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Government directory/California
2025 Census government inventory

County of San Mateo

General-purpose government in California. Browse the source-reported information below.

Census ID 123088 · Census county field: San Mateo · Functioning in the 2025 inventory
Names, roles & contact channels

Published local officials

6 source-linked entries for San Mateo County, compiled by CivicPatch. Each entry keeps the source's update date and government links.

A dated roster, not a live verification. We matched this jurisdiction to its exact Census identifier. Continued service, complete seat coverage, and your individual district representative have not been independently verified. Check the linked government source before contacting an official.

David Canepa

  • Supervisor, District 5Published term: 2017 – end not listed

Source updated

Government profile ↗Email: dcanepa@smcgov.orgPublished phone: (650) 363-4000Published phone: (650) 363-4572
View government sources (2)

Jackie Speier

  • Supervisor, District 1

Source updated

Government profile ↗Email: smcsupspeier@smcgov.orgPublished phone: (650) 363-4000Published phone: (650) 363-4571
View government sources (2)

Lisa Gauthier

  • Supervisor, District 4

Source updated

Government profile ↗Email: smc_supgauthier@smcgov.orgPublished phone: (650) 363-4000Published phone: (650) 363-4570
View government sources (2)

Noelia Corzo

  • Council President, District 2Published term: 2022 – end not listed

Source updated

Government profile ↗Government profile ↗Email: ncorzo@smcgov.orgPublished phone: (650) 363-4000Published phone: (650) 363-4568
View government sources (3)

Ray Mueller

  • Council Vice President, District 3Published term: 2022 – end not listed

Source updated

Government profile ↗Government profile ↗Published phone: (650) 363-4000
View government sources (2)

Sandie Arnott

  • Treasurer

Source updated

Government profile ↗Email: treasmaster@smcgov.orgPublished phone: (650) 363-4580
View government sources (1)
Audit the exact CivicPatch snapshot ↗Data license ↗Imported 2026-10-02. Import date is not a new source-verification date.
The source record

Listed as functioning in 2025.

The Census ACTIVE field is Y for this record.

Census ID
123088
Record type
General-purpose government
Classification
County
Status
Functioning
2025 Census snapshot

Reported contact and location fields

Reported mailing address400 COUNTY CTR · REDWOOD CITY, CA · 94063-1668
Reported contact roleDeputy County Manager

A role label, not a verified person’s name.

Census county fieldSan Mateo
Reported websiteOpen listed website ↗

These are inventory fields, not newly verified office contacts. A county field or mailing address does not establish the exact service boundary.

Official 2026 California roster

Current public officials reported by the jurisdiction

Open CalRoster source ↗
COUNTY DIRECTORY

San Mateo

View source page 21 ↗

Governing board and executive

County Supervisor — District 1Jackie Speier
County Supervisor — District 2Noelia Corzo
County Supervisor — District 3Ray Mueller
County Supervisor — District 4Lisa Gauthier
County Supervisor — District 5David Canepa

Records and elections

Clerk of the BoardMike Callagy
County Clerk-RecorderMark Church
Registrar of VotersMark Church

Finance and property

AssessorMark Church
Auditor-ControllerJuan Raigoza
Treasurer/Tax CollectorSandie Arnott

Public safety and justice

Chief Probation OfficerJohn Keene
District AttorneySteve Wagstaffe
Fire ChiefNate Armstrong
Sheriff-CoronerChristina Corpus

Administration

County CounselJohn Niblbelin

Education and libraries

County LibrarianAnne-Marie Despain
Superintendent of SchoolsNancy Magee

Judicial leadership

Presiding JudgeStephanie G. Garratt
Assistant Presiding JudgeRachel Holt

Other public officials

Behavioral HealthColleen Chawla
Child Support Services DirectorKim Cagno
Community Development DirectorEmma Gonzalez
Emergency ServicesShruti Dhapodkar
Health Care Services DirectorColleen Chawla
Human Resource DirectorRocio Kiryczun
Information Technology DirectorMichael Wentworth
Public Works Agency DirectorAnn Stillman
Phone(650) 363-4123Address400 County Center, Redwood City, CA 94063Jurisdiction websitehttps://www.smcgov.org/ ↗

The CalRoster labels county entries elected and appointed officials and does not publish a selection method for each individual role. The source compiler 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 estimate726,3532023

About these sources and their limits
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.
Nearby in the government graph

Related California entities

All California records →
GENERAL-PURPOSE GOVERNMENTCity of BelmontSan Mateo county areaGENERAL-PURPOSE GOVERNMENTCity of BrisbaneSan Mateo county areaGENERAL-PURPOSE GOVERNMENTCity of BurlingameSan Mateo county areaGENERAL-PURPOSE GOVERNMENTCity of Daly CitySan Mateo county areaGENERAL-PURPOSE GOVERNMENTCity of East Palo AltoSan Mateo county areaGENERAL-PURPOSE GOVERNMENTCity of Foster CitySan Mateo county area
Reading guideLocal government
How to interpret this record

County of San Mateo, CA — 2026 Public Officials

Local government is a collection of institutions with different boundaries and responsibilities. A municipality, school district and special district can serve overlapping places without being the same organization.

Map the institution, not just the city name

A mailing address can sit inside several governmental boundaries. A county, municipality, school district and special-purpose body may each make different decisions. The Census of Governments provides a structured way to identify governmental units; a unit’s existence does not automatically tell you who currently holds each seat or when its next election occurs.

Distinguish a directory from a live roster

An institutional directory describes organizations. An official roster describes people connected to offices at a stated time. These sources may be published by different agencies on different schedules. Electionpedia links the institution and the person when the evidence supports a match, while preserving the distinction between the source’s reference year and the latest date the file was checked.

Read the full local government guide →