| District: | 30 |
| Chamber: | Senate |
| Population: | 922,496[1] |
| Population Year: | 2010 |
| Voting Age: | 686,822 |
| Citizen Voting Age: | 465,763 |
| Percent White: | 14.05 |
| Percent Black: | 27.90 |
| Percent Latino: | 50.04 |
| Percent Asian: | 6.30 |
| Percent Native American: | 0.24 |
| Percent Pacific Islander: | 0.11 |
| Percent Other Race: | 0.51 |
| Percent Remainder Of Multiracial: | 0.85 |
| Registered: | 550,416[2] |
| Democratic: | 64.84 |
| Republican: | 6.74 |
| Npp: | 23.18 |
California's 30th senatorial district is one of 40 California State Senate districts. The seat is currently represented by of .
The district encompasses the Gateway Cities region of southeastern Los Angeles County, including Downey, Norwalk, Bellflower, La Mirada, Santa Fe Springs, Los Nietos, Montebello, Pico Rivera, Whittier, Hacienda Heights, La Puente, Valinda, Avocado Heights, Industry, Rowland Heights, Walnut, and Diamond Bar, along with Brea in northeastern Orange County.
| Year | Office | Results |
|---|---|---|
| 2021 | Recall | align="right" No 86.8 – 13.2% |
| 2020 | President | Biden 85.6 – 12.5% |
| 2018 | Governor | Newsom 87.5 – 12.5% |
| Senator | Feinstein 64.0 – 36.0% | |
| 2016 | President | Clinton 87.5 – 8.0% |
| Senator | Harris 71.3 – 28.7% | |
| 2014 | Governor | Brown 86.0 – 14.0% |
| 2012 | President | Obama 88.3 – 9.7% |
| Senator | Feinstein 88.4 – 11.6% |
| Senators | Party | Years served | Electoral history | Counties represented | |
|---|---|---|---|---|---|
| District established January 3, 1887 | |||||
| A. J. Meany | Democratic | January 3, 1887 – January 5, 1891 | Elected in 1886. Retired. | Merced, Stanislaus, Tuolumne | |
Thomas D. Harp | Democratic | January 5, 1891 – October 31, 1891 | Elected in 1890. Indicted on bribery charges and fled the state. | ||
| Vacant | October 31, 1891 – January 7, 1895 | ||||
| Frederick C. Franck | Republican | January 7, 1895 – January 2, 1899 | Elected in 1894. | Santa Clara | |
| Charles M. Shortridge | Republican | January 2, 1899 – January 5, 1903 | Elected in 1898. Restricted to the 28th district. | ||
Orrin Z. Hubbell | Republican | January 5, 1903 – April 17, 1903 | Elected in 1902. Died.[3] | Inyo, San Bernardino | |
| Vacant | April 17, 1903 – January 2, 1905 | ||||
William T. Leeke | Republican | January 2, 1905 – January 7, 1907 | Elected in 1904. | ||
| Henry M. Willis | Republican | January 7, 1907 – January 2, 1911 | Elected in 1906. | ||
John L. Avey | Republican | January 2, 1911 – January 4, 1915 | Elected in 1910. | ||
| Lyman King | Republican | January 4, 1915 – January 8, 1923 | Elected in 1914. Re-elected in 1918. | ||
| Ralph E. Swing | Democratic | January 8, 1923 – January 5, 1931 | Elected in 1922. Re-elected in 1926. Redistricted to the 36th district. | ||
| Ray W. Hays | Republican | January 5, 1931 – January 4, 1943 | Elected in 1930. Re-elected in 1934. Re-elected in 1938. | Fresno | |
| Hugh M. Burns | Democratic | January 4, 1943 – January 2, 1967 | Elected in 1942. Re-elected in 1946. Re-elected in 1950. Re-elected in 1954. Re-elected in 1958. Re-elected in 1962. Redistricted to the 16th district. | ||
| Lawrence E. Walsh | Democratic | January 2, 1967 – November 30, 1974 | Elected in 1966. Re-elected in 1970. Retired to run for Lieutenant Governor. | Los Angeles | |
| Nate Holden | Democratic | December 2, 1974 – November 30, 1978 | Elected in 1974. Retired to run for U.S. House of Representatives. | ||
| Diane Watson | Democratic | December 4, 1978 – November 30, 1982 | Elected in 1978. Redistricted to the 26th district. | ||
| Ralph C. Dills | Democratic | December 6, 1982 – November 30, 1994 | Elected in 1982. Re-elected in 1986. Re-elected in 1990. Redistricted to the 28th district. | ||
| Charles Calderon | Democratic | December 4, 1994 – December 7, 1998 | Elected in 1994. Retired to run for Attorney General. | ||
| Martha Escutia | Democratic | December 7, 1998 – November 30, 2006 | Elected in 1998. Re-elected in 2002. Termed out. | ||
| Ron Calderon | Democratic | December 4, 2006 – November 30, 2014 | Elected in 2006. Re-elected in 2010. Redistricted to the 32nd district and termed out. | ||
| Holly Mitchell | Democratic | December 1, 2014 – December 6, 2020 | Elected in 2014. Re-elected in 2018. Resigned to become a member of the Los Angeles County Board of Supervisors. | ||
| Vacant | December 6, 2020 – March 11, 2021 | ||||
| Sydney Kamlager | Democratic | March 11, 2021 – January 3, 2023 | Elected in finish Mitchell's term. Retired to become a member of the U.S. House of Representatives. | ||
| Bob Archuleta | Democratic | January 3, 2023 – present | Redistricted from the 32nd district and re-elected in 2022. | ||
California Gov. Gavin Newsom announced that a special election will take place on March 2, 2021.[4] As of March 13th, 2021, election results have certified candidate Sydney Kamlager won the election and will represent California's 30th Senate district.[5] Her term ends on November 8, 2022.