| John Wiik | |
| Office: | Chair of the South Dakota Republican Party |
| Term Start: | January 14, 2023 |
| Predecessor: | Dan Lederman |
| State Senate1: | South Dakota |
| District1: | 4th |
| Term Start1: | January 10, 2017 |
| Predecessor1: | Jim Peterson |
| State House2: | South Dakota |
| District2: | 4th |
| Term Start2: | January 13, 2015 |
| Term End2: | January 10, 2017 |
| Predecessor2: | Kathy Tyler Jim Peterson |
| Successor2: | Jason Kettwig John Mills |
| Birth Date: | 28 March 1972 |
| Birth Place: | Ortonville, Minnesota, U.S. |
| Party: | Republican |
| Education: | Interstate Business College |
John Wiik (born March 28, 1972) is an American politician who has served in the South Dakota Senate from the 4th district since 2017. He previously served in the South Dakota House of Representatives from the 4th district from 2015 to 2017.[1] [2]