Kirk William Caldwell is an American politician who served as the mayor of Honolulu, Hawaii, from 2013 to 2021. A member of the Democratic Party, Caldwell also held the position of acting mayor in 2010 following the resignation of Mayor Mufi Hannemann. Caldwell announced that he would be running for the Democratic nomination in the 2022 Hawaii gubernatorial election in September 2021, but withdrew the following May.