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San Mateo County

County CA San Mateo All CA counties

Updated 1 month, 2 weeks ago

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County map and voting statistics

San Mateo County map

Early voting
Election Day only
Several places; select to zoom in

County outlines are U.S. Census reference boundaries. Select a place for its hours and directions, or use "Show on map" in the lists. Only locations with reviewed coordinates are mapped. On a phone, move the map with two fingers.

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Early voting numbers

November 3, 2026 election · Reported through October 27, 2026

Secondary source report

Reported ballots (available methods): 92,021

Secondary republication of election-office aggregate counts. The reporting date is the dated source snapshot, not a claim that every county reported at the same time. Registration-party, historical comparisons and forecasts are excluded. The displayed total includes reported mail ballots and any reported in-person ballots. Seventeen counties have unreported in-person counts; their totals include reported mail only, not an assertion of zero in-person voting. The publisher labels the figures as cast/accepted; these preliminary administrative counts are not certified election results.

Source: PollingSource · Checked October 29, 2026

This is a dated snapshot, not a live count. These preliminary participation totals may be revised. They do not show candidate results or predict an election outcome.

Check the official election office for updates

Voting information on file

Published sample ballots: 0
Published polling places: 3
Mapped polling places: 1

For the November 3, 2026 election. These count records published on this site. Zero means no published records here; it does not establish that none exist in the county. Early-voting reports above have their own dates.

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Voting precincts

Open a precinct for its numbered boundary, matched sample ballots, candidates and voting locations. Confirm your registered precinct with the election office.

San Mateo County · 279 precincts on file

2026 primary consolidated precincts (SRPREC) · California Statewide Database

Precinct 10001 Precinct 10003 Precinct 10007 Precinct 10008 Precinct 10010 Precinct 10012 Precinct 10015 Precinct 10017 Precinct 10019 Precinct 10021 Precinct 12001 Precinct 12003 Precinct 12005 Precinct 12006 Precinct 12007 Precinct 12013 Precinct 14001 Precinct 14004 Precinct 14006 Precinct 15001 Precinct 15003 Precinct 15006 Precinct 15008 Precinct 15012 Precinct 17001 Precinct 17004 Precinct 17101 Precinct 17202 Precinct 17203 Precinct 17802 Precinct 17803 Precinct 17804 Precinct 18001 Precinct 18004 Precinct 18006 Precinct 18009 Precinct 18010 Precinct 18012 Precinct 18015 Precinct 18017 Precinct 18019 Precinct 18020 Precinct 18033 Precinct 18035 Precinct 18072 Precinct 18075 Precinct 21001 Precinct 21002 Precinct 21007 Precinct 21008 Precinct 21013 Precinct 21035 Precinct 21047 Precinct 21062 Precinct 22001 Precinct 22002 Precinct 22007 Precinct 22008 Precinct 22010 Precinct 22011

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Your November 3 ballot

As of October 6, 2026

Tuesday, November 3, 2026.

The sample ballot for San Mateo County is not available here yet.

Races and candidates on the San Mateo County ballot (10)

Attorney General of California
Rob Bonta (Democratic), Michael E. Gates (Republican)
California Supreme Court Justice
Joshua Groban
California Supreme Court Justice
Kelli M. Evans
Controller of California
Malia M. Cohen (Democratic), Herb W Morgan (Republican)
Governor of California
Xavier Becerra (Democratic), Steve Hilton (Republican)
Insurance Commissioner of California
Ben Allen (Democratic), Jane Kim (Democratic)
Lieutenant Governor of California
Fiona Ma (Democratic), Gloria Romero (Republican)
Secretary of State of California
Don P. Wagner (Republican), Shirley Weber (Democratic)
Superintendent of Public Instruction of California
Richard Barrera, Sonja Shaw
Treasurer of California
Jennifer Hawks (Republican), Eleni Kounalakis (Democratic)

Where to vote

As of October 6, 2026

San Mateo County uses countywide vote centers: registered San Mateo County voters may vote at any location listed for that county.

Early voting · Oct 5 – Nov 2

Assessor-County Clerk-Recorder’s Office

555 County Center, 1st Floor, Redwood City, CA

Not shown on the map; see address
Get directions

Mon, Oct 5 – Fri, Oct 9
9:00 a.m. – 5:00 p.m.
Mon, Oct 12 – Fri, Oct 16
9:00 a.m. – 5:00 p.m.
Mon, Oct 19 – Fri, Oct 23
9:00 a.m. – 5:00 p.m.
Mon, Oct 26 – Fri, Oct 30
9:00 a.m. – 5:00 p.m.
Mon, Nov 2
9:00 a.m. – 5:00 p.m.
Registration & Elections Division

40 Tower Road, San Mateo, CA
Get directions

Mon, Oct 5 – Fri, Oct 9
9:00 a.m. – 5:00 p.m.
Mon, Oct 12 – Fri, Oct 16
9:00 a.m. – 5:00 p.m.
Mon, Oct 19 – Fri, Oct 23
9:00 a.m. – 5:00 p.m.
Mon, Oct 26 – Fri, Oct 30
9:00 a.m. – 5:00 p.m.
Mon, Nov 2
9:00 a.m. – 5:00 p.m.
South San Francisco Public Library

901 Civic Campus Way, South San Francisco, CA

Not shown on the map; see address
Get directions

Mon, Oct 5 – Fri, Oct 9
9:00 a.m. – 5:00 p.m.
Mon, Oct 12 – Fri, Oct 16
9:00 a.m. – 5:00 p.m.
Mon, Oct 19 – Fri, Oct 23
9:00 a.m. – 5:00 p.m.
Mon, Oct 26 – Fri, Oct 30
9:00 a.m. – 5:00 p.m.
Mon, Nov 2
9:00 a.m. – 5:00 p.m.

Election Day · Tuesday, November 3 · 7:00 a.m. – 8:00 p.m.

Assessor-County Clerk-Recorder’s Office
555 County Center, 1st Floor, Redwood City
Not shown on the map; see address
Get directions
Registration & Elections Division
40 Tower Road, San Mateo
Get directions
South San Francisco Public Library
901 Civic Campus Way, South San Francisco
Not shown on the map; see address
Get directions

Confirm with your county elections office. Locations and hours can change. This summary may be incomplete; the county's official list is the authority. Polling location source

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