| William Marvin Howe | |
| Birth Date: | 24 February 1906 |
| Birth Place: | Palmerston, Ontario, Canada |
| Riding: | Wellington—Huron |
| Term Start: | August 1953 |
| Term End: | June 1968 |
| Riding2: | Wellington—Grey |
| Term Start2: | June 1968 |
| Term End2: | September 1972 |
| Profession: | merchant |
| Party: | Progressive Conservative |
William Marvin Howe (24 February 1906 – 17 July 1996) was a Progressive Conservative party member of the House of Commons of Canada. He was born in Palmerston, Ontario and became a merchant by career.
Marvin Howe was first elected at the Wellington—Huron riding in the 1953 general election, then re-elected there in 1957, 1958, 1962, 1963 and 1965. In the 1968 federal election, Howe was re-elected at the newly configured Wellington—Grey riding. In 1972, after completing his term in the 28th Canadian Parliament, Howe left federal office and did not seek re-election to the House of Commons.