Carter Henry Harrison IV was an American newspaper publisher and Democratic politician who served a total of five terms as mayor of Chicago but failed in his attempt to become his party's presidential nominee in 1904. Descended from aristocratic Virginia families and the son of five-term Chicago mayor Carter Harrison Sr., this Carter Harrison (IV) became the first native Chicagoan elected its mayor.

The mayor of Chicago is the chief executive of city government in Chicago, Illinois, the third-largest city in the United States. The mayor is responsible for the administration and management of various city departments, submits proposals and recommendations to the Chicago City Council, is active in the enforcement of the city's ordinances, submits the city's annual budget and appoints city officers, department commissioners or directors, and members of city boards and commissions.