The Patrol Bureau is responsible for providing law enforcement and crime prevention services to the residents of the unincorporated area of Sonoma County. There are approximately 140 deputies assigned to our Patrol Bureau and patrol the larger portion of 1,604 square miles of land and the 63 miles of the Pacific shoreline that make up the County of Sonoma. Approximately 500,000 people live in Sonoma County with nearly a third residing in the unincorporated cities.
Deputy Sheriffs work an assigned shift, patrolling an assigned area performing law enforcement and crime prevention work. This includes serving criminal and civil warrants, making arrests, issuing citations and conducting preliminary criminal investigations. Other duties include the serving of civil process, performing transportation for the Detention Division, assisting the Investigation and the Court Security Bureaus.
Most deputies assigned to the Patrol Bureau operate out of the main office located in Santa Rosa. The remaining deputies are assigned to one of the two sub-stations that are located in Guerneville and Sonoma Valley. In addition three "resident deputies" are assigned along the Pacific Coastline. One sergeant is assigned to the Helicopter Unit and two deputies and a sergeant are in the Marine Unit.
We are proud of our Patrol Bureau and the high standard of professional service it provides to the residents of Sonoma County. The Sheriff's Office has divided the County into eight law enforcement zones.
Sonoma County Zone Map
Zone 1: River Zone 446.08 square miles. This zone is staffed from the Guerneville substation and covers the Sonoma Coast and unincorporated areas surrounding Guerneville. In addition to the deputies from the Guerneville substation, there are three resident deputies who patrol the coastal areas.
Zone 2: North Zone 534.63 square miles. This zone is staffed from the main office and includes the unincorporated areas surrounding Healdsburg, Cloverdale, and Windsor.
Zone 3: Local Zone 104 square miles. This zone is staffed from the main office and includes the unincorporated areas surrounding the city of Santa Rosa.
Zone 4: West Zone 65.05 square miles. This zone includes the unincorporated areas surrounding Sebastopol. This area is staffed from the main office.
Zone 5: South Zone 187.63 square miles. This zone is staffed from the main office and includes the unincorporated areas surrounding Petaluma, Rohnert Park, and Cotati.
Zone 6: Valley Zone 163.13 square miles. This zone is staffed from the Sonoma Valley substation.