This list of mammals of Colorado includes every wild mammal species seen in the U.S. state of Colorado, based on the list published by the Colorado Division of Wildlife.It does not include species found only in captivity. Species in this list are grouped by order and then by family within each order. The common name for each species is followed by its binomial name. The following codes are used to designate some species: * EN - Species is listed as endangered by the IUCN. * NT - Species is listed as near threatened by the IUCN.