| District: | 23 |
| Chamber: | Assembly |
| Population: | 474,000[1] |
| Population Year: | 2020 |
| Voting Age: | 378,104 |
| Citizen Voting Age: | 305,410 |
| Percent White: | 47.27 |
| Percent Black: | 1.61 |
| Percent Latino: | 13.36 |
| Percent Asian: | 31.02 |
| Percent Native American: | 0.12 |
| Percent Pacific Islander: | 0.32 |
| Percent Other Race: | 0.64 |
| Percent Remainder Of Multiracial: | 5.65 |
| Registered: | 282,794[2] |
| Democratic: | 54.27 |
| Republican: | 14.46 |
| Npp: | 26.94 |
California's 23rd State Assembly district is one of 80 California State Assembly districts. It is currently represented by Democrat Marc Berman of Menlo Park.
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.
San Mateo County – 16.2%
Santa Clara County – 18.0%
| Year | Office | Results |
|---|---|---|
| 2021 | Recall | align="right" 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.
| 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 the San Francisco County Board of Supervisors | ||
| William Clifton Berry | January 4, 1943 - May 5, 1954 | Died in office. | |||
| John A. O'Connell | 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.[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 | ||