South Dakota — 1984 presidential election
Recent presidential results
Akashicstate1984 presidential electionSouth Dakota · PresidentReaganR+26.5
How it voted
Share of the 1984 vote
| Ronald Reagan ✓Republican | 63.0% | 200,267 |
|---|---|---|
| Walter MondaleDemocratic | 36.5% | 116,113 |
| OtherAll other candidates | 0.5% | 1,487 |
1984presidential margin
D+60R+60
66 counties, each filled by 1984 D-vs-R margin. Hover any county for its result.
South Dakota cast 3 electoral votes this cycle.
County-level results (66 counties) — table
| County | Winner | Margin |
|---|---|---|
| Aurora County, SD | Republican | R+10.0 |
| Beadle County, SD | Republican | R+25.0 |
| Bennett County, SD | Republican | R+30.6 |
| Bon Homme County, SD | Republican | R+27.4 |
| Brookings County, SD | Republican | R+24.0 |
| Brown County, SD | Republican | R+21.1 |
| Brule County, SD | Republican | R+24.1 |
| Buffalo County, SD | Republican | R+3.4 |
| Butte County, SD | Republican | R+56.7 |
| Campbell County, SD | Republican | R+65.4 |
| Charles Mix County, SD | Republican | R+17.1 |
| Clark County, SD | Republican | R+29.0 |
| Clay County, SD | Republican | R+6.0 |
| Codington County, SD | Republican | R+26.7 |
| Corson County, SD | Republican | R+9.3 |
| Custer County, SD | Republican | R+43.3 |
| Davison County, SD | Republican | R+19.1 |
| Day County, SD | Republican | R+5.3 |
| Deuel County, SD | Republican | R+23.9 |
| Dewey County, SD | Republican | R+9.8 |
| Douglas County, SD | Republican | R+52.2 |
| Edmunds County, SD | Republican | R+21.2 |
| Fall River County, SD | Republican | R+41.3 |
| Faulk County, SD | Republican | R+31.9 |
| Grant County, SD | Republican | R+26.0 |
| Gregory County, SD | Republican | R+38.8 |
| Haakon County, SD | Republican | R+66.0 |
| Hamlin County, SD | Republican | R+29.7 |
| Hand County, SD | Republican | R+41.0 |
| Hanson County, SD | Republican | R+17.8 |
| Harding County, SD | Republican | R+58.9 |
| Hughes County, SD | Republican | R+41.1 |
| Hutchinson County, SD | Republican | R+46.2 |
| Hyde County, SD | Republican | R+38.9 |
| Jackson County, SD | Republican | R+42.2 |
| Jerauld County, SD | Republican | R+30.1 |
| Jones County, SD | Republican | R+53.7 |
| Kingsbury County, SD | Republican | R+25.8 |
| Lake County, SD | Republican | R+12.2 |
| Lawrence County, SD | Republican | R+39.5 |
| Lincoln County, SD | Republican | R+20.5 |
| Lyman County, SD | Republican | R+40.0 |
| Marshall County, SD | Republican | R+15.8 |
| McCook County, SD | Republican | R+13.5 |
| McPherson County, SD | Republican | R+62.4 |
| Meade County, SD | Republican | R+47.4 |
| Mellette County, SD | Republican | R+33.8 |
| Miner County, SD | Republican | R+2.2 |
| Minnehaha County, SD | Republican | R+12.9 |
| Moody County, SD | Republican | R+1.5 |
| Oglala Lakota County, SD | Democratic | D+63.7 |
| Pennington County, SD | Republican | R+45.2 |
| Perkins County, SD | Republican | R+40.3 |
| Potter County, SD | Republican | R+52.5 |
| Roberts County, SD | Republican | R+14.5 |
| Sanborn County, SD | Republican | R+27.7 |
| Spink County, SD | Republican | R+21.9 |
| Stanley County, SD | Republican | R+45.5 |
| Sully County, SD | Republican | R+51.5 |
| Todd County, SD | Democratic | D+20.0 |
| Tripp County, SD | Republican | R+45.0 |
| Turner County, SD | Republican | R+34.8 |
| Union County, SD | Republican | R+4.5 |
| Walworth County, SD | Republican | R+50.6 |
| Yankton County, SD | Republican | R+27.4 |
| Ziebach County, SD | Republican | R+8.8 |
South Dakota results by county
66 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 | |||||
|---|---|---|---|---|---|
| Aurora County | Reagan, Ronald+189 | 1,02954.6% | 84044.6% | 140.7% | 1,883 |
| Beadle County | Reagan, Ronald+2,353 | 5,87662.4% | 3,52337.4% | 230.2% | 9,422 |
| Bennett County | Reagan, Ronald+403 | 85665.0% | 45334.4% | 70.5% | 1,316 |
| Bon Homme County | Reagan, Ronald+1,070 | 2,47863.4% | 1,40836.0% | 200.5% | 3,906 |
| Brookings County | Reagan, Ronald+2,590 | 6,67961.8% | 4,08937.8% | 460.4% | 10,814 |
| Brown County | Reagan, Ronald+3,689 | 10,54160.4% | 6,85239.2% | 720.4% | 17,465 |
| Brule County | Reagan, Ronald+617 | 1,57861.7% | 96137.6% | 170.7% | 2,556 |
| Buffalo County | Reagan, Ronald+17 | 25351.2% | 23647.8% | 51.0% | 494 |
| Butte County | Reagan, Ronald+2,081 | 2,86578.1% | 78421.4% | 180.5% | 3,667 |
| Campbell County | Reagan, Ronald+821 | 1,03582.5% | 21417.1% | 60.5% | 1,255 |
| Charles Mix County | Reagan, Ronald+781 | 2,66058.3% | 1,87941.2% | 240.5% | 4,563 |
| Clark County | Reagan, Ronald+788 | 1,74864.3% | 96035.3% | 100.4% | 2,718 |
| Clay County | Reagan, Ronald+346 | 3,05752.6% | 2,71146.7% | 400.7% | 5,808 |
| Codington County | Reagan, Ronald+2,580 | 6,10863.1% | 3,52836.5% | 420.4% | 9,678 |
| Corson County | Reagan, Ronald+163 | 95554.5% | 79245.2% | 60.3% | 1,753 |
| Custer County | Reagan, Ronald+1,325 | 2,18371.3% | 85828.0% | 220.7% | 3,063 |
| Davison County | Reagan, Ronald+1,535 | 4,78359.4% | 3,24840.4% | 170.2% | 8,048 |
| Day County | Reagan, Ronald+218 | 2,15052.4% | 1,93247.1% | 190.5% | 4,101 |
| Deuel County | Reagan, Ronald+596 | 1,53761.7% | 94137.8% | 120.5% | 2,490 |
| Dewey County | Reagan, Ronald+169 | 94154.5% | 77244.7% | 140.8% | 1,727 |
| Douglas County | Reagan, Ronald+1,177 | 1,71376.0% | 53623.8% | 50.2% | 2,254 |
| Edmunds County | Reagan, Ronald+546 | 1,55360.4% | 1,00739.2% | 100.4% | 2,570 |
| Fall River County | Reagan, Ronald+1,613 | 2,74870.4% | 1,13529.1% | 220.6% | 3,905 |
| Faulk County | Reagan, Ronald+545 | 1,12465.9% | 57933.9% | 30.2% | 1,706 |
| Grant County | Reagan, Ronald+1,132 | 2,73862.8% | 1,60636.8% | 160.4% | 4,360 |
| Gregory County | Reagan, Ronald+997 | 1,77769.2% | 78030.4% | 120.5% | 2,569 |
| Haakon County | Reagan, Ronald+931 | 1,16882.8% | 23716.8% | 50.4% | 1,410 |
| Hamlin County | Reagan, Ronald+819 | 1,78264.5% | 96334.9% | 160.6% | 2,761 |
| Hand County | Reagan, Ronald+1,184 | 2,03070.3% | 84629.3% | 100.3% | 2,886 |
| Hanson County | Reagan, Ronald+273 | 89858.7% | 62540.8% | 70.5% | 1,530 |
| Harding County | Reagan, Ronald+537 | 72379.3% | 18620.4% | 30.3% | 912 |
| Hughes County | Reagan, Ronald+2,913 | 4,98570.3% | 2,07229.2% | 320.5% | 7,089 |
| Hutchinson County | Reagan, Ronald+2,135 | 3,37272.9% | 1,23726.8% | 150.3% | 4,624 |
| Hyde County | Reagan, Ronald+447 | 79769.4% | 35030.5% | 10.1% | 1,148 |
| Jackson County | Reagan, Ronald+538 | 90370.8% | 36528.6% | 70.5% | 1,275 |
| Jerauld County | Reagan, Ronald+470 | 1,01264.8% | 54234.7% | 80.5% | 1,562 |
| Jones County | Reagan, Ronald+483 | 68976.6% | 20622.9% | 40.4% | 899 |
| Kingsbury County | Reagan, Ronald+872 | 2,12162.7% | 1,24936.9% | 130.4% | 3,383 |
| Lake County | Reagan, Ronald+660 | 3,02755.9% | 2,36743.7% | 190.4% | 5,413 |
| Lawrence County | Reagan, Ronald+3,384 | 5,94969.4% | 2,56529.9% | 550.6% | 8,569 |
| Lincoln County | Reagan, Ronald+1,362 | 3,98860.1% | 2,62639.6% | 220.3% | 6,636 |
| Lyman County | Reagan, Ronald+642 | 1,12069.8% | 47829.8% | 70.4% | 1,605 |
| Marshall County | Reagan, Ronald+418 | 1,52957.7% | 1,11141.9% | 90.3% | 2,649 |
| McCook County | Reagan, Ronald+454 | 1,90256.6% | 1,44843.1% | 120.4% | 3,362 |
| McPherson County | Reagan, Ronald+1,395 | 1,81381.1% | 41818.7% | 50.2% | 2,236 |
| Meade County | Reagan, Ronald+3,815 | 5,90873.5% | 2,09326.0% | 400.5% | 8,041 |
| Mellette County | Reagan, Ronald+313 | 61666.5% | 30332.7% | 80.9% | 927 |
| Miner County | Reagan, Ronald+44 | 1,00450.8% | 96048.6% | 130.7% | 1,977 |
| Minnehaha County | Reagan, Ronald+6,866 | 29,90856.2% | 23,04243.3% | 2210.4% | 53,171 |
| Moody County | Reagan, Ronald+47 | 1,63350.6% | 1,58649.1% | 90.3% | 3,228 |
| Oglala Lakota County | Mondale, Walter+1,165 | 32417.7% | 1,48981.4% | 160.9% | 1,829 |
| Pennington County | Reagan, Ronald+13,723 | 21,94772.2% | 8,22427.1% | 2180.7% | 30,389 |
| Perkins County | Reagan, Ronald+972 | 1,68669.9% | 71429.6% | 110.5% | 2,411 |
| Potter County | Reagan, Ronald+1,069 | 1,55176.2% | 48223.7% | 20.1% | 2,035 |
| Roberts County | Reagan, Ronald+704 | 2,76757.2% | 2,06342.6% | 100.2% | 4,840 |
| Sanborn County | Reagan, Ronald+469 | 1,08063.7% | 61136.0% | 40.2% | 1,695 |
| Spink County | Reagan, Ronald+947 | 2,62760.8% | 1,68038.9% | 170.4% | 4,324 |
| Stanley County | Reagan, Ronald+591 | 94272.5% | 35127.0% | 60.5% | 1,299 |
| Sully County | Reagan, Ronald+570 | 83675.5% | 26624.0% | 50.5% | 1,107 |
| Todd County | Mondale, Walter+343 | 67939.6% | 1,02259.6% | 130.8% | 1,714 |
| Tripp County | Reagan, Ronald+1,548 | 2,48372.2% | 93527.2% | 220.6% | 3,440 |
| Turner County | Reagan, Ronald+1,600 | 3,08667.2% | 1,48632.4% | 200.4% | 4,592 |
| Union County | Reagan, Ronald+210 | 2,43152.0% | 2,22147.5% | 250.5% | 4,677 |
| Walworth County | Reagan, Ronald+1,617 | 2,39675.0% | 77924.4% | 190.6% | 3,194 |
| Yankton County | Reagan, Ronald+2,229 | 5,16163.4% | 2,93236.0% | 520.6% | 8,145 |
| Ziebach County | Reagan, Ronald+70 | 42954.2% | 35945.3% | 40.5% | 792 |
complete certified result
South Dakota 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)
South Dakota's presidential margins
1892–2024, the 1984 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | −36.5% |
| 1896 | +0.2% |
| 1900 | −15.6% |
| 1904 | −49.4% |
| 1908 | −23.8% |
| 1912 | +42.1% |
| 1916 | −3.9% |
| 1920 | −41.0% |
| 1924 | −36.3% |
| 1928 | −21.0% |
| 1932 | +29.2% |
| 1936 | +11.5% |
| 1940 | −14.8% |
| 1944 | −16.7% |
| 1948 | −4.8% |
| 1952 | −38.5% |
| 1956 | −16.8% |
| 1960 | −16.4% |
| 1964 | +11.2% |
| 1968 | −11.3% |
| 1972 | −8.6% |
| 1976 | −1.5% |
| 1980 | −28.8% |
| 1984 | −26.5% |
| 1988 | −6.3% |
| 1992 | −3.5% |
| 1996 | −3.5% |
| 2000 | −22.7% |
| 2004 | −21.3% |
| 2008 | −8.4% |
| 2012 | −18.0% |
| 2016 | −29.8% |
| 2020 | −26.2% |
| 2024 | −29.2% |
Same ballot, 1984SD
Source. MIT Election Data + Science Lab — 1984 presidential returns · official county-level results. Real returns — nothing estimated.