The Redwood District Council of Lumber and Sawmill Workers Collection consists of the office files of the Redwood District Council of Lumber and Sawmill Workers, an umbrella organization of industrially organized plywood, sawmill and logging local unions in Del Norte, Humboldt, and at one time, Lake, Mendocino and Trinity Counties. It was affiliated with the United Brotherhood of Carpenters and Joiners of America. At least 70 different locals were affiliated to the Council at different times in its history. It also contains the complete office records of five constituent local unions which had been stored at the Council building and five small and one substantial accessions of personal papers and memorabilia. These records document the mature phase of the lumber unions in Humboldt County.

The Redwood District Council, founded in October 1940, ceased to function in 1986. The California Northcoast Labor/Community Archives Project was formed to save the records and they were transferred to Cal Poly Humboldt in 1989. The Collection was organized and processed during 1990-91 with the help of a grant from the National Historical Publications & Records Commission. There is an extensive finding aid available in Special Collections and on the Online Archive of California.