This is a list of the mammal species recorded in Saint Martin. Of the mammals of Saint Martin, only bats are native. Apart from bats, many oceanic mammals, exotic mammals and domesticated species can be found within and around the island. Native rodents, such as the blunt-toothed giant hutia and oryzomyines, are known to extirpated from the island due to the impact of humans, where a few oryzomyines can be found around archeological sites.[1]
The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:
| EX | Extinct | No reasonable doubt that the last individual has died. | |
| EW | Extinct in the wild | Known only to survive in captivity or as a naturalized populations well outside its previous range. | |
| CR | Critically endangered | The species is in imminent risk of extinction in the wild. | |
| EN | Endangered | The species is facing an extremely high risk of extinction in the wild. | |
| VU | Vulnerable | The species is facing a high risk of extinction in the wild. | |
| NT | Near threatened | The species does not meet any of the criteria that would categorise it as risking extinction but it is likely to do so in the future. | |
| LC | Least concern | There are no current identifiable risks to the species. | |
| DD | Data deficient | There is inadequate information to make an assessment of the risks to this species. |
Some species were assessed using an earlier set of criteria. Species assessed using this system have the following instead of near threatened and least concern categories:
| LR/cd | Lower risk/conservation dependent | Species which were the focus of conservation programmes and may have moved into a higher risk category if that programme was discontinued. | |
| LR/nt | Lower risk/near threatened | Species which are close to being classified as vulnerable but are not the subject of conservation programmes. | |
| LR/lc | Lower risk/least concern | Species for which there are no identifiable risks. |
----Sirenia is an order of fully aquatic, herbivorous mammals that inhabit rivers, estuaries, coastal marine waters, swamps, and marine wetlands. All four species are endangered.
----Bats comprised 20% of all mammals described in the world and they are the only true-fliers among mammali. Saint Martin is home for seven bat species.
----The order Cetacea which includes whales, dolphins and porpoises, are the mammals most fully adapted to aquatic life which enable them to survive like fish in the water. They are armored with thick blubber, limbs evolved as fins and also with tail fin.
----Well over 250 species of carnivorans, they fill up the top ranks of any food web, and helps to control the population of herbivores.
----Rodents are the most successful mammals in the world, comprising more than 40% of all described mammal species. They are economically important animals, where most of them are pests and invasive species in human habitations.