| Birth Name: | William Gaines Farish |
| Birth Date: | 18 June 1847 |
| Birth Place: | Albemarle, Virginia, U.S. |
| Death Place: | Earlysville, Virginia, U.S. |
| Office1: | Member of the Virginia House of Delegates for Albemarle and Charlottesville |
| Term Start1: | December 2, 1891 |
| Term End1: | December 6, 1893 |
| Alongside1: | John T. Tilman |
| Predecessor1: | Walter D. Dabney |
| Successor1: | John B. Moon |
| Party: | Democratic |
| Branch: | Confederate States Army |
| Rank: | Private |
| Battles: | American Civil War |
William Gaines Farish (June 18, 1847 – January 22, 1931) was an American politician who served in the Virginia House of Delegates.[1]