Trinity County California (Historic Districts) has 4 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Weaverville Historic District, De-No-To Cultural District, Helena Historic District, Lewiston Historic District.
Prehistoric cultural affiliation(s) include Hupa and Kurak dating back to 500.
The famous person Olney Phillips is associated with one of more of the Trinity County historic places. Prominent architectural styles found in Trinity Country are Greek Revival.