The Chimariko (Chimariko language: cʼʸˈimar, tʼʸimar, čimar, čʼimar or ǯimar - ″person / Indian″) are an Indigenous people of California, who originally lived in a narrow, 20-mile section of canyon on the Trinity River in Trinity County in northwestern California.

[3] Non-native fur trappers first entered the Chimariko's territory in 1820, followed by miners and settlers in the 1850s.

One of the major issues involved the disruption of the salmon population that was the main food source of the Chimariko.

It is extensively documented in unpublished fieldnotes which John Peabody Harrington obtained from the last speaker, Sally Noble, in the 1920s.

Alfred L. Kroeber proposed that the 1770 population of the Chimariko, together with the New River, Konomihu, and Okwanuchu groups of the Shasta, had been about 1,000.