| Top 2016 Ohio Presidential Republican Counties by Percentage |
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| Rank | Region | Votes | % of Votes |
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| 1 | Mercer County | 17,200 | 80.7 | | 2 | Putnam County | 14,704 | 80.0 | | 3 | Darke County | 19,698 | 78.8 | | 4 | Holmes County | 8,578 | 79.3 | | 5 | Shelby County | 18,148 | 78.5 | | 6 | Auglaize County | 18,130 | 79.3 | | 7 | Van Wert County | 10,328 | 76.0 | 
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