California's 23rd State Assembly district

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California's 23rd State Assembly district is one of 80 CaliforniaState Assembly districts. It is currently represented by DemocratMarc Berman of Menlo Park.

District profile

As of the 2020 redistricting (which took effect as of the 2022 elections), the district includes Silicon Valley communities, containing multiple notable high-tech companies and parts of the Caltrain corridor, as well as smaller, rural districts along the coast.

Election results from statewide races

Due to redistricting, the 23rd district has been moved around different parts of the state.

YearOfficeResults
2022GovernorNewsom 74.7 – 25.3%
SenatorPadilla 76.2 – 23.8%
2021RecallYes Yes 56.5 – 43.5%
2020[3]PresidentTrump 50.2 – 47.8%
2018Governor[4]Cox 55.8 – 44.2%
Senator[5]De Leon 53.3 – 46.7%
2016PresidentTrump 50.8 – 44.0%
SenatorHarris 53.6 – 46.4%
2014GovernorKashkari 58.3 – 41.7%
2012PresidentRomney 54.7 – 43.5%
SenatorEmken 55.9 – 44.1%

List of assembly members representing the district

Due to redistricting, the 23rd district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by the California Citizens Redistricting Commission.

Assembly membersPartyYears servedCounties representedNotes
William T. MearsRepublicanJanuary 5, 1885 – January 3, 1887Sonoma
George W. MorganDemocraticJanuary 3, 1887 – January 7, 1889
Felix B. MulgrewDemocraticJanuary 7, 1889 – January 5, 1891
Frank J. MurphyJanuary 5, 1891 – January 2, 1893
James I. TaylorRepublicanJanuary 2, 1893 – January 7, 1895Marin
James H. WilkinsDemocraticJanuary 7, 1895 – January 4, 1897
M. CanavanRepublicanJanuary 4, 1897 – January 2, 1899
John W. AthertonJanuary 2, 1899 – January 5, 1903
Frank E. DunlapJanuary 5, 1903 – January 2, 1905San Joaquin
Robert BeardsleeJanuary 2, 1905 – January 2, 1911
Elmer H. McGowenJanuary 2, 1911 – January 6, 1913
James J. RyanJanuary 6, 1913 – January 6, 1919San Francisco
Charles J. McColganJanuary 6, 1919 – January 3, 1921
Joseph F. BurnsDemocraticJanuary 3, 1921 – January 7, 1929
Joseph P. GilmoreRepublicanJanuary 7, 1929 – January 2, 1933
William B. HornblowerJanuary 2, 1933 – January 2, 1939
Daniel GallagherDemocraticJanuary 2, 1939 – January 7, 1942Resigned to become a member of the San Francisco Board of Supervisors.
William Clifton BerryJanuary 4, 1943 – May 5, 1954Died in office.
VacantMay 5, 1954 – January 3, 1955
John A. O'ConnellDemocraticJanuary 3, 1955 – January 7, 1963
John Francis ForanJanuary 7, 1963 – November 30, 1974
John VasconcellosDecember 2, 1974 – November 30, 1992Santa Clara
Dominic L. CorteseDecember 7, 1992 – December 8, 1995Changed his party affiliation from Democrat to Reform during his term.[6]
ReformDecember 8, 1995 – November 30, 1996
Mike HondaDemocraticDecember 2, 1996 – November 30, 2000
Manny DiazDecember 4, 2000 – November 30, 2004
Joe CotoDecember 6, 2004 – November 30, 2010
Nora CamposDecember 6, 2010 – November 30, 2012
Jim PattersonRepublicanDecember 3, 2012 – November 30, 2022Fresno, Tulare
Marc BermanDemocraticDecember 5, 2022 – presentSan Mateo, Santa Clara

Election results (1990–present)

2024

2024California State Assembly 23rd district election[7][8]
Primary election
PartyCandidateVotes%
DemocraticMarc Berman (incumbent) 67,177 57.4
DemocraticLydia Kou 23,723 20.3
RepublicanGus Mattamal13,29011.4
RepublicanAllan Marson12,90011.0
Total votes117,090 100.0
General election
DemocraticMarc Berman (incumbent) 115,833 59.8
DemocraticLydia Kou77,94940.2
Total votes193,782 100.0
Democratichold

2022

2022California State Assembly 23rd district election[9][10]
Primary election
PartyCandidateVotes%
DemocraticMarc Berman (incumbent) 83,533 76.3
RepublicanTim Dec 26,002 23.7
Total votes109,535 100.0
General election
DemocraticMarc Berman (incumbent) 124,602 73.4
RepublicanTim Dec45,14926.6
Total votes169,751 100.0
Democraticgain from Republican

2020

2020California State Assembly 23rd district election[11][12]
Primary election
PartyCandidateVotes%
RepublicanJim Patterson (incumbent) 101,217 100.0
Total votes101,217 100.0
General election
RepublicanJim Patterson (incumbent) 177,600 100.0
Total votes177,600 100.0
Republicanhold

2018

2018California State Assembly 23rd district election[13][14]
Primary election
PartyCandidateVotes%
RepublicanJim Patterson (incumbent) 58,927 64.9
DemocraticAileen Rizo 31,902 35.1
Total votes90,829 100.0
General election
RepublicanJim Patterson (incumbent) 98,789 59.4
DemocraticAileen Rizo67,44340.6
Total votes166,232 100.0
Republicanhold

2016

2016California State Assembly 23rd district election[15][16]
Primary election
PartyCandidateVotes%
RepublicanJim Patterson (incumbent) 73,686 77.4
RepublicanGwen L. Morris 21,522 22.6
Total votes95,208 100.0
General election
RepublicanJim Patterson (incumbent) 125,123 75.9
RepublicanGwen L. Morris39,65624.1
Total votes164,809 100.0
Republicanhold

2014

2014California State Assembly 23rd district election[17][18]
Primary election
PartyCandidateVotes%
RepublicanJim Patterson (incumbent) 55,914 100.0
Total votes55,914 100.0
General election
RepublicanJim Patterson (incumbent) 82,417 100.0
Total votes82,417 100.0
Republicanhold

2012

2012California State Assembly 23rd district election[19][20]
Primary election
PartyCandidateVotes%
RepublicanJim Patterson30,827 39.4
RepublicanBob Whalen 19,992 25.5
DemocraticRichard Rojas17,69022.6
RepublicanVong Mouanoutoua5,4877.0
RepublicanDavid DeFrank4,2785.5
Total votes78,274 100.0
General election
RepublicanJim Patterson83,817 54.7
RepublicanBob Whalen69,45745.3
Total votes153,274 100.0
Republicangain from Democratic

2010

2010California State Assembly 23rd district election[21]
PartyCandidateVotes%
DemocraticNora Campos58,629 75.1
RepublicanAtul Saini19,49424.9
Total votes78,123 100.0
Democratichold

2008

2008California State Assembly 23rd district election[22]
PartyCandidateVotes%
DemocraticJoe Coto (incumbent) 81,523 76.6
RepublicanMark Patrosso24,87623.4
Total votes106,399 100.0
Democratichold

2006

2006California State Assembly 23rd district election[23]
PartyCandidateVotes%
DemocraticJoe Coto (incumbent) 49,977 73.9
RepublicanMark Patrosso17,67126.1
Total votes67,648 100.0
Democratichold

2004

2004California State Assembly 23rd district election[24]
PartyCandidateVotes%
DemocraticJoe Coto62,569 67.1
RepublicanMark Patrosso26,05127.9
GreenWarner S. Bloomberg IIi4,5974.9
Total votes93,217 100.0
Democratichold

2002

2002California State Assembly 23rd district election[25]
PartyCandidateVotes%
DemocraticManny Diaz (incumbent) 42,461 81.6
GreenWarner S. Bloomberg III9,61018.4
Total votes52,071 100.0
Democratichold

2000

2000California State Assembly 23rd district election[26]
PartyCandidateVotes%
DemocraticManny Diaz58,020 71.6
RepublicanTom Askeland17,53121.6
LibertarianDana W. Albrecht5,4786.8
Total votes81,029 100.0
Democratichold

1998

1998California State Assembly 23rd district election[27]
PartyCandidateVotes%
DemocraticMike Honda (incumbent) 45,340 75.8
RepublicanPatrick Du Long14,49824.2
Total votes59,838 100.0
Democratichold

1996

1996California State Assembly 23rd district election[28]
PartyCandidateVotes%
DemocraticMike Honda54,370 73.4
RepublicanLisa M. Sutton19,71226.6
Total votes74,082 100.0
Democraticgain from Reform

1994

1994California State Assembly 23rd district election[29]
PartyCandidateVotes%
DemocraticDominic L. Cortese (incumbent) 36,575 64.3
RepublicanFrank Jewett15,64727.5
GreenTim K. Fitzgerald4,6308.1
Total votes56,852 100.0
Democratichold

1992

1992California State Assembly 23rd district election[30]
PartyCandidateVotes%
DemocraticDominic L. Cortese (incumbent) 54,539 65.9
RepublicanMonica A. Valladares28,21234.1
Total votes82,751 100.0
Democratichold

1990

1990California State Assembly 23rd district election[31]
PartyCandidateVotes%
DemocraticJohn Vasconcellos (incumbent) 43,553 62.7
RepublicanMonica A. Valladares25,89537.3
Total votes69,448 100.0
Democratichold

See also

References

  1. 1234"Citizens Redistricting Commission Final Report, 2021"(PDF).
  2. ↑"California Secretary of State 15-Day Report February 20, 2024"(PDF).
  3. ↑"2020 Presidential by Legislative District & Most Recent Election Result". CNalysis. April 16, 2021. Archived from the original on June 4, 2021. Retrieved June 9, 2021.
  4. ↑"Supplement to the Statement of Vote"(PDF). ca.gov. Retrieved September 17, 2023.
  5. ↑"Supplement to the Statement of Vote"(PDF). ca.gov. Retrieved September 17, 2023.
  6. ↑"Democratic Legislator Switches to Perot Party". Los Angeles Times. December 6, 1995.
  7. ↑"Presidential Primary Election - Statement of Vote, March 5, 2024 - State Assembly"(PDF). Secretary of State of California. Archived from the original(PDF) on April 13, 2024.
  8. ↑"General Election - Statement of Vote, November 5, 2024 - State Assemblymember By District"(PDF). Secretary of State of California.
  9. ↑"June 7, 2022, Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  10. ↑"November 8, 2022, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  11. ↑"March 3, 2020, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  12. ↑"November 3, 2020, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  13. ↑"June 5, 2018, Statewide Direct Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  14. ↑"November 6, 2018, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  15. ↑"June 7, 2016, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  16. ↑"November 8, 2016, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  17. ↑"June 3, 2014, Statewide Direct Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  18. ↑"November 4, 2014, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  19. ↑"June 5, 2012, Presidential Primary Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  20. ↑"November 6, 2012, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  21. ↑"November 2, 2010, General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  22. ↑"November 4, 2008, Presidential General Election - State Assemblymember"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  23. ↑"November 7, 2006, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  24. ↑"November 2, 2004, Presidential General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  25. ↑"November 5, 2002, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  26. ↑"November 7, 2000, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  27. ↑"November 3, 1998, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  28. ↑"November 5, 1996, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  29. ↑"November 8, 1994, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  30. ↑"November 3, 1992, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.
  31. ↑"November 6, 1990, General Election - Member of the State Assembly"(PDF). Secretary of State of California. Retrieved November 22, 2025.