| Birthname: | William Washington Baker |
| Birth Date: | October 20, 1844 |
| Birth Place: | Chesterfield, Virginia, U.S. |
| Death Place: | Chesterfield, Virginia, U.S. |
| Office: | Member of the Virginia House of Delegates from Chesterfield County |
| Term Start: | January 13, 1904 |
| Term End: | January 9, 1918 |
| Predecessor: | None (district created) |
| Successor: | John F. Ragland Jr. |
| Office1: | Member of the Virginia House of Delegates for Chesterfield, Manchester, and Powhatan |
| Term Start1: | December 6, 1899 |
| Term End1: | January 13, 1904 |
| Predecessor1: | Harry B. Owen |
| Successor1: | Carter H. Harrison |
| Term Start2: | December 5, 1883 |
| Term End2: | December 2, 1885 |
| Predecessor2: | William F. Giddings |
| Successor2: | Thomas M. Miller |
| Party: | Democratic |
| Spouse: | Sarah Thomas Martin |
| Signature: | W W Baker signature.png |
| Branch: | Confederate States Navy Confederate States Army |
| Serviceyears: | 1863–1865 |
| Unit: | 25th Virginia Infantry |
| Battles: | American Civil War |
William Washington Baker (October 20, 1844 – February 21, 1927) was an American Democratic politician who served as a member of the Virginia House of Delegates, representing his native Chesterfield County.[1] [2]