| Birthname: | William Allen Garrett |
| State Senate3: | Virginia |
| District3: | 13th |
| Term Start3: | January 9, 1924 |
| Term End3: | January 10, 1940 |
| Preceded3: | C. O'Conor Goolrick |
| Succeeded3: | John W. Carter, Jr. |
| State Senate5: | Virginia |
| District5: | 23rd |
| Term Start5: | December 4, 1901 |
| Term End5: | January 9, 1924 |
| Preceded5: | Rorer A. James |
| Succeeded5: | Samuel S. Lambeth, Jr. |
| Office6: | Member of the Virginia House of Delegates from Henry County |
| Term Start6: | December 1, 1897 |
| Term End6: | December 6, 1899 |
| Preceded6: | John R. Armstrong |
| Succeeded6: | William H. Gravely |
| Birth Date: | 27 July 1854 |
| Birth Place: | Rockingham, North Carolina |
| Death Place: | Rockingham, North Carolina |
| Party: | Democratic |
| Spouse: | Susan Emily Trent Emma Washington Garrett |
William Allen Garrett (July 27, 1854 – June 21, 1951) was an American lawyer and Democratic politician who served as a member of the Virginia Senate from 1901 to 1940.[1] [2]