2025 Census government inventory

County of Solano

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

Census ID 100642 · Census county field: Solano · Functioning in the 2025 inventory

Names, roles & contact channels

Published local officials

5 source-linked entries for Solano 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.

Cassandra James

Supervisor, District 1

Source updated 2026-09-16

Government profile ↗Email: district1@solanocounty.govPublished phone: (707) 784-3261

View government sources (4)

John M. Vasquez

Supervisor, District 4Published term: 2002-11 – end not listed

Source updated 2026-09-16

Government profile ↗Email: jmvasquez@solanocounty.govPublished phone: (707) 784-6129

View government sources (3)

Mitch Mashburn

Supervisor, District 5

Source updated 2026-09-16

Government profile ↗

View government sources (3)

Monica Brown

Supervisor, District 2

Source updated 2026-09-16

Government profile ↗Email: mebrown@solanocounty.govPublished phone: (707) 784-3031

View government sources (3)

Wanda Williams

Supervisor, District 3

Source updated 2026-09-16

Government profile ↗

View government sources (3)

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: 100642
Record type: General-purpose government
Classification: County
Status: Functioning

2025 Census snapshot

Reported contact and location fields

Reported mailing address675 TEXAS ST, STE 6500 · FAIRFIELD, CA · 94533-6342

Reported contact roleCounty Administrator

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

Census county fieldSolano

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

Solano

View source page 25 ↗

Governing board and executive

County Supervisor — District 1Erin Hannigan

County Supervisor — District 2Monica Brown

County Supervisor — District 3Jim Spering

County Supervisor — District 4John M. Vasquez

County Supervisor — District 5Mitch Mashburn

Records and elections

Clerk of the BoardBirgitta E. Corsello

County Clerk-RecorderIra Rosenthal

Registrar of VotersTim Flanagan

Finance and property

AssessorMarc Tonnesen

Auditor-ControllerSimona Padilla-Scholtens

Treasurer/Tax CollectorCharles Lomeli

Public safety and justice

Chief Probation OfficerChristopher Hansen

District AttorneyKrishna Abrams

Fire ChiefGeoff Belyea

Public DefenderElena D'Agustino

Sheriff-CoronerTom Ferrara

Administration

County AdministratorBirgitta E. Corsello

County CounselDennis Bunting

Education and libraries

County LibrarianSuzanne Olawski

Superintendent of SchoolsLisette EstrellaHenderson

Judicial leadership

Presiding JudgeDonna Stashyn

Assistant Presiding JudgeE. Bradley Nelson

Other public officials

Behavioral HealthSandra Sinz

Chief Administrative OfficerBirgitta E. Corsello

Child Support Services DirectorPamela Posehn

Community Development DirectorBill Emlen

Emergency ServicesDon Ryan

Social Services DirectorJerry Huber

General Services Agency DirectorMegan M. Callahan

Human Resource DirectorMarc Fox

Information Technology DirectorTim Flanagan

Public Works Agency DirectorMatt Tuggle

Phone(707) 784-6100Address675 Texas St., Fairfield, CA 94533Jurisdiction websitehttps://www.solanocounty.com ↗

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 estimate449,2182023

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.

County of Solano

Published local officials

Cassandra James

John M. Vasquez

Mitch Mashburn

Monica Brown

Wanda Williams

Listed as functioning in 2025.

Reported contact and location fields

Current public officials reported by the jurisdiction

Solano

Governing board and executive

Records and elections

Finance and property

Public safety and justice

Administration

Education and libraries

Judicial leadership

Other public officials

Scale and parent relationship

What each source proves—and what it does not.

Established by the published records

Not established by these records

Related California entities