5 Districts (established in 2018)
- District I
- Kurt Rubin: 2019-present
- Scott Emanuelli: 2018-2019
- District II
- Glenn Powell: 2018-present
- District III*
- Grant Baglietto: 2020-present
- Bob Baglietto: 2018-2020
- District IV
- Brice Lauppe: 2018-present
- District V
- Chuck Schonauer - 2018-present
8 Districts (prior to 2018)
- District I
- Scott Emanuelli: 2017-2018
- Bill Suits: 2015-2017
- Ray Johnson: 2003-2015
- Archie Dessert: 1997-2003
- District II
- Mary Wadsworth: 2013-2018
- Glenn Powell: 2005-2013
- John Palmer: 2001-2005
- Tom Cherry: 1997-2001
- District III*
- Frank Saviez: 2003-2018
- Darrell Silveira: 1997-2003
- District IV*
- Tom Hearne: 2005-2018
- Francis Giudici: 1997-2005
- District V
- Bob Baglietto: 2006-2018
- Ken Jochimsen: 2001-2006
- Fred Costa: 1999-2000
- Robert Maulhardt: 1997-1999
- District VI
- Brice Lauppe: 2017-2018
- Jack De Wit: 1984-2017
- District VII
- Chuck Schonauer - 1997-2018
- District VIII*
- Glenn Hawes - 2005-2018
- Jay Dow - 2001-2005
- Glenn Hawes - 1997-2001
* These districts were merged with other districts in a bylaw amendment in September 2018; the current Directors at that time were appointed as At-Large Directors #3-5.
At-Large Appointed Directors
- At-Large 1
- Dan Howe: 2020-present
- Nathan Williams: 2019-2020
- Kurt Rubin: 2015-2019
- Dennis Smidt: 2014-2015
- Mary Wadsworth: 2006-2014
- Nathan Heeringa: 2003-2006
- Jim Wadsworth: 1999-2003
- At-Large 2
- Ann Walker:2022-present
- Nick Henning: 2020-2022
- Lance Atkins: 2016-2019
- Edward Eggers: 2009-2016
- Ron Rubin: 2005-2009
- Glenn Hawes: 2001-2005
- John Palmer: 1997-2001
- At-Large 3
- Frank Saviez: 2018-present
- At-Large 4
- Tom Hearne: 2018-present
- At-Large 5
- Glenn Hawes: 2018-present
Agency Appointed Directors
- Agricultural Commissioners
- Humberto Izquierdo: 2023-present
- Ed King: 2020-2023
- Greg Hinton: 2018-2020
- Jim Allan: 2016-2017
- Mark Quisenberry: 2010-2016
- Scott Hudson: 2010-2014
- Frank Carl: 1997-2010
- California Department of Food & Agriculture
- Brenda Lanini: 2019-present
- Carl Pfeiffer: 2017-2019
- John Heaton: 2006-2017
- Dave Godgrey: 2003-2006
- Umesh Kodira: 2002-2003
- Kathleen Harvey: 1997-2002
- UC Division of Agriculture & Natural Resources
- Mark Lundy: 2022-present
- Rachael Long: 2019-2022
- Shannon Mueller: 2009-2019
- Mick Canevari: 2003-2009
- Jack Williams: 2001-2003
- Lanny Lund: 1997-2001
- California Seed Association
- John Ellis: 2021-present
- Todd Rehrman: 2016-2020
- Ken Scarlett: 2011-2016
- John Palmer: 2008-2011
- Jeff Plourd: 2005-2008
- Ron Rubin: 1999-2005
- UCD Department of Plant Sciences (formerly Agronomy)
- Gail Taylor: 2018-present
- Joe DiTomaso: 2016-2018
- Chris van Kessel: 2003-2016
- Paul Gepts: 2000-2003
- Jim Hill: 1997-2003
- California Farm Bureau
- Chris Reardon: 2023-present
- Danny Merkley: 2022
- Rich Matteis: 2018-2022
- Andrea Fox: 2008-2017
- Emily Robidart: 2005-2008
- Karen Black: 2003-2005
- Cynthia Corey: 1997-2005
University Advisory Committee**
- UCD Seed Biotechnology Center
- Allen Van Deynze: 2019-present
- Sue DiTomaso: 2014-2019
- Kent Bradford: 1997-2014
- UCD College of Agriculture & Environmental Sciences
- Anita Oberbauer: 2018-present
- Ed Lewis: 2016-2018
- Jim Hill: 2009-2016
- Michael Parrella: 1999-2009
- Alan Bennett: 1997-1999
- UCD Foundation Seed Program
- Timothy Blank: 2022-present
- John Palmer: 2015-2022
- Bob Stewart: 2011-2015
- Chris van Kessel: 2009-2011
- Larry Teuber: 2002-2009
** These Director seats were changed to advisory positions in a bylaw amendment in September 2014.