Board of Supervisors  1855-1885 | 1885-Present
Redistricting years shaded yellow.

Year	Districts
	1	2	3	4	5
Jan 1885	Henry Dusterberry	Thomas Molloy	Bart Morgan	J.J. Hanifin	W.S. Pelouze
Jan 1887	Henry Dusterberry	D. Martin	Bart Morgan	J.J. Hanifin	W.S. Pelouze
Jan 1889	Hiram Bailey	D. Martin	Bart Morgan	D. C. Brown	W.S. Pelouze
Jan 1893	Hiram Bailey	D. Martin	Bart Morgan	J. Plunkett	W.S. Pelouze
Sep 1894	Hiram Bailey	D. Martin	Bart Morgan	J. Johnston	W.S. Pelouze
Jan 1895	Hiram Bailey	J. R. Talcott	W.H. Church	J. Johnston	W.S. Pelouze
Jan 1897	Thomas D. Wells	J. R. Talcott	W.H. Church	Charles Roeth	John Mitchell
Jan 1901	C.F. Horner	J. R. Talcott	W.H. Church	D. Rowe	John Mitchell
Jan 1903	C.F. Horner	J. R. Talcott	Joseph M. Kelley	D. Rowe	John Mitchell
Jan 1907	C.F. Horner	W.B. Bridge	Joseph M. Kelley	D. Rowe	John Mitchell
Jan 1909	C.F. Horner	W.B. Bridge	Joseph M. Kelley	F.W. Foss	John F. Mullins
Jan 1911	D.J. Murphy	W.B. Bridge	Joseph M. Kelley	F.W. Foss	John F. Mullins
Jan 1915	D.J. Murphy	Charles W. Heyer	Joseph M. Kelley	F.W. Foss	John F. Mullins
Jan 1917	D.J. Murphy	Charles W. Heyer	William Hamilton	F.W. Foss	John F. Mullins
Jan 1919	D.J. Murphy	Charles W. Heyer	William Hamilton	Redmond C. Staats	John F. Mullins
Jan 1921	D.J. Murphy	Charles W. Heyer	William Hamilton	Redmond C. Staats	John F. Mullins
Jan 1925	Ralph V. Richmond	Charles W. Heyer	William Hamilton	Redmond C. Staats	John F. Mullins
Jan 1929	Ralph V. Richmond	Charles W. Heyer	William Hamilton	Redmond C. Staats	Melvin Davis
Nov 1932	Ralph V. Richmond		William Hamilton	Redmond C. Staats	Melvin Davis
Jan 1933	Ralph V. Richmond		William Hamilton	Thomas E. Caldecott	Clifford Wixson
Apr 1933	Ralph V. Richmond	George Janssen	William Hamilton	Thomas E. Caldecott	Clifford Wixson
May 1937	George Hellwig	George Janssen	William Hamilton	Thomas E. Caldecott	Clifford Wixson
Nov 1938	George Hellwig	George Janssen		Thomas E. Caldecott	Clifford Wixson
Jan 1939	George Hellwig	George Janssen	Harry Bartell	Thomas E. Caldecott	Clifford Wixson
Jan 1945	Chester Stanley	George Janssen	Harry Bartell	Thomas E. Caldecott	Clifford Wixson
Jan 1951	Chester Stanley	George Janssen	Harry Bartell		Clifford Wixson
Nov 1951	Chester Stanley	George Janssen	Harry Bartell	Kent D. Pursel	Clifford Wixson
Jun 1954	Chester Stanley	George Janssen	Harry Bartell	Kent D. Pursel
Jan 1955	Chester Stanley	Francis Dunn	Leland W. Sweeney	Kent D. Pursel	Emanuel P. Razeto
Nov 1960		Francis Dunn	Leland W. Sweeney	Kent D. Pursel	Emanuel P. Razeto
Dec 1960	John D. Murphy	Francis Dunn	Leland W. Sweeney	Kent D. Pursel	Emanuel P. Razeto
Jan 1963	John D. Murphy	Robert E. Hannon	Leland W. Sweeney	Kent D. Pursel	Emanuel P. Razeto
Aug 1967	John D. Murphy	Robert E. Hannon	Leland W. Sweeney		Emanuel P. Razeto
Sep 1967	John D. Murphy	Robert E. Hannon	Leland W. Sweeney	Joseph P. Bort	Emanuel P. Razeto
Jan 1971	John D. Murphy	Robert E. Hannon	Fred F. Cooper	Joseph P. Bort	Emanuel P. Razeto
Jan 1973	John D. Murphy	Robert E. Hannon	Fred F. Cooper	Joseph P. Bort	Tom Bates
Jan 1975	John D. Murphy	Charles Santana	Fred F. Cooper	Joseph P. Bort	Tom Bates
Dec 1976	John D. Murphy	Charles Santana	Fred F. Cooper	Joseph P. Bort	John George
Jan 1977	Valerie Raymond	Charles Santana	Fred F. Cooper	Joseph P. Bort	John George
Jan 1981	Don Excell	Charles Santana	Fred F. Cooper	Joseph P. Bort	John George
Dec 1984	Edward Campbell	Charles Santana	Fred F. Cooper	Joseph P. Bort	John George
Jan 1985	Edward Campbell	Charles Santana	Fred F. Cooper	Robert Knox	John George
Jun 1986	Edward Campbell	Charles Santana	Don Perata	Robert Knox	John George
Jan 1989	Edward Campbell	Charles Santana	Don Perata	Mary V. King	Warren Widener
Jun 1991	Edward Campbell	Bill J. Aragon	Don Perata	Mary V. King	Warren Widener
Jul 1992	Edward Campbell	Gail Steele	Don Perata	Mary V. King	Warren Widener
Jan 1993	Edward Campbell	Gail Steele	Don Perata	Mary V. King	Keith Carson
Jan 1995	Edward Campbell	Gail Steele	Wilma Chan	Mary V. King	Keith Carson
Jan 1997	Scott Haggerty	Gail Steele	Wilma Chan	Mary V. King	Keith Carson
Dec 2000	Scott Haggerty	Gail Steele	Alice Lai-Bitker	Mary V. King	Keith Carson
Jan 2001	Scott Haggerty	Gail Steele	Alice Lai-Bitker	Nate Miley	Keith Carson
Jan 2011	Scott Haggerty	Nadia Lockyer	Wilma Chan	Nate Miley	Keith Carson
Jun 2012	Scott Haggerty	Richard Valle	Wilma Chan	Nate Miley	Keith Carson
Jan 2021	David Haubert	Richard Valle	Wilma Chan	Nate Miley	Keith Carson
Nov 2021 - Present	David Haubert	Richard Valle	Dave Brown	Nate Miley	Keith Carson