| 2000 | +0.3% |
| 2004 | −0.7% |
| 2008 | +9.5% |
| 2012 | +5.8% |
| 2016 | −9.3% |
| 2020 | −8.2% |
| 2024 | −13.2% |
Same ballot, 1984IA
Source. MIT Election Data + Science Lab — 1984 presidential returns · official county-level results. Real returns — nothing estimated.