| Martin Zephyr | |
| Birth Date: | 1931 3, df=y |
| Death Place: | United States |
| Office: | Speaker of the National Assembly of Guyana |
| Term Start: | 23 October 2000 |
| Term End: | 15 February 2001 |
| Predecessor: | Derek Chunilall Jagan |
| Successor: | Ralph Ramkarran |
| Party: | People's Progressive Party |
| Occupation: | lawyer |
Winslow Martin Zephyr (1 March 1931 – 10 June 2009) was a Guyanese politician and lawyer. He served as Deputy Speaker of the National Assembly from 1998 to 2000.[1] After the death of Derek Jagan, Zephyr was elected Speaker of the National Assembly of Guyana and served until 2001[2] [3] He died in the United States on 10 June 2009.[3]