| Port Martin | |
| Native Name: | Port-Martin |
| Native Name Lang: | fr |
| Settlement Type: | Antarctic research station |
| Pushpin Map: | Antarctica |
| Pushpin Map Caption: | Location in Antarctica |
| Pushpin Relief: | y |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Region |
| Subdivision Name: | Adélie Land |
| Subdivision Type1: | Location |
| Subdivision Name1: | Cape Margerie |
| Established Title: | Established |
| Extinct Title: | Destroyed |
| Named For: | André-Paul Martin |
| Government Type: | Administration |
| Governing Body: | French Antarctic Expedition |
| Population Blank1 Title: | Summer |
| Population Blank2 Title: | Winter |
| Blank Name Sec1: | Active times |
| Blank Info Sec1: | All year-round |
| Blank1 Name Sec1: | Activities |
| Blank2 Name Sec1: | Facilities |
Port Martin, or Port-Martin, is an abandoned French research base at Cape Margerie on the coast of Adélie Land, Antarctica, as well as the name of the adjacent anchorage.
The site was discovered in 1950 by the Fifth French Antarctic Expedition under and a landing made on 18 January 1950. The base was established by Liotard and a team of 11 men who raised the main building with several annexes to house scientific activities. It was named for expeditioner (aka J.A. Martin), originally second-in-command of the group, who had died of a stroke off South Africa as the expedition was en route to the Antarctic.
On 6 January 1951 the base team was relieved by 17-member team under the leadership of . Over the following year they enlarged the main building while continuing the research program. They, in turn, were relieved on 4 January 1952 while a smaller team of seven, led by, built a secondary base on Petrel Island, some to the west in the Géologie Archipelago.
On the night of 23–24 January 1952 the Port Martin base was largely destroyed by a fire which burnt down its main building. There were no deaths nor injuries incurred but the base personnel were evacuated to Petrel Island, where they overwintered, and Port Martin abandoned.
Since 1952 the site has remained largely undisturbed. What remains in Port-Martin are the base's ancillary buildings, including a weather shelter and its coal and supply sheds, beneath a covering of snow. It represents an optimal site to design archeological methods and techniques in extreme climatic conditions. It is considered a valuable archaeological as well as a historic site and is protected under the Antarctic Treaty System as Antarctic Specially Protected Area (ASPA) No.166.[2] It has also been designated a Historic Site or Monument (HSM 46), following a proposal by France to the Antarctic Treaty Consultative Meeting.[3]