This collection contains records of cases heard in the County Court for Sonoma County, California, between 1850 and 1880. Includes record of civil and criminal cases heard in County Court, daily records of County Court operations, and records of cases on appeal.

This collection contains reporters' transcripts and related papers for cases brought before the Third District Court of Appeal between 1909 and 1922.

This collection contains selected court transcripts from case prosecuted by the Sonoma County District Attorney's Criminal Division.

This collection contains records reflect various aspects of the operations of the Sonoma County District Courts. These include: registers of actions in civil and criminal cases heard in the District Court, and fees paid; liens for state and county taxes; lists of defendents and plaintiffs; minutes of each court session, court actions, and rules of the court.

This collection contains records of the Sonoma County Municipal Court, under the jurisdiction of the Santa Rosa Judicial District, Sonoma County Central Judicial District and finally, Sonoma County Judicial District. Records include criminal and civil dockets, court trial minutes, etc.