This is a list of the mammal species recorded in South Georgia and the South Sandwich Islands. There are thirteen mammal species in South Georgia and the South Sandwich Islands, of which one is endangered.
The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:
Order: Cetacea (whales).
The order Cetacea includes whales, dolphins and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
Order: Carnivora (carnivorans).
There are over 260 species of carnivorans, the majority of which feed primarily on meat. They have a characteristic skull shape and dentition. 
Order: Artiodactyla (even-toed ungulates).
The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
Notes.
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