The second-longest-serving mayor was Henry Kiel, who served 12 years and nine days over three terms in office.

The shortest-serving mayor was Arthur Barret, who died 11 days after taking office.

St. Louis was incorporated as a city on December 9, 1822, four months after Missouri was admitted as a state to the Union.

In accordance with its new charter, the city changed its governance to a mayor-council format and elected its first mayor, William Carr Lane, on April 7, 1823.

The candidates are selected through a combined approval voting primary, with the top two advancing to the general.