This is a list of mammals of Massachusetts. It includes all mammals currently living in Massachusetts, whether resident or as migrants. For the most part, it does not include each mammal's specific habitat, but instead shows the mammal's range in the state and its abundance. For a look at these mammals' habitats, see List of mammals of Connecticut. This list does not include the American bison and caribou, which have been reported in the past, but were extirpated after European settlers came to the state. It also does not include the fox squirrel, which only occurs accidentally.