| John S. Watrous | |
| Order: | 1st |
| Office: | Speaker of the Minnesota House of Representatives |
| Term Start: | December 2, 1857 |
| Term End: | March 12, 1858 |
| Predecessor: | Joseph W. Furber (Territorial) |
| Successor: | George Bradley |
| State1: | Minnesota |
| State House1: | Minnesota |
| District1: | 26th |
| Term Start1: | December 2, 1857 |
| Term End1: | December 6, 1859 |
| Predecessor1: | Position established |
| Successor1: | William Nettleton |
| State2: | Wisconsin |
| State Assembly2: | Wisconsin |
| District2: | St. Croix - La Pointe |
| Term Start2: | January 7, 1850 |
| Term End2: | January 6, 1851 |
| Predecessor2: | Joseph Bowron |
| Successor2: | John O. Henning |
| Party: | Democratic |
| Birth Place: | Ashtabula, Ohio, U.S. |
| Death Date: | 1897 |
| Death Place: | California, U.S. |
John S. Watrous (died 1897) was a politician from Minnesota, and a former member of the Minnesota House of Representatives, representing St. Louis County, Minnesota. Watrous was the first Speaker of the Minnesota House of Representatives, a position he held from the convention of the 1st Minnesota Legislature in December 1857, until the Speaker's chair was declared vacant on March 12, 1858, due to a prolonged absence during which he was handling private business.[1]
Watrous died in 1897.
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