The source record
A functioning Census entity.
The Census ACTIVE field is Y for this record.
- Census ID
- 161117
- Record type
- General-purpose government
- Classification
- County
- Status
- Functioning
U.S. Census government inventory · ID 161117
County of Sonoma.
General-purpose government in California · Census county area: Sonoma.
General-purpose governmentCountyFunctioning
Published contact fields
Contact and location
Mailing address575 ADMINISTRATION DR · SANTA ROSA, CA · 95403-2823
Census contact/title fieldAdministrator
County areaSonoma
Reported websiteOpen reported website ↗
Websites are primarily self-reported and received only limited Census Bureau quality control. County area can mean the area most served or the headquarters county when boundaries cross counties.
Official 2026 California roster
Current public officials reported by the jurisdiction
COUNTY DIRECTORY
View source page 25 ↗Sonoma
Governing board and executive
County Supervisor — District 1Rebecca Hermosillo
County Supervisor — District 2David Rabbitt
County Supervisor — District 3Chris Coursey
County Supervisor — District 4James Gore
County Supervisor — District 5Lynda Hopkins
Records and elections
Finance and property
Public safety and justice
Chief Probation OfficerVanessa Fuchs
District AttorneyCarla Rodriguez
Fire ChiefRon Busch
Public DefenderBrian Morris
Sheriff-CoronerEddie Engram
Administration
County AdministratorDavid Guhin
County CounselJoshua Myers
Education and libraries
County LibrarianNikolaos Pelekis
Superintendent of SchoolsDr. Aime Carter
Judicial leadership
Presiding JudgeHon. Christopher Honigsberg
Assistant Presiding JudgeHon. Mark Urioste
Other public officials
Chief Administrative OfficerDavid Guhin
Behavioral HealthNolan Sullivan
Child Support Services DirectorGigi Mertle
Community Development DirectorMichelle Whitman
Developmental Services DirectorNolan Sullivan
Social Services DirectorAngela Struckmann
Emergency Services DirectorJeff Duvall
General Services Agency DirectorJohannes Hoevertsz
Health Care Services DirectorNolan Sullivan
Human Resource DirectorJanell Crane
Information Technology DirectorDan Fruchey
Public Works Agency DirectorJohannes Hoevertsz
Phone(707) 565-2431Address575 Administration Drive, Room 104A, Santa Rosa, CA 95403Jurisdiction websitehttps://sonomacounty.gov/ ↗
The CalRoster labels county entries elected and appointed officials and does not publish a selection method for each individual role. Election.org therefore does not infer elected or appointed status from the title alone. The Secretary of State notes that each local jurisdiction supplies its own roster data; this is a dated public record, not a live officeholder feed.
Published context
Scale and parent relationship
Population estimate481,8122023
Evidence boundary
What each source proves—and what it does not.
Established by the published records
- The entity or system appears in the 2025 Census listing.
- Its Census category, identifier, and functioning/dormant field.
- Only the location, function, population, enrollment, and contact fields actually published.
- The separate 2026 CalRoster reports the public-official roles and holder text shown above.
Not established by these records
- Whether each governing or administrative role is elected, appointed, or mixed.
- The exact geographic service boundary or that a reported website remains current.