| Top 2016 South Dakota Presidential Republican Counties by Percentage |
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| Rank | Region | Votes | % of Votes |
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| 1 | Haakon County | 936 | 89.7 | | 2 | Harding County | 694 | 90.2 | | 3 | Campbell County | 704 | 84.7 | | 4 | Perkins County | 1,333 | 83.0 | | 5 | Douglas County | 1,338 | 83.4 | | 6 | Jones County | 450 | 80.6 | | 7 | Potter County | 1,069 | 80.1 | 
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