Prehistoric cultural affiliation(s) include Yurok, Chilvla, Redwood Creek, Chilula, Hupa and Kurak dating back to 999 BC.
Some of the country's most noteable architects helped create the Humboldt County places including Thomas J. Frost, California Division of Architecture, George Fairfield and William S. Fitzell. Prominent architectural styles found in Humboldt Country are Queen Anne, Classical Revival and Greek Revival.