Krozet, Or Crozet, a group of four small islands in the Indian ocean, between Kerguelen and Prince Edward islands, of volcanic origin, and composed chiefly of large rocks. Possession island, the largest of the four, is 20 m. long and 10 m. broad, with three bays, of which America bay is most frequented by sealers, who subsist on albatross eggs and the flesh of the young albatross, on wild ducks, goats' flesh, and the tongue and flippers of the sea elephant. It contains some patches of land, and as the temperature is rarely very low, it is believed that potatoes and vegetables would thrive. Penguin or Inaccessible island, a mere rock, derives its names from its inaccessibility, and from the abundance of penguins. Pigs' island, the most western of the group, which is less desolate, was so named from the pigs left there in 1834, which have increased to such an extent that they overrun the whole island, and afford abundant food for the sailors. The most eastern, in lat. 47° S., lon. 48° E., is known as East island, and is about 1 m. in diameter and 4,000 ft. high, with precipices rising in some places perpendicularly from its shores.

The Krozet islands were selected in 1874 as an American and British station for the observation of the transit of Venus.