San Mateo County Sample Ballot & Voter Guide 2026
6 candidates are on the November 3, 2026 ballot across 3 San Mateo County races, led by the California Assembly District 19 contest.
By address
These seats are elected by district; only the district covering your address is on your ballot.
San Mateo County is split across 3 California Assembly districts.
Find your districts by addressCalifornia Assembly: 3 districtsDistricts 19, 21, 23
California Assembly District 19Catherine Stefani (D) · Philip Louis Wing (R)
Catherine Stefani Democratic Incumbent
- 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.
About Catherine Stefani
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
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.
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.
Full race pageCalifornia Assembly District 21Diane Papan (D) · Jabra J Muhawieh (R)
Diane Papan Democratic Incumbent
- Investing in year-round wildfire prevention.
- Amending the State Constitution to protect reproductive freedom, including access to contraceptives.
- Expanding use of recycled and reclaimed water to address drought.
Per the campaign site.
About Diane Papan
Diane Papan was first elected to the Assembly in November 2022 and represents the 21st District, covering the Bayside of San Mateo County from Brisbane to East Palo Alto, per her official Assembly biography. She previously served as mayor and a city councilmember for San Mateo. She is running for reelection as the Democratic candidate.
Jabra J Muhawieh Republican
- Government that is accountable to taxpayers and focused on results
- Creating opportunities for working families, homeowners and small businesses
Per the campaign site.
About Jabra J Muhawieh
Jabra Muhawieh is a business owner, Enrolled Agent, tax professional and California real estate broker based in Millbrae, per his campaign site. He operates his family's tax preparation firm and a grocery and liquor business that has served San Francisco since 1906. He is the Republican candidate for California Assembly District 21.
Diane Papan (Democratic) and Jabra J Muhawieh (Republican) meet on the November 3 ballot; Diane Papan is the incumbent, per the Secretary of State's list. June 2 top-two primary result: Diane Papan (DEM) 78.7 percent and Jabra J Muhawieh (REP) 21.3 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.
Full race pageCalifornia Assembly District 23Marc Berman (D) · David G. Johnson (R)
Marc Berman Democratic Incumbent
- Higher education policy
- Business and professional regulation, cybersecurity and electric-vehicle infrastructure
Per the California State Assembly official roster.
About Marc Berman
Marc Berman represents California's 23rd Assembly District, covering San Mateo and Santa Clara counties. He chairs the Business and Professions Committee and the Select Committee on the Master Plan for Higher Education in California, and also serves on the Elections, Governmental Organization, and Insurance committees, per the Assembly's official roster.
David G. Johnson Republican
- Opposing new taxes and regulations
- Parental rights and school choice
Per the San Mateo Daily Journal.
About David G. Johnson
David G. Johnson is the Republican candidate for California Assembly District 23 on the November 3, 2026 ballot, per the Secretary of State's Certified List of Candidates (ballot designation: Small Business Owner). No campaign website was found as of September 7, 2026.
Marc Berman (Democratic) and David G. Johnson (Republican) meet on the November 3 ballot; Marc Berman is the incumbent, per the Secretary of State's list. June 2 top-two primary result: Marc Berman (DEM) 77.3 percent and David G. Johnson (REP) 14.6 percent advanced over Rick Giorgetti (REP) 8.0 percent, 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.
Full race pageSee your full ballot
Voting info and more
Voting info and more
Verify your ballot with the official election office.
Cross-check every race and candidate with the official election office. Official sources are the final word.
California's June 2 top-two primary sent the two leading vote-getters in every race to the November 3 ballot regardless of party (a same-party November contest is common); the Secretary of State certified the November field on August 27, 2026. County offices that reached a majority in June were decided then; only November runoffs and local measures remain on county ballots.
Who is on the ballot in San Mateo County, California on November 3, 2026?
San Mateo County sample ballot 2026: see where the california assembly candidates stand on schools, housing and affordability and public safety. Every candidate profile on this page names the official filing or campaign source it came from.
When is the 2026 general election in California?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for California are listed on the California election hub. California election hub →
How do I see my exact San Mateo County ballot?
Enter your ZIP code in the lookup for the statewide and congressional races on every ballot in the county, or a full street address to add the county, city and district contests for that location. Look up your ballot →