| District: | 23 |
| Chamber: | Senate |
| Population: | 1,033,749[1] |
| Population Year: | 2020 |
| Voting Age: | 681,524 |
| Citizen Voting Age: | 622,618 |
| Percent White: | 45.5 |
| Percent Black: | 10.8 |
| Percent Latino: | 37.9 |
| Percent Asian: | 5.8 |
| Registered: | 561,146[2] |
| Democratic: | 40.44 |
| Republican: | 29.97 |
| Npp: | 21.07 |
California's 23rd senatorial district is one of 40 California State Senate districts. It is currently represented by of .
For and after the 2024 California State Senate election, the district will encompass the high desert communities of the Antelope Valley and Victor Valley, as well as the Santa Clarita Valley in Los Angeles County. The district has a very large Latino population.
| Year | Office | Results |
|---|---|---|
| 2022 | Governor | Dahle 53.6 – 46.4% |
| Senator | Meuser 51.5 – 48.5% | |
| 2020 | President | Biden 49.0 – 48.8% |
| 2018 | Governor | Cox 54.4 – 45.6% |
| Senator | de Leon 52.6 – 47.4% | |
| 2016 | President | Trump 48.7 – 45.7% |
| Senator | Harris 58.3 – 41.7% | |
| 2014 | Governor | Kashkari 57.7 – 42.3% |
| 2012 | President | Romney 51.8 – 46.0% |
| Senator | Emken 51.9 – 48.1% |
| Years | Seat A | Seat B | Counties represented | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Senator | Party | Electoral history | Member | Party | Electoral history | |||||
| District established January 6, 1862 | ||||||||||
| January 6, 1862 – December 7, 1863 | Lewis Cunningham | Union | Elected in 1862. Re-elected in 1863. Re-elected in 1865. | William H. Parks | Union | Elected in 1862. | Yuba | |||
| December 7, 1863 – December 4, 1865 | Charles S. Haswell | Union | Elected in 1863. | Sutter, Yuba | ||||||
| December 4, 1865 – December 6, 1867 | Eli Teegarden | Union | Elected in 1865. Re-elected in 1867. | |||||||
| December 6, 1867 – December 6, 1869 | Horace Beach | Union | Elected in 1867. | |||||||
| December 6, 1869 – December 4, 1871 | Samuel C. Hutchings | Democratic | Elected in 1868. | Second seat was eliminated for the term. | ||||||
| December 4, 1871 – December 1, 1873 | L. T. Crane | Republican | Elected in 1871. | |||||||
| Senator | Party | Years served | Electoral history | Counties represented | |
|---|---|---|---|---|---|
Stephen L. Spencer | Republican | December 1, 1873 – December 6, 1875 | Elected in 1873. Redistricted to the 25th district. | Sutter, Yuba | |
Thomas Fraser | Republican | December 6, 1875 – December 3, 1877 | Elected in 1874. | Alpine, El Dorado | |
William H. Brown | Republican | December 3, 1877 – January 8, 1883 | Elected in 1877. Re-elected in 1879. Re-elected in 1880. | ||
Thomas Fraser | Republican | January 8, 1883 – January 5, 1885 | Elected in 1882. | ||
Henry Mahler | Democratic | January 5, 1885 – January 3, 1887 | Elected in 1884. Retired to run for State Assembly. | ||
P. J. Crimmins | Republican | January 3, 1887 – January 7, 1889 | Elected in 1886. | San Francisco | |
William H. Williams | Democratic | January 7, 1889 – January 2, 1893 | Elected in 1888. | ||
Charles S. Arms | Democratic | January 2, 1893 – January 4, 1897 | Elected in 1892. | ||
Sydney Hall | Democratic | January 4, 1897 – January 1, 1901 | Elected in 1896. | ||
John G. Tyrrell | Republican | January 1, 1901 – January 2, 1905 | Elected in 1900. | ||
George B. Keane | Republican | January 2, 1905 – January 4, 1909 | Elected in 1904. | ||
John P. Hare | Democratic | January 4, 1909 – January 6, 1913 | Elected in 1908. | ||
Thomas F. Finn | Republican | January 6, 1913 – January 8, 1917 | Elected in 1912. | ||
Walter A. McDonald | Republican | January 8, 1917 – January 5, 1925 | Elected in 1916. | ||
Thomas A. Maloney | Republican | January 5, 1925 – January 2, 1933 | Elected in 1924. Re-elected in 1928. Retired to run for State Assembly. | ||
Bert B. Snyder | Republican | January 2, 1933 – January 4, 1937 | Elected in 1932. Lost re-election. | Santa Cruz | |
James B. Holohan . | Democratic | January 4, 1937 – January 6, 1941 | Elected in 1936. | ||
H. R. Judah | Republican | January 6, 1941 – January 5, 1953 | Elected in 1940. Re-elected in 1944. Re-elected in 1948. | ||
Donald L. Grunsky | Republican | January 5, 1953 – January 2, 1967 | Elected in 1952. Re-elected in 1956. Re-elected in 1960. Re-elected in 1964. Redistricted to the 17th district. | San Benito, Santa Cruz | |
Lou Cusanovich | Republican | January 2, 1967 – November 30, 1976 | Elected in 1966. Re-elected in 1970. Re-elected in 1974. Redistricted to the 19th district. | Los Angeles | |
David Roberti | Democratic | December 6, 1976 – July 2, 1992 | Redistricted from the 27th district and re-elected in 1976. Re-elected in 1980. Re-elected in 1984. Re-elected in 1988. Resigned to assume seat in 20th district. | ||
| Vacant | July 2, 1992 – December 7, 1992 | ||||
Tom Hayden | Democratic | December 7, 1992 – November 30, 2000 | Elected in 1992. Re-elected in 1996. Retired due to term limits. | ||
Sheila Kuehl | Democratic | December 4, 2000 – November 30, 2008 | Elected in 2000. Re-elected in 2004. Retired due to term limits. | ||
Fran Pavley | Democratic | December 1, 2008 – November 30, 2012 | Elected in 2008. Redistricted to the 27th district. | Los Angeles, Ventura | |
Bill Emmerson | Republican | December 3, 2012 – December 1, 2013 | Redistricted from the 37th district and Re-elected in 2012. Resigned. | Los Angeles, Riverside, San Bernardino | |
| Vacant | December 1, 2013 – April 3, 2014 | ||||
Mike Morrell | Republican | April 3, 2014 – November 30, 2020 | Elected to finish Emmerson's term. Re-elected in 2016. Retired due to term limits. | ||
Rosilicie Ochoa Bogh | Republican | December 7, 2020 – November 30, 2024 | Elected in 2020. Redistricted to the 19th district. | ||
Suzette Martinez Valladares | Republican | December 2, 2024 – present | Elected in 2024. | ||