Chimacum, or Chemakum, were a Native American group that once lived on western Washington state's Olympic Peninsula. The Chimacum spoke a language very similar to the Quileute language, which is one of a kind language. This is due to the fact that the Chimacum were wiped out by Chief Seattle and the Suquamish people in warfare during the 1860s. The Chimacum language, like the language of the Quileutes, was one of only a few known languages to not have any nasal sounds (m, n).

See also: Quileute