The Ballot Brief
San Mateo County, California

California Assembly District 19

2 candidates are tracked for California Assembly District 19 on the November 3, 2026 ballot: Catherine Stefani and Philip Louis Wing. Candidate information follows official San Mateo County election filings; verify with the official election office linked below.

About this race

Catherine Stefani (Democratic) and Philip Louis Wing (Republican) meet on the November 3 ballot; Catherine Stefani is the incumbent, per the Secretary of State's list. June 2 top-two primary result: Catherine Stefani (DEM) 83.0 percent and Philip Louis Wing (REP) 17.0 percent advanced, per the Secretary of State's Statement of Vote. California's top-two primary decides who prints in November; the field is the Secretary of State's Certified List of Candidates for the General Election (August 27, 2026). This seat is elected by district; only the district covering your address appears on your ballot.

What this office does

State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.

This race. Elected by district: only voters who live in the district see this race on their ballot. The sitting officeholder, Catherine Stefani, is on the ballot.

California › San Mateo County › California Assembly District 19

Catherine Stefani

Catherine Stefani

Democratic Incumbent

Top priorities
  • Public safety measures addressing gun violence and support for crime victims.
  • Streamlining affordable housing construction and supporting housing near transit.
  • Increasing funding for public schools and teachers.

Per the campaign site.

Biography

Catherine Stefani represents California's 19th Assembly District, covering the western neighborhoods of San Francisco and northern San Mateo County, per her official Assembly biography. She previously served as a San Francisco County Supervisor and a Contra Costa County prosecutor, and founded the San Francisco chapter of Moms Demand Action. She is running for reelection as the Democratic candidate.

Philip Louis Wing

Republican

Biography

Philip Louis Wing is a candidate for the 19th Assembly District. His ballot designation is retired financial advisor, per the California Secretary of State's certified list of candidates for the November 3, 2026 general election. No campaign website was found as of September 27, 2026.

Next on your ballotCalifornia Assembly District 21

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Questions about this race

Who is running for California Assembly District 19 in 2026?

2 candidates are tracked for California Assembly District 19 on the November 3, 2026 ballot: Catherine Stefani and Philip Louis Wing. Candidate information follows official San Mateo County election filings; verify with the official election office linked below.

When is the California Assembly District 19 election in California?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for California are on the California election hub at theballotbrief.com.

How do I see my exact San Mateo County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official San Mateo County and state election office filings. Bios and priorities carry their attribution inline.

Cross-check with the official California election office, or see the full San Mateo County sample ballot and your exact ballot by address.

The rest of your San Mateo County ballot

3 tracked races in San Mateo County, California. Landed here from another county's search? Look up your own ballot below.

Also on your ballot
California Assembly District 23See all 3 San Mateo County races
Candidate profiles
Catherine Stefani, full profilePhilip Louis Wing, full profileOfficial California election office