The American marten (Martes americana) is a North American member of the Mustelidae family. Sometimes referred to as the Pine Marten, it should be noted that the term Pine Marten also is used to refer to a separate Martes species from Europe. It differs from the fisher (Martes pennanti) in that it is smaller in size, has a pelage which is usually brown with an irregularly shaped chest-patch that is lighter in colour.

Some sources believe that the population found in the western United States should be considered a distinct species and given the scientific name Martes caurina.

The marten lives in mature coniferous or mixed forests in Alaska and Canada, and south through the Rocky Mountains. Trapping and destruction of forest habitat have reduced its numbers, but it is still much more abundant than the larger fisher. The Newfoundland subspecies of this animal (Martes americana atrata) is considered to be endangered.