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San Mateo County

765,436 Population
445,212 Voters
Countywide District 1 District 2 District 3 District 4 District 5
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San Mateo County

765,436 Population
445,212 Voters
Countywide District 1 District 2 District 3 District 4 District 5

Unlock complete local candidate data Candidates, past results, and upcoming races—skip the county portals.

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2026 Candidates

San Mateo
8 offices, 10 candidates
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This candidate list is compiled from certified candidate filings published by the county elections office. While we strive for accuracy, always confirm with your local county clerk or registrar of voters for the official list.

Coroner (Countywide)

1 candidate
Robert J Foucrault Coroner, County of San Mateo

Treasurer-Tax Collector (Countywide)

1 candidate
Sandie Arnott Treasurer-Tax Collector

County Superintendent of Schools (Countywide)

2 candidates
Héctor Camacho Teacher / Executive Director
Raised ~$XXX,XXX
Spent ~$XX,XXX
Cash ~$XX,XXX
Debt ~$XXX
Through Apr 18, 2026
Committee Hector Camacho for County Superintendent 2026
Chelsea Bonini Teacher / Attorney / Trustee
Raised ~$XX,XXX
Spent ~$XX,XXX
Cash ~$X,XXX
Debt ~$XXX
Through Apr 18, 2026
Committee Chelsea Bonini for San Mateo County Superintendent of Schools 2026

Assessor-County Clerk-Recorder & Chief Elections Officer (Countywide)

1 candidate
David Canepa San Mateo County Supervisor
Raised ~$XXX,XXX
Spent ~$XX,XXX
Cash ~$XX,XXX
Debt ~$XXX
Through Apr 18, 2026
Committee Canepa for Assessor-County Clerk-Recorder 2026

Assessor-County Clerk-Recorder (Countywide)

1 candidate
Jim Irizarry Assistant Assessor County of San Mateo
Raised ~$XXX,XXX
Spent ~$XX,XXX
Cash ~$XXX,XXX
Debt ~$X,XXX
Through Apr 18, 2026
Committee Elect Jim Irizarry Assessor-County Clerk-Recorder 2026

County Controller (Countywide)

1 candidate
Juan Raigoza San Mateo County Controller
Raised ~$XX,XXX
Spent ~$XX,XXX
Cash ~$XX,XXX
Debt ~$XX,XXX
Through Apr 18, 2026
Committee Juan Raigoza for Controller 2026

Board of Supervisors - District 2

View District 1 candidate
Noelia Corzo Incumbent
Raised ~$XX,XXX
Spent ~$XX,XXX
Cash ~$XX,XXX
Debt ~$XXX
Through Apr 18, 2026
Committee Re-Elect Noelia Corzo for San Mateo County Supervisor 2026

Board of Supervisors - District 3

View District 2 candidates
Ray Mueller San Mateo County Supervisor / Educator
Raised ~$XX,XXX
Spent ~$XX,XXX
Cash ~$XX,XXX
Debt ~$XXX
Through Apr 18, 2026
Committee Ray Mueller for Supervisor 2026
Joaquin Jimenez Community Organizer
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