Message from Mark Church, Chief Elections Officer & Assessor-County Clerk-Recorder

Mark Church Welcome to the San Mateo County Elections website.

I am honored and privileged to serve as your Chief Elections Officer & Assessor-County Clerk-Recorder. As your Registrar of Voters, I am committed to ensuring that our office continues its tradition of excellence and operates at a maximum level of efficiency and productivity.

Please use this website for easy access to the information and services that our office provides to the citizens of San Mateo County. I hope you find it a useful resource for election information.


New 2022 Political Districts

Redistricting for U.S. Representative, State Senate, State Assembly, and San Mateo County Board of Supervisors has been completed.

Find out your new districts using our District/Precinct Lookup here. Instructions on how to use the lookup are below.

State Maps – visit the 2020 California Citizens Redistricting Commission

Board of Supervisor Maps – visit the County of San Mateo District Lines Advisory Commission

Find out more about the redistricting process here.