Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. |
C |
Class 3Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, and 2016, and 2022. The next election will be in 2028. |
| # |
Senator |
Party |
Dates in office |
Electoral history |
T |
T |
Electoral history |
Dates in office |
Party |
Senator |
# |
| 1 |
 John C. Frémont |
Democratic |
Sep 9, 1850 – Mar 3, 1851 |
Elected in 1849. |
1 |
31st |
1 |
Elected in 1849. |
Sep 9, 1850 – Mar 3, 1855 |
Democratic |
 William M. Gwin |
1 |
| Vacant |
Mar 4, 1851 – Jan 29, 1852 |
Legislature failed to elect. |
2 |
32nd |
| 2 |
 John B. Weller |
Democratic |
Jan 30, 1852 – Mar 3, 1857 |
Elected late in 1852.Lost re-election. |
| 33rd |
| 34th |
2 |
Legislature failed to elect. |
Mar 4, 1855 – Jan 13, 1857 |
Vacant |
| Elected late in 1857. |
Jan 14, 1857 – Mar 3, 1861 |
Democratic |
 William M. Gwin |
| 3 |
 David C. Broderick |
Democratic |
Mar 4, 1857 – Sep 16, 1859 |
Elected in 1857.Died. |
3 |
35th |
| 36th |
| Vacant |
Sep 17, 1859 – Nov 2, 1859 |
|
| 4 |
 Henry P. Haun |
Democratic |
Nov 3, 1859 – Mar 4, 1860 |
Appointed to continue Broderick's term.Lost election to finish Broderick's term. |
| 5 |
 Milton Latham |
Democratic |
Mar 5, 1860 – Mar 3, 1863 |
Elected in 1860 to finish Broderick's term.Retired. |
| 37th |
3 |
Elected in 1861.Retired. |
Mar 4, 1861 – Mar 3, 1867 |
Democratic |
 James A. McDougall |
2 |
| 6 |
 John Conness |
Union[1] |
Mar 4, 1863 – Mar 3, 1869 |
Elected in 1863. |
4 |
38th |
| 39th |
| 40th |
4 |
Elected in 1865. |
Mar 4, 1867 – Mar 3, 1873 |
National Union |
 Cornelius Cole |
3 |
| 7 |
 Eugene Casserly |
Democratic |
Mar 4, 1869 – Nov 29, 1873 |
Elected in 1867.Resigned. |
5 |
41st |
| 42nd |
| 43rd |
5 |
Elected in 1871.Retired. |
Mar 4, 1873 – Mar 3, 1879 |
Republican |
 Aaron A. Sargent |
4 |
| Vacant |
Nov 30, 1873 – Dec 22, 1873 |
|
| 8 |
 John S. Hager |
Democratic |
Dec 23, 1873 – Mar 3, 1875 |
Elected in 1873 to finish Casserly's term.Retired. |
| 9 |
 Newton Booth |
Anti-Monopoly |
Mar 4, 1875 – Mar 3, 1881 |
Elected early in 1873.Retired. |
6 |
44th |
| 45th |
| 46th |
6 |
Elected in 1877.Retired. |
Mar 4, 1879 – Mar 3, 1885 |
Democratic |
 James T. Farley |
5 |
| 10 |
 John Franklin Miller |
Republican |
Mar 4, 1881 – Mar 8, 1886 |
Elected in 1881.Died. |
7 |
47th |
| 48th |
| 49th |
7 |
Elected in 1885. |
Mar 4, 1885 – Jun 21, 1893 |
Republican |
 Leland Stanford |
6 |
| Vacant |
Mar 9, 1886 – Mar 22, 1886 |
|
| 11 |
 George Hearst |
Democratic |
Mar 23, 1886 – Aug 3, 1886 |
Appointed to continue Miller's term.Successor elected. |
| 12 |
 Abram Williams |
Republican |
Aug 4, 1886 – Mar 3, 1887 |
Elected in 1886 to finish Miller's term.Retired. |
| 13 |
 George Hearst |
Democratic |
Mar 4, 1887 – Feb 28, 1891 |
Elected in 1887.Died. |
8 |
50th |
| 51st |
| Vacant |
Mar 1, 1891 – Mar 18, 1891 |
|
| 52nd |
8 |
Re-elected in 1891.Died. |
| 14 |
 Charles N. Felton |
Republican |
Mar 19, 1891 – Mar 3, 1893 |
Elected in 1891 to finish Hearst's term.Retired. |
| 15 |
 Stephen M. White |
Democratic |
Mar 4, 1893 – Mar 3, 1899 |
Elected in 1893.Retired. |
9 |
53rd |
| |
Jun 22, 1893 – Jul 25, 1893 |
Vacant |
| Appointed to continue Stanford's term.Elected in 1895 to finish Stanford's term. |
Jul 26, 1893 – Mar 3, 1915 |
Republican |
 George C. Perkins |
7 |
| 54th |
| 55th |
9 |
Re-elected in 1897.[3] |
| Vacant |
Mar 4, 1899 – Feb 6, 1900 |
|
10 |
56th |
| 16 |
 Thomas R. Bard |
Republican |
Feb 7, 1900 – Mar 3, 1905 |
Elected late in 1900.Lost re-election. |
| 57th |
| 58th |
10 |
Re-elected in 1903.[4] |
| 17 |
 Frank P. Flint |
Republican |
Mar 4, 1905 – Mar 3, 1911 |
Elected in 1905.[5]Retired. |
11 |
59th |
| 60th |
| 61st |
11 |
Re-elected in 1909.[6]Retired. |
| 18 |
 John D. Works |
Republican |
Mar 4, 1911 – Mar 3, 1917 |
Elected in 1911.Retired. |
12 |
62nd |
| 63rd |
| 64th |
12 |
Elected in 1914.Lost re-election. |
Mar 4, 1915 – Mar 3, 1921 |
Democratic |
 James D. Phelan |
8 |
| 19 |
 Hiram Johnson |
Republican |
Mar 4, 1917 – Aug 6, 1945 |
Elected in 1916.Not seated until March 16 in order to remain governor of California. |
13 |
65th |
| 66th |
| 67th |
13 |
Elected in 1920. |
Mar 4, 1921 – Mar 3, 1933 |
Republican |
 Samuel M. Shortridge |
9 |
| Re-elected in 1922. |
14 |
68th |
| 69th |
| 70th |
14 |
Re-elected in 1926.Lost renomination. |
| Re-elected in 1928. |
15 |
71st |
| 72nd |
| 73rd |
15 |
Elected in 1932.Lost renomination, then resigned. |
Mar 4, 1933 – Nov 8, 1938 |
Democratic |
 William Gibbs McAdoo |
10 |
| Re-elected in 1934. |
16 |
74th |
| 75th |
| Appointed to finish McAdoo's term.Retired. |
Nov 9, 1938 – Jan 3, 1939 |
Democratic |
 Thomas M. Storke |
11 |
| 76th |
16 |
Elected in 1938. |
Jan 3, 1939 – Nov 30, 1950 |
Democratic |
 Sheridan Downey |
12 |
| Re-elected in 1940.Died. |
17 |
77th |
| 78th |
| 79th |
17 |
Re-elected in 1944.Ran for re-election, but withdrew from renomination due to ill health.Resigned early due to ill health. |
| Vacant |
Aug 7, 1945 – Aug 25, 1945 |
|
| 20 |
 William F. Knowland |
Republican |
Aug 26, 1945 – Jan 3, 1959 |
Appointed to continue Johnson's term.Elected in 1946 to finish Johnson's term.[a] |
| Elected to full term in 1946.[a] |
18 |
80th |
| 81st |
Appointed to finish Downey's term, having been elected to the next term. |
Dec 1, 1950 – Jan 1, 1953 |
Republican |
 Richard Nixon |
13 |
| 82nd |
18 |
Elected in 1950.Resigned to become U.S. Vice President. |
| Appointed to continue Nixon's term.Elected in 1954 to finish Nixon's term. |
Jan 2, 1953 – Jan 3, 1969 |
Republican |
 Thomas Kuchel |
14 |
| Re-elected in 1952.Retired to run for governor of California. |
19 |
83rd |
| 84th |
| 85th |
19 |
Re-elected in 1956. |
| 21 |
 Clair Engle |
Democratic |
Jan 3, 1959 – Jul 30, 1964 |
Elected in 1958.Died. |
20 |
86th |
| 87th |
| 88th |
20 |
Re-elected in 1962.Lost renomination. |
| Vacant |
Jul 31, 1964 – Aug 3, 1964 |
|
| 22 |
 Pierre Salinger |
Democratic |
Aug 4, 1964 – Dec 31, 1964 |
Appointed to finish Engle's term.Lost election to full term, resigned early to give successor preferential seniority. |
| 23 |
 George Murphy |
Republican |
Jan 1, 1965 – Jan 1, 1971 |
Appointed early to finish Engle's term, having been elected to the next term. |
| Elected in 1964.Lost re-election, resigned early to give successor preferential seniority. |
21 |
89th |
| 90th |
| 91st |
21 |
Elected in 1968. |
Jan 3, 1969 – Jan 3, 1993 |
Democratic |
Alan Cranston |
15 |
| 24 |
 John V. Tunney |
Democratic |
Jan 2, 1971 – Jan 1, 1977 |
Appointed to finish Murphy's term, having been elected to the next term. |
| Elected in 1970.Lost re-election, resigned early to give successor preferential seniority. |
22 |
92nd |
| 93rd |
| 94th |
22 |
Re-elected in 1974. |
| 25 |
 S. I. Hayakawa |
Republican |
Jan 2, 1977 – Jan 3, 1983 |
Appointed to finish Tunney's term, having been elected to the next term. |
| Elected in 1976.Retired. |
23 |
95th |
| 96th |
| 97th |
23 |
Re-elected in 1980. |
| 26 |
 Pete Wilson |
Republican |
Jan 3, 1983 – Jan 7, 1991 |
Elected in 1982. |
24 |
98th |
| 99th |
| 100th |
24 |
Re-elected in 1986.Retired. |
| Re-elected in 1988.Resigned to become governor of California. |
25 |
101st |
| 102nd |
| 27 |
 John Seymour |
Republican |
Jan 7, 1991 – Nov 3, 1992 |
Appointed to continue Wilson's term.Lost election to finish Wilson's term. |
| 28 |
 Dianne Feinstein |
Democratic |
Nov 4, 1992 – Sep 29, 2023 |
Elected in 1992 to finish Wilson's term. |
| 103rd |
25 |
Elected in 1992. |
Jan 3, 1993 – Jan 3, 2017 |
Democratic |
 Barbara Boxer |
16 |
| Re-elected in 1994. |
26 |
104th |
| 105th |
| 106th |
26 |
Re-elected in 1998. |
| Re-elected in 2000. |
27 |
107th |
| 108th |
| 109th |
27 |
Re-elected in 2004. |
| Re-elected in 2006. |
28 |
110th |
| 111th |
| 112th |
28 |
Re-elected in 2010.Retired. |
| Re-elected in 2012. |
29 |
113th |
| 114th |
| 115th |
29 |
Elected in 2016.Resigned to become U.S. Vice President.[7] |
Jan 3, 2017 – Jan 18, 2021 |
Democratic |
 Kamala Harris |
17 |
| Re-elected in 2018.Announced retirement, then died. |
30 |
116th |
| 117th |
| Appointed to continue Harris's term.Elected in 2022 to finish Harris's term.[b] |
Jan 18, 2021 – present |
Democratic |
 Alex Padilla |
18 |
| 118th |
30 |
Elected to full term in 2022.[b] |
| Vacant |
Sep 29, 2023 – Oct 1, 2023 |
|
| 29 |
 Laphonza Butler |
Democratic |
Oct 1, 2023 – Dec 8, 2024 |
Appointed to continue Feinstein's term.Retired when her successor was elected, resigned early to give successor preferential seniority. |
| 30 |
 Adam Schiff |
Democratic |
Dec 8, 2024 – present[8] |
Appointed early to continue Feinstein's term, having already been elected to finish the term.[c] |
| Elected to full term in 2024.[c] |
31 |
119th |
| 120th |
| 121st |
31 |
To be determined in the 2028 election. |
| # |
Senator |
Party |
Years in office |
Electoral history |
T |
C |
T |
Electoral history |
Years in office |
Party |
Senator |
# |
| Class 1 |
Class 3 |