Senate Elections 2020 | US Senate Elections | South Dakota Races
2020 South Dakota U.S. Senate Election Results
Mike Rounds
Percent: 65.74%
Votes: 276,232
Dan Ahlers
Percent: 34.26%
Votes: 143,987
Race Summary
In the 2020 US Senate election in South Dakota on November 3, Republican incumbent Mike Rounds was re-elected to a second term, defeating Democratic challenger Dan Ahlers with 65.74% of the vote to Ahlers's 34.26%. Rounds's victory margin of over 31 percentage points underscored South Dakota's strong Republican leanings.
Full Results
Mike Rounds (REP)
Percent: 65.74%
Votes: 276,232
Dan Ahlers (DEM)
Percent: 34.26%
Votes: 143,987
Total votes: 420,219
State Map
Results by County
Aurora County
Mike Rounds (REP)
Percent: 71.32%
Votes: 1,002
Dan Ahlers (DEM)
Percent: 28.68%
Votes: 403
Total votes: 1,405
Brookings County
Mike Rounds (REP)
Percent: 60.48%
Votes: 8,792
Dan Ahlers (DEM)
Percent: 39.52%
Votes: 5,746
Total votes: 14,538
Butte County
Mike Rounds (REP)
Percent: 79.85%
Votes: 3,809
Dan Ahlers (DEM)
Percent: 20.15%
Votes: 961
Total votes: 4,770
Clay County
Mike Rounds (REP)
Percent: 50.44%
Votes: 2,857
Dan Ahlers (DEM)
Percent: 49.56%
Votes: 2,807
Total votes: 5,664
Davison County
Mike Rounds (REP)
Percent: 69.88%
Votes: 5,893
Dan Ahlers (DEM)
Percent: 30.12%
Votes: 2,540
Total votes: 8,433
Douglas County
Mike Rounds (REP)
Percent: 86.21%
Votes: 1,469
Dan Ahlers (DEM)
Percent: 13.79%
Votes: 235
Total votes: 1,704
Grant County
Mike Rounds (REP)
Percent: 72.63%
Votes: 2,723
Dan Ahlers (DEM)
Percent: 27.37%
Votes: 1,026
Total votes: 3,749
Hand County
Mike Rounds (REP)
Percent: 79.66%
Votes: 1,480
Dan Ahlers (DEM)
Percent: 20.34%
Votes: 378
Total votes: 1,858
Hutchinson County
Mike Rounds (REP)
Percent: 79.44%
Votes: 2,982
Dan Ahlers (DEM)
Percent: 20.56%
Votes: 772
Total votes: 3,754
Jones County
Mike Rounds (REP)
Percent: 83.39%
Votes: 497
Dan Ahlers (DEM)
Percent: 16.61%
Votes: 99
Total votes: 596
Lincoln County
Mike Rounds (REP)
Percent: 65.83%
Votes: 21,221
Dan Ahlers (DEM)
Percent: 34.17%
Votes: 11,013
Total votes: 32,234
McPherson County
Mike Rounds (REP)
Percent: 82.21%
Votes: 1,086
Dan Ahlers (DEM)
Percent: 17.79%
Votes: 235
Total votes: 1,321
Minnehaha County
Mike Rounds (REP)
Percent: 57.63%
Votes: 52,773
Dan Ahlers (DEM)
Percent: 42.37%
Votes: 38,799
Total votes: 91,572
Perkins County
Mike Rounds (REP)
Percent: 84.85%
Votes: 1,395
Dan Ahlers (DEM)
Percent: 15.15%
Votes: 249
Total votes: 1,644
Spink County
Mike Rounds (REP)
Percent: 68.84%
Votes: 2,178
Dan Ahlers (DEM)
Percent: 31.16%
Votes: 986
Total votes: 3,164
Tripp County
Mike Rounds (REP)
Percent: 81.34%
Votes: 2,188
Dan Ahlers (DEM)
Percent: 18.66%
Votes: 502
Total votes: 2,690
Yankton County
Mike Rounds (REP)
Percent: 64.51%
Votes: 6,994
Dan Ahlers (DEM)
Percent: 35.49%
Votes: 3,848
Total votes: 10,842
Beadle County
Mike Rounds (REP)
Percent: 71.99%
Votes: 5,104
Dan Ahlers (DEM)
Percent: 28.01%
Votes: 1,986
Total votes: 7,090
Brown County
Mike Rounds (REP)
Percent: 64.00%
Votes: 11,168
Dan Ahlers (DEM)
Percent: 36.00%
Votes: 6,283
Total votes: 17,451
Campbell County
Mike Rounds (REP)
Percent: 85.93%
Votes: 745
Dan Ahlers (DEM)
Percent: 14.07%
Votes: 122
Total votes: 867
Codington County
Mike Rounds (REP)
Percent: 72.33%
Votes: 9,479
Dan Ahlers (DEM)
Percent: 27.67%
Votes: 3,626
Total votes: 13,105
Day County
Mike Rounds (REP)
Percent: 63.93%
Votes: 1,895
Dan Ahlers (DEM)
Percent: 36.07%
Votes: 1,069
Total votes: 2,964
Edmunds County
Mike Rounds (REP)
Percent: 77.45%
Votes: 1,539
Dan Ahlers (DEM)
Percent: 22.55%
Votes: 448
Total votes: 1,987
Gregory County
Mike Rounds (REP)
Percent: 78.35%
Votes: 1,766
Dan Ahlers (DEM)
Percent: 21.65%
Votes: 488
Total votes: 2,254
Hanson County
Mike Rounds (REP)
Percent: 76.10%
Votes: 1,796
Dan Ahlers (DEM)
Percent: 23.90%
Votes: 564
Total votes: 2,360
Hyde County
Mike Rounds (REP)
Percent: 79.89%
Votes: 568
Dan Ahlers (DEM)
Percent: 20.11%
Votes: 143
Total votes: 711
Kingsbury County
Mike Rounds (REP)
Percent: 70.89%
Votes: 1,970
Dan Ahlers (DEM)
Percent: 29.11%
Votes: 809
Total votes: 2,779
Lyman County
Mike Rounds (REP)
Percent: 66.67%
Votes: 1,066
Dan Ahlers (DEM)
Percent: 33.33%
Votes: 533
Total votes: 1,599
Meade County
Mike Rounds (REP)
Percent: 76.53%
Votes: 10,355
Dan Ahlers (DEM)
Percent: 23.47%
Votes: 3,176
Total votes: 13,531
Moody County
Mike Rounds (REP)
Percent: 58.29%
Votes: 1,877
Dan Ahlers (DEM)
Percent: 41.71%
Votes: 1,343
Total votes: 3,220
Potter County
Mike Rounds (REP)
Percent: 83.82%
Votes: 1,160
Dan Ahlers (DEM)
Percent: 16.18%
Votes: 224
Total votes: 1,384
Stanley County
Mike Rounds (REP)
Percent: 77.12%
Votes: 1,274
Dan Ahlers (DEM)
Percent: 22.88%
Votes: 378
Total votes: 1,652
Turner County
Mike Rounds (REP)
Percent: 75.21%
Votes: 3,416
Dan Ahlers (DEM)
Percent: 24.79%
Votes: 1,126
Total votes: 4,542
Ziebach County
Mike Rounds (REP)
Percent: 49.56%
Votes: 450
Dan Ahlers (DEM)
Percent: 50.44%
Votes: 458
Total votes: 908
Bennett County
Mike Rounds (REP)
Percent: 62.52%
Votes: 729
Dan Ahlers (DEM)
Percent: 37.48%
Votes: 437
Total votes: 1,166
Brule County
Mike Rounds (REP)
Percent: 69.65%
Votes: 1,735
Dan Ahlers (DEM)
Percent: 30.35%
Votes: 756
Total votes: 2,491
Charles Mix County
Mike Rounds (REP)
Percent: 66.88%
Votes: 2,542
Dan Ahlers (DEM)
Percent: 33.12%
Votes: 1,259
Total votes: 3,801
Corson County
Mike Rounds (REP)
Percent: 53.88%
Votes: 681
Dan Ahlers (DEM)
Percent: 46.12%
Votes: 583
Total votes: 1,264
Deuel County
Mike Rounds (REP)
Percent: 73.19%
Votes: 1,714
Dan Ahlers (DEM)
Percent: 26.81%
Votes: 628
Total votes: 2,342
Fall River County
Mike Rounds (REP)
Percent: 75.19%
Votes: 3,009
Dan Ahlers (DEM)
Percent: 24.81%
Votes: 993
Total votes: 4,002
Haakon County
Mike Rounds (REP)
Percent: 90.69%
Votes: 1,032
Dan Ahlers (DEM)
Percent: 9.31%
Votes: 106
Total votes: 1,138
Harding County
Mike Rounds (REP)
Percent: 90.88%
Votes: 727
Dan Ahlers (DEM)
Percent: 9.13%
Votes: 73
Total votes: 800
Jackson County
Mike Rounds (REP)
Percent: 67.92%
Votes: 756
Dan Ahlers (DEM)
Percent: 32.08%
Votes: 357
Total votes: 1,113
Lake County
Mike Rounds (REP)
Percent: 64.84%
Votes: 3,816
Dan Ahlers (DEM)
Percent: 35.16%
Votes: 2,069
Total votes: 5,885
Marshall County
Mike Rounds (REP)
Percent: 61.00%
Votes: 1,334
Dan Ahlers (DEM)
Percent: 39.00%
Votes: 853
Total votes: 2,187
Mellette County
Mike Rounds (REP)
Percent: 60.70%
Votes: 468
Dan Ahlers (DEM)
Percent: 39.30%
Votes: 303
Total votes: 771
Oglala Lakota County
Mike Rounds (REP)
Percent: 15.93%
Votes: 510
Dan Ahlers (DEM)
Percent: 84.07%
Votes: 2,691
Total votes: 3,201
Roberts County
Mike Rounds (REP)
Percent: 58.87%
Votes: 2,529
Dan Ahlers (DEM)
Percent: 41.13%
Votes: 1,767
Total votes: 4,296
Sully County
Mike Rounds (REP)
Percent: 81.88%
Votes: 759
Dan Ahlers (DEM)
Percent: 18.12%
Votes: 168
Total votes: 927
Union County
Mike Rounds (REP)
Percent: 72.56%
Votes: 6,364
Dan Ahlers (DEM)
Percent: 27.44%
Votes: 2,407
Total votes: 8,771
Bon Homme County
Mike Rounds (REP)
Percent: 72.11%
Votes: 2,156
Dan Ahlers (DEM)
Percent: 27.89%
Votes: 834
Total votes: 2,990
Buffalo County
Mike Rounds (REP)
Percent: 40.92%
Votes: 223
Dan Ahlers (DEM)
Percent: 59.08%
Votes: 322
Total votes: 545
Clark County
Mike Rounds (REP)
Percent: 75.64%
Votes: 1,397
Dan Ahlers (DEM)
Percent: 24.36%
Votes: 450
Total votes: 1,847
Custer County
Mike Rounds (REP)
Percent: 72.82%
Votes: 3,973
Dan Ahlers (DEM)
Percent: 27.18%
Votes: 1,483
Total votes: 5,456
Dewey County
Mike Rounds (REP)
Percent: 45.43%
Votes: 884
Dan Ahlers (DEM)
Percent: 54.57%
Votes: 1,062
Total votes: 1,946
Faulk County
Mike Rounds (REP)
Percent: 82.07%
Votes: 975
Dan Ahlers (DEM)
Percent: 17.93%
Votes: 213
Total votes: 1,188
Hamlin County
Mike Rounds (REP)
Percent: 78.60%
Votes: 2,413
Dan Ahlers (DEM)
Percent: 21.40%
Votes: 657
Total votes: 3,070
Hughes County
Mike Rounds (REP)
Percent: 70.95%
Votes: 6,217
Dan Ahlers (DEM)
Percent: 29.05%
Votes: 2,546
Total votes: 8,763
Jerauld County
Mike Rounds (REP)
Percent: 72.22%
Votes: 720
Dan Ahlers (DEM)
Percent: 27.78%
Votes: 277
Total votes: 997
Lawrence County
Mike Rounds (REP)
Percent: 68.29%
Votes: 9,385
Dan Ahlers (DEM)
Percent: 31.71%
Votes: 4,358
Total votes: 13,743
McCook County
Mike Rounds (REP)
Percent: 71.28%
Votes: 2,072
Dan Ahlers (DEM)
Percent: 28.72%
Votes: 835
Total votes: 2,907
Miner County
Mike Rounds (REP)
Percent: 70.42%
Votes: 807
Dan Ahlers (DEM)
Percent: 29.58%
Votes: 339
Total votes: 1,146
Pennington County
Mike Rounds (REP)
Percent: 66.27%
Votes: 37,694
Dan Ahlers (DEM)
Percent: 33.73%
Votes: 19,184
Total votes: 56,878
Sanborn County
Mike Rounds (REP)
Percent: 76.17%
Votes: 898
Dan Ahlers (DEM)
Percent: 23.83%
Votes: 281
Total votes: 1,179
Todd County
Mike Rounds (REP)
Percent: 28.22%
Votes: 706
Dan Ahlers (DEM)
Percent: 71.78%
Votes: 1,796
Total votes: 2,502
Walworth County
Mike Rounds (REP)
Percent: 79.53%
Votes: 2,040
Dan Ahlers (DEM)
Percent: 20.47%
Votes: 525
Total votes: 2,565