2 candidates are tracked for California Assembly District 16 on the November 3, 2026 ballot: Rebecca Bauer-Kahan and Joseph A. Rubay. Candidate information follows official Contra Costa County election filings; verify with the official election office linked below.
Rebecca Bauer-Kahan (Democratic) and Joseph A. Rubay (Republican) meet on the November 3 ballot; Rebecca Bauer-Kahan is the incumbent, per the Secretary of State's list. June 2 top-two primary result: Rebecca Bauer-Kahan (DEM) 65.6 percent and Joseph A. Rubay (REP) 30.6 percent advanced over Chirag Kathrani (NPP) 3.8 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.
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, Rebecca Bauer-Kahan, is on the ballot.
California › Contra Costa County › California Assembly District 16
Democratic Incumbent
Per the Assembly committee roster.
Rebecca Bauer-Kahan represents California Assembly District 16, covering Contra Costa County. She is an environmental attorney, per her campaign site.
Republican
Per the Contra Costa Herald.
Joseph A. Rubay is the Republican candidate for California Assembly District 16 on the November 3, 2026 ballot, per the Secretary of State's Certified List of Candidates (ballot designation: Businessman/Father). No campaign website was found as of September 7, 2026.
Who is running for California Assembly District 16 in 2026?
2 candidates are tracked for California Assembly District 16 on the November 3, 2026 ballot: Rebecca Bauer-Kahan and Joseph A. Rubay. Candidate information follows official Contra Costa County election filings; verify with the official election office linked below.
When is the California Assembly District 16 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 Contra Costa 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.
Candidate roster from official Contra Costa County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official California election office, or see the full Contra Costa County sample ballot and your exact ballot by address.
8 tracked races in Contra Costa County, California. Landed here from another county's search? Look up your own ballot below.