Department of Marine and Fisheries and the Naval Service was the department responsible for marine, fisheries and the Naval Service of Canada from 1911 to 1921.
The minister in charge was Minister of Marine and Fisheries and the Naval Service.
The department was originally the Department of Marine and Fisheries and added naval duties following the creation of NSC in 1911. In 1921, the naval component was transferred to the Department of Militia and Defence and the Naval Service and reverted to the old department name for the next decade.
| 1. | Rodolphe Lemieux | August 11, 1911 - October 6, 1911 | Cabinet of Prime Minister Sir Wilfrid Laurier |
| 2. | John Douglas Hazen | October 10, 1911 - October 12, 1917 | Cabinet of Prime Minister Robert Borden |
| 3. | Charles Ballantyne | October 13, 1917 - July 10, 1920 | Cabinet of Prime Minister Robert Borden |
| 4. | Charles Ballantyne | July 10, 1920 - December 29, 1921 | Cabinet of Prime Minister Arthur Meighen |