2018 San Francisco mayoral special election
A special election was held for Mayor of the City and County of San Francisco on June 5, 2018. The winner of the election will serve until 2020, filling the unexpired term of Ed Lee, who was elected in 2011 and 2015, and died in office on December 12, 2017. Upon Lee's death, London Breed, President of the San Francisco Board of Supervisors, became Acting Mayor of San Francisco, but a vote of six supervisors replaced Breed with Supervisor Mark Farrell. The mayoral election was held concurrently with the statewide direct primary election. In San Francisco, the election for the eighth district member of the Board of Supervisors was also on the ballot.
Mayor of San Francisco
If the mayor dies in office, resigns, or is unable to carry out his/her duties and he/she did not designate an acting mayor, the president of the Board of Supervisors becomes acting mayor until the full Board select a person to fill the vacancy and finish the previous mayoral term. (In the case that both the president of the Board of Supervisors and the mayor are incapacitated, the order of succession is followed.) This has happened seven times: James Otis died in office and was succeeded by George Hewston, Eugene Schmitz was removed and succeeded by Charles Boxton, Charles Boxton resigned and was succeeded by Edward Robeson Taylor, James Rolph resigned and was succeeded by Angelo Rossi, George Moscone was assassinated and was succeeded by Dianne Feinstein, Gavin Newsom resigned and was succeeded by Ed Lee, and Lee died in office and was succeeded by Mark Farrell.