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Class 1
 John C. Frémont, serving from 1850-1851
- John B. Weller, serving from 1852-1857
- David C. Broderick, serving from 1857-1859
- Henry P. Haun, serving from 1859-1860
- Milton S. Latham, serving from 1860-1863
 John Conness, serving from 1863-1869
- Eugene Casserly, serving from 1869-1873
- John S. Hager, serving from 1873-1875
- Newton Booth, serving from 1875-1881
- John F. Miller, serving from 1881-1886
- George Hearst, serving from 1886-1886
- Abram P. Williams, serving from 1886-1887
- George Hearst, serving from 1887-1891
- Charles N. Felton, serving from 1891-1893
- Stephen M. White, serving from 1893-1899
- Thomas R. Bard, serving from 1900-1905
- Frank P. Flint, serving from 1905-1911
- John D. Works, serving from 1911-1917
- Hiram W. Johnson, serving from 1917-1945
- William F. Knowland, serving from 1945-1959
- Clair Engle, serving from 1959-1964
- Pierre E. G. Salinger, serving from 1964-1964
- George L. Murphy, serving from 1965-1971
- John V. Tunney, serving from 1971-1977
- S. I. Hayakawa, serving from 1977-1983
- Pete Wilson, serving from 1983-1991
- John Seymour, serving from 1991-1992
- Dianne Feinstein, serving from 1992-Present
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Class 3
- William M. Gwin, serving from 1850-1855, 1857-1861
- James A. McDougall, serving from 1861-1867
- Cornelius Cole, serving from 1867-1873
- Aaron A. Sargent, serving from 1873-1879
- James T. Farley, serving from 1879-1885
- Leland Stanford, serving from 1885-1893
- George C. Perkins, serving from 1893-1915
- James D. Phelan, serving from 1915-1921
- Samuel M. Shortridge, serving from 1921-1933
- William Gibbs McAdoo, serving from 1933-1938
- Thomas M. Storke, serving from 1938-1939
- Sheridan Downey, serving from 1939-1950
- Richard M. Nixon, serving from 1950-1953
- Thomas H. Kuchel, serving from 1953-1969
- Alan Cranston, serving from 1969-1993
- Barbara Boxer, serving from 1993-Present
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