| California's 23rd State Assembly district | |||
|---|---|---|---|
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| Current assemblymember |
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| Population (2020) • Voting age • Citizen voting age | 474,000[1] 378,104[1] 305,410[1] | ||
| Demographics |
| ||
| Registered voters | 282,794[2] | ||
| Registration | 54.27% Democratic 14.46% Republican 26.94% No party preference | ||
California's 23rd State Assembly district is one of 80CaliforniaState Assembly districts. It is currently represented byDemocratMarc Berman ofMenlo Park.
As of the 2020 redistricting (which took effect as of the 2022 elections), the district includesSilicon Valley communities, containing multiple notable high-tech companies and parts of theCaltrain corridor, as well as smaller, rural districts along the coast.
San Mateo County –16.2% | Santa Clara County –18.0%
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Due to redistricting, the 23rd district has been moved around different parts of the state.
| Year | Office | Results |
|---|---|---|
| 2022 | Governor | Newsom 74.7 – 25.3% |
| Senator | Padilla 76.2 – 23.8% | |
| 2021 | Recall |  Yes 56.5 – 43.5% |
| 2020[3] | President | Trump 50.2 – 47.8% |
| 2018 | Governor[4] | Cox 55.8 – 44.2% |
| Senator[5] | De Leon 53.3 – 46.7% | |
| 2016 | President | Trump 50.8 – 44.0% |
| Senator | Harris 53.6 – 46.4% | |
| 2014 | Governor | Kashkari 58.3 – 41.7% |
| 2012 | President | Romney 54.7 – 43.5% |
| Senator | Emken 55.9 – 44.1% |
Due to redistricting, the 23rd district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by theCalifornia Citizens Redistricting Commission.
| Assembly members | Party | Years served | Counties represented | Notes |
|---|---|---|---|---|
| William T. Mears | Republican | January 5, 1885 – January 3, 1887 | Sonoma | |
| George W. Morgan | Democratic | January 3, 1887 – January 7, 1889 | ||
| Felix B. Mulgrew | Democratic | January 7, 1889 – January 5, 1891 | ||
| Frank J. Murphy | January 5, 1891 – January 2, 1893 | |||
| James I. Taylor | Republican | January 2, 1893 – January 7, 1895 | Marin | |
| James H. Wilkins | Democratic | January 7, 1895 – January 4, 1897 | ||
| M. Canavan | Republican | January 4, 1897 – January 2, 1899 | ||
| John W. Atherton | January 2, 1899 – January 5, 1903 | |||
| Frank E. Dunlap | January 5, 1903 – January 2, 1905 | San Joaquin | ||
| Robert Beardslee | January 2, 1905 – January 2, 1911 | |||
| Elmer H. McGowen | January 2, 1911 – January 6, 1913 | |||
| James J. Ryan | January 6, 1913 – January 6, 1919 | San Francisco | ||
| Charles J. McColgan | January 6, 1919 – January 3, 1921 | |||
| Joseph F. Burns | Democratic | January 3, 1921 – January 7, 1929 | ||
| Joseph P. Gilmore | Republican | January 7, 1929 – January 2, 1933 | ||
| William B. Hornblower | January 2, 1933 – January 2, 1939 | |||
| Daniel Gallagher | Democratic | January 2, 1939 – January 7, 1942 | Resigned to become a member of theSan Francisco Board of Supervisors. | |
| William Clifton Berry | January 4, 1943 – May 5, 1954 | Died in office. | ||
| Vacant | May 5, 1954 – January 3, 1955 | |||
| John A. O'Connell | Democratic | January 3, 1955 – January 7, 1963 | ||
| John Francis Foran | January 7, 1963 – November 30, 1974 | |||
| John Vasconcellos | December 2, 1974 – November 30, 1992 | Santa Clara | ||
| Dominic L. Cortese | December 7, 1992 – December 8, 1995 | Changed his party affiliation from Democrat to Reform during his term.[6] | ||
| Reform | December 8, 1995 – November 30, 1996 | |||
| Mike Honda | Democratic | December 2, 1996 – November 30, 2000 | ||
| Manny Diaz | December 4, 2000 – November 30, 2004 | |||
| Joe Coto | December 6, 2004 – November 30, 2010 | |||
| Nora Campos | December 6, 2010 – November 30, 2012 | |||
| Jim Patterson | Republican | December 3, 2012 – November 30, 2022 | Fresno,Tulare | |
| Marc Berman | Democratic | December 5, 2022 – present | San Mateo,Santa Clara | |
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Democratic | Marc Berman (incumbent) | 67,177 | 57.4 | |
| Democratic | Lydia Kou | 23,723 | 20.3 | |
| Republican | Gus Mattamal | 13,290 | 11.4 | |
| Republican | Allan Marson | 12,900 | 11.0 | |
| Total votes | 117,090 | 100.0 | ||
| General election | ||||
| Democratic | Marc Berman (incumbent) | 115,833 | 59.8 | |
| Democratic | Lydia Kou | 77,949 | 40.2 | |
| Total votes | 193,782 | 100.0 | ||
| Democratichold | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Democratic | Marc Berman (incumbent) | 83,533 | 76.3 | |
| Republican | Tim Dec | 26,002 | 23.7 | |
| Total votes | 109,535 | 100.0 | ||
| General election | ||||
| Democratic | Marc Berman (incumbent) | 124,602 | 73.4 | |
| Republican | Tim Dec | 45,149 | 26.6 | |
| Total votes | 169,751 | 100.0 | ||
| Democraticgain fromRepublican | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Republican | Jim Patterson (incumbent) | 101,217 | 100.0 | |
| Total votes | 101,217 | 100.0 | ||
| General election | ||||
| Republican | Jim Patterson (incumbent) | 177,600 | 100.0 | |
| Total votes | 177,600 | 100.0 | ||
| Republicanhold | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Republican | Jim Patterson (incumbent) | 58,927 | 64.9 | |
| Democratic | Aileen Rizo | 31,902 | 35.1 | |
| Total votes | 90,829 | 100.0 | ||
| General election | ||||
| Republican | Jim Patterson (incumbent) | 98,789 | 59.4 | |
| Democratic | Aileen Rizo | 67,443 | 40.6 | |
| Total votes | 166,232 | 100.0 | ||
| Republicanhold | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Republican | Jim Patterson (incumbent) | 73,686 | 77.4 | |
| Republican | Gwen L. Morris | 21,522 | 22.6 | |
| Total votes | 95,208 | 100.0 | ||
| General election | ||||
| Republican | Jim Patterson (incumbent) | 125,123 | 75.9 | |
| Republican | Gwen L. Morris | 39,656 | 24.1 | |
| Total votes | 164,809 | 100.0 | ||
| Republicanhold | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Republican | Jim Patterson (incumbent) | 55,914 | 100.0 | |
| Total votes | 55,914 | 100.0 | ||
| General election | ||||
| Republican | Jim Patterson (incumbent) | 82,417 | 100.0 | |
| Total votes | 82,417 | 100.0 | ||
| Republicanhold | ||||
| Primary election | ||||
|---|---|---|---|---|
| Party | Candidate | Votes | % | |
| Republican | Jim Patterson | 30,827 | 39.4 | |
| Republican | Bob Whalen | 19,992 | 25.5 | |
| Democratic | Richard Rojas | 17,690 | 22.6 | |
| Republican | Vong Mouanoutoua | 5,487 | 7.0 | |
| Republican | David DeFrank | 4,278 | 5.5 | |
| Total votes | 78,274 | 100.0 | ||
| General election | ||||
| Republican | Jim Patterson | 83,817 | 54.7 | |
| Republican | Bob Whalen | 69,457 | 45.3 | |
| Total votes | 153,274 | 100.0 | ||
| Republicangain fromDemocratic | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Nora Campos | 58,629 | 75.1 | |
| Republican | Atul Saini | 19,494 | 24.9 | |
| Total votes | 78,123 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Joe Coto (incumbent) | 81,523 | 76.6 | |
| Republican | Mark Patrosso | 24,876 | 23.4 | |
| Total votes | 106,399 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Joe Coto (incumbent) | 49,977 | 73.9 | |
| Republican | Mark Patrosso | 17,671 | 26.1 | |
| Total votes | 67,648 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Joe Coto | 62,569 | 67.1 | |
| Republican | Mark Patrosso | 26,051 | 27.9 | |
| Green | Warner S. Bloomberg IIi | 4,597 | 4.9 | |
| Total votes | 93,217 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Manny Diaz (incumbent) | 42,461 | 81.6 | |
| Green | Warner S. Bloomberg III | 9,610 | 18.4 | |
| Total votes | 52,071 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Manny Diaz | 58,020 | 71.6 | |
| Republican | Tom Askeland | 17,531 | 21.6 | |
| Libertarian | Dana W. Albrecht | 5,478 | 6.8 | |
| Total votes | 81,029 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Mike Honda (incumbent) | 45,340 | 75.8 | |
| Republican | Patrick Du Long | 14,498 | 24.2 | |
| Total votes | 59,838 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Mike Honda | 54,370 | 73.4 | |
| Republican | Lisa M. Sutton | 19,712 | 26.6 | |
| Total votes | 74,082 | 100.0 | ||
| Democraticgain fromReform | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Dominic L. Cortese (incumbent) | 36,575 | 64.3 | |
| Republican | Frank Jewett | 15,647 | 27.5 | |
| Green | Tim K. Fitzgerald | 4,630 | 8.1 | |
| Total votes | 56,852 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Dominic L. Cortese (incumbent) | 54,539 | 65.9 | |
| Republican | Monica A. Valladares | 28,212 | 34.1 | |
| Total votes | 82,751 | 100.0 | ||
| Democratichold | ||||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | John Vasconcellos (incumbent) | 43,553 | 62.7 | |
| Republican | Monica A. Valladares | 25,895 | 37.3 | |
| Total votes | 69,448 | 100.0 | ||
| Democratichold | ||||
