The cacomistle (; Bassariscus sumichrasti), also spelled cacomixtle, is a primarily nocturnal, arboreal, omnivorous member of the carnivoran family Procyonidae (coatis, kinkajous and raccoons). Depending on the location, its preferred habitats are humid and tropical evergreen jungle and montane cloud forests; seasonally, it may venture into drier, deciduous forests.

Although its total population is listed as being of "least concern" (i.e., stable), the cacomistle is still a highly cryptic, secretive animal, and generally an uncommon sight throughout much of its range (from southern México to western Panamá); this fact is especially true in Costa Rica, where it inhabits only a very small area. Additionally, the species is completely dependent on trees and dense vegetation for habitat, making it particularly susceptible to deforestation.

The name cacomistle comes from the Nahuatl language (tlahcomiztli) and means "half-cat" or "half-puma"; the same name is also given, by some, to the North American Bassariscus astutus, more commonly known as the ringtail (or, semi-inaccurately, ringtail 'cat'). This "sister species" of the cacomistle inhabits a much more northerly and less tropical range, from arid Northern Mexico into the Southwestern United States.

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