| John William Clark Watson | |
| Office: | Confederate States Senator from Mississippi |
| Term Start: | February 17, 1864 |
| Term End: | May 10, 1865 |
| Predecessor: | James Phelan |
| Successor: | Constituency abolished |
| Birth Name: | John William Clark Watson |
| Birth Date: | 27 February 1808 |
| Birth Place: | Albemarle County, Virginia, US |
| Death Place: | Holly Springs, Mississippi, US |
| Party: | Whig prior to Civil War.[1] Democratic after Civil War.[2] |
| Alma Mater: | University of Virginia |
John William Clark Watson (February 27, 1808 - September 24, 1890) was an American politician who served as a Confederate States Senator from Mississippi from 1864 to 1865.