Port-aux-Français is the main settlement of the Kerguelen Islands, and French Southern and Antarctic Lands, in the south Indian Ocean.

The Kerguelen Islands, also known as the Desolation Islands, are a group of islands in the sub-Antarctic constituting one of the two exposed parts of the Kerguelen Plateau, a large igneous province mostly submerged in the southern Indian Ocean. They are among the most isolated places on Earth, located more than 3,300 kilometres from Madagascar. The islands, along with Adélie Land, the Crozet Islands, Amsterdam and Saint Paul islands, and France's Scattered Islands in the Indian Ocean, are part of the French Southern and Antarctic Lands and are administered as a separate district.