San Mateo County

Population: 726,353
Established: 1856     Seated:  
Settled on Land: 04/06/2025

County Offices (interim)

Commissioner: Office Filled
Commissioner: Office Filled
Clerk: Office Filled
Justice: Office Filled
Court Clerk: Office Filled
Sheriff: Office Filled

Note: Although interim offices may be currently filled, we still need your participation. Please visit our Registration Page

Last updated on October 1, 2026