The mayor is elected for four years during the general municipal election, which is held every two years on the first Tuesday after the first Monday in April. The candidates are selected through a combined
approval voting primary, with the top two advancing to the general. The mayor is usually sworn during the first session of the Board of Aldermen two weeks after the election. Under the original
city charter, the mayor was elected to a one-year term. Terms became two years under the 1859 city charter. The mayor's office was extended to its present four-year term after passage of the Charter and Scheme in 1876 which separated the City of St. Louis from
St. Louis County. ==Succession==