Since voters adopted Measure V, the creation of the county charter, in March 2002, vacancies on the Board of Supervisors have been filled by special election.
January 28, 2003, Third District special election The first special election used to fill a vacancy on the Orange County Board of Supervisors was held on January 28, 2003. Third District Supervisor
Todd Spitzer had resigned on November 19, 2002, in preparation for taking office as a member of the
California State Assembly on December 2 to replace the
term-limited Bill Campbell. Campbell, in turn, easily won the special election to fill the remaining two years of Spitzer's term.
February 6, 2007, First District special election The second special election used to fill a vacancy on the Orange County Board of Supervisors was held on February 6, 2007. First District Supervisor
Lou Correa had resigned on December 4, 2006, when he took office as a member of the
California State Senate to replace the
term-limited Joe Dunn.
Garden Grove City Councilwoman Janet Nguyen won the special election to fill the remaining two years of the term by seven votes over
Garden Grove Unified School District Boardmember Trung Nguyen (no relation) after a protracted recount battle (ironically, Correa had defeated
Assemblywoman Lynn Daucher for the Senate seat after a protracted recount battle, as well). Both Nguyens had unexpectedly finished ahead of the
front-runners, recently retired
State Assemblyman Tom Umberg and
Santa Ana City Councilman Carlos Bustamante.
June 8, 2010, Fourth District special election The third special election used to fill a vacancy on the Orange County Board of Supervisors was held on June 8, 2010, and was consolidated with the regular primary election for the next term for the seat. Fourth District Supervisor
Chris Norby had resigned on January 29, 2010, when he took office as a member of the
California State Assembly to replace
Mike Duvall, who had resigned from the Assembly in the wake of a lobbyist sex scandal.
Fullerton City Councilman Shawn Nelson won the seat by 12% over
Anaheim City Councilman Harry Sidhu. While Nelson won the special election to fill the remaining seven months of Norby's term, the special election was consolidated with the regular primary election, so Nelson and Sidhu advanced to a November run-off election to win the four-year term due to begin in January 2011. Nelson won the election for the 2011–2015 term by a 63%–37% margin, and would go on to hold the position until January 2019.
January 27, 2015, First District special election The fourth special election used to fill a vacancy on the Orange County Board of Supervisors was held on January 27, 2015. First District Supervisor
Janet Nguyen had resigned on December 1, 2014, when she took office as a member of the
California State Senate to replace the
term-limited Lou Correa. Coincidentally, Nguyen had been elected as First District Supervisor in a February 6, 2007, special election to replace Correa, who had resigned when he took office as a member of the California State Senate to replace the term-limited
Joe Dunn. Former
Garden Grove City Councilman Andrew Do, Nguyen's supervisorial Chief of Staff, won the special election to fill the remaining two years of the term by 43 votes over Correa.
March 12, 2019, Third District special election The fifth special election used to fill a vacancy on the Orange County Board of Supervisors was held on March 12, 2019. Third District Supervisor
Todd Spitzer had resigned on January 7, 2019, when he took office as
District Attorney of Orange County after defeating incumbent
Tony Rackauckas.
Irvine Mayor
Donald P. Wagner won the seat by 5% over former Congresswoman
Loretta Sanchez.
Candidates •
Donald P. Wagner (Republican) •
Loretta Sanchez (Democratic) • Kristine "Kris" Murray (Republican) • Larry Bales (Republican) • Deborah Pauly (Republican) • Kim-Thy "Katie" Hoang Bayliss (Republican) • Katherine Daigle (Republican)
Results March 9, 2021, Second District special election The sixth special election used to fill a vacancy on the Orange County Board of Supervisors was held on March 9, 2021. Second District Supervisor
Michelle Steel had resigned on January 3, 2021, when she took office as a member of the
United States House of Representatives after defeating incumbent
Harley Rouda.
Costa Mesa Mayor
Katrina Foley won the seat by 12% over former State Senator
John Moorlach.
Candidates •
Katrina Foley (Democratic) •
John Moorlach (Republican) • Kevin Muldoon (Republican) • Michael Vo (Republican) • Janet Rappaport (Democratic)
Results ==Special districts==