Business Hours: Monday through Friday, 8 a.m. to 5 p.m., excluding Holidays
Limited Services Available

Effective October 1, 2020, the County Clerk-Recorder Division will reopen to the public on an appointment only basis.

The Registration & Elections Division is open to the public.

The Assessor Division is not open to the public. Appraisal Services staff will be working remotely, and essential services will continue to be available on a limited basis. The public is encouraged to utilize the website, phone systems, emails and online Live Chat to obtain information and services.

Detailed information on operating hours, contact phone numbers and email addresses may be found on the page for each Division as follows:


Registration & Elections

All services provided by the Registration & Elections Division remain available. Voters can mail their voter registration card or register online, and are able to make an appointment if they wish to submit a petition. Voters who require direct assistance may contact the Elections Division by phone or text at 650.312.5222, email at or utilize the Elections Live Chat feature.

The Registration & Elections Division at 40 Tower Road, San Mateo, CA, will serve as the sole Vote Center for the May 4, 2021 Portola Valley School District Special Mail Ballot Election.

Hours of operation for voting beginning on April 5 are as follows: 

  • Monday, April 5, 2021, through Monday, May 3, 2021
    8 a.m. to 5 p.m. (Weekdays) 
  • Tuesday, May 4, 2021 (Election Day) 
    7 a.m. to 8 p.m. 

The Vote Center at 40 Tower Road, San Mateo, will follow COVID-19 safety procedures. For more information on the May 4, 2021 Portola Valley School District Special Mail Ballot Election, please call 650.312.5222, visit or follow us on Twitter and Instagram @smcvote.



Assessor-County Clerk-Recorder

Registration & Elections


City or Town Hall Locations in San Mateo County
Addresses, Phone Numbers and Websites

South San Francisco
City Hall
400 Grand Avenue, South San Francisco, CA 94083

Town Hall
2955 Woodside Road, Woodside, CA 94062