This collection contains official records created or commissioned by the Sonoma County Board of Supervisors, including records of special districts in Sonoma County. Some records jointly created by the Sonoma County Administrator's Office.

This collection contains official records and reports of the Sonoma County Superintendent of Schools and the Sonoma County Board of Education, including records of the Board of Examination, and the Trustees of Common Schools. Includes record primarily concerning matters such as teacher registrations, certification, training, student examination results and diplomas, etc. Also includes meeting minutes.

This collection contains records and related materials from the Sonoma County Superintendent of Schools includes financial documentation pertaining to the operations of the schools within the district, as well as data relating to the geographic division of school boundaries etc. The "Scrapbooks" include newspaper clippings concerning Sonoma County schools for the periods covered.