2018 San Francisco mayoral special election
Ed Lee, who was appointed Mayor of San Francisco in 2011 following Gavin Newsom's election as Lieutenant Governor of California, elected to a full term in 2011, and reelected in 2015, died of cardiac arrest on December 12, 2017. London Breed, the President of the San Francisco Board of Supervisors, became the city's acting mayor.
List of pre-statehood mayors of San Francisco
This is a list of tribal chiefs, alcaldes and mayors of San Francisco. California's first governor Felipe de Neve ordered all of the Missions to elect local Alcaldes (a combination of Mayor and Magistrate) around 1779.