Location: Southeast

The City of Santa Rosa (Bennett Valley, Rincon Valley and the community of Oakmont), City of Sonoma and the adjacent unincorporated communities of Kenwood, Agua Caliente, Glen Ellen, El Verano, Boyes Hot Springs, Schellville and Vineburg.

Location: Southwest

The City of Petaluma, City of Cotati, a portion of Rohnert Park and the unincorporated communities of Penngrove, Two Rock and Bloomfield.

Location: Central

Most of central Santa Rosa and the City of Rohnert Park (east of Highway 101).

Location: Northeast

Northwest Santa Rosa (Fulton and Larkfield-Wikiup area), Town of Windsor, City of Healdsburg, community of Geyserville and the City of Cloverdale.

Northwest Sonoma County: Sonoma County coast, lower Russian River area, Sebastopol and the west and southwest Santa Rosa areas (extending into Highway 101).

The Department of Child Support Services (DCSS) establishes and enforces court orders for child support, paternity and medical coverage; Assists with locating the parents; Collects and distributes support payments; Maintains accounting records of all payments made and past due; Modifies court orders when appropriate; and provides legal and case management services to ensure child and medical support orders are maintained.

The County Clerk-Recorder Division of the Sonoma County Clerk-Recorder-Assessor Department has a variety of duties, including issuing marriage licenses, filing fictitious business name statements, processing notary bonds, handling environmental documents, performing civil marriage ceremonies, recording documents including deeds, maps and liens as well as maintaining cross-reference indexes for these documents. The recorded documents are open for public inspection.

The Department of Emergency Management is responsible for the planning, coordination of response, recovery, and mitigation activities related to county-wide emergencies and disasters; serving as the primary coordination point for emergency management's communication flow between the Federal, State, and local levels; developing emergency operation plans for the county, cities, and districts; conducting training and educational outreach programs related to emergency preparedness; and sponsoring emergency management training.

Family, Youth and Children's Services helps keep Sonoma County children and teens safe through foster care, child protection services (CPS) and social services support for families. Staff investigate reports of child abuse, neglect or abandonment. Children may stay temporarily at the Valley of the Moon Children's Home. Staff train mandated reporters about child abuse prevention and reporting. Santa Rosa, California.

IOLERO’s mission is to strengthen the relationship between the Sheriff’s Office and the community it serves through outreach and the promotion of greater transparency of law enforcement operations.

The Office of Recovery and Resiliency was established to develop a post-fire recovery and resiliency plan in December 2017, as mandated by the Sonoma County Board of Supervisors.

Permit Sonoma is Sonoma County's consolidated land use planning and development permitting agency. Virtually any land development or construction that takes place in the unincorporated area of Sonoma County (outside the nine incorporated cities) is reviewed, permitted, and inspected by Permit Sonoma.

The Registrar of Voters Office is a division of the County Clerk-Recorder-Assessor’s Department, under the direction of an elected County Clerk. The Registrar of Voters Office performs a range of election-related duties, in addition to other public services that increase citizen participation and education.