California State Assembly · 2021 Lines

Assembly District 23

Marc Berman (Democratic), re-elected in 2026

Who represents this district

Marc Berman (Democratic) was re-elected on November 3, 2026.

Open seat in 2028: the officeholder is term-limited and cannot run for this seat again.

292,625Registered voters

D +38.7Registration margin

Incumbent re-elected, Nov 2026Seat status

Counties and cities

Counties: San Mateo (partial), Santa Clara (partial)

Principal cities and communities:

Palo AltoMenlo ParkMountain ViewRedwood CityHalf Moon BayPacificaAthertonLos Altos

Voter registration

Registered voters	Democratic	Republican	Other
292,625	52.9%	14.2%	33%

Secretary of State Report of Registration, September 4, 2026. Other covers every registrant not registered Democratic or Republican.

Capitol Daybook Research

Research access

The full district files are available to Capitol Daybook Research clients. A Capitol Daybook subscription does not include research access.

The full district file carries registration trends across the recent Secretary of State reports, 2024 presidential results computed on the current district lines, 2026 campaign finance totals with independent expenditures, and CSV downloads of the district tables.

Request Access About the Library Client Log In

Registration: California Secretary of State, Report of Registration, September 4, 2026. 2026 results: Associated Press calls for U.S. House races; state legislative results compiled from Ballotpedia and JoinCalifornia against semi-official returns. District lines: congressional districts are the Proposition 50 (AB 604) map; State Senate and Assembly districts are the 2021 Citizens Redistricting Commission maps.