The Jacksonville City Council is the legislative governing body of the city of Jacksonville, Florida and of Duval County, with which the City of Jacksonville consolidated in 1968. The council meets in its chambers at Jacksonville City Hall, 117 W. Duval St. Under Florida's government transparency laws, all official council business must be conducted in meetings open to the public.

The Jacksonville City Council is composed of nineteen members who are elected for a four-year term and serve as part-time legislators. In May of each year, the Council elects a President and Vice President to serve one-year terms beginning the first of July. The current president is Randy White ((R) District 12)

The nineteen members are not all elected in the same manner; some are elected from districts, and others are elected at large. However, once elected, there is no distinction between council members elected at-large and from regular districts. Both have equal rights and responsibilities.

Duval County is divided into 14 districts; each of these districts elects a single council member who resides in the district. Like virtually all legislative districts at all levels in United States, these districts are redrawn every ten years following the decennial census.

In the early 1990s, voters approved an unusual residency requirement for "at-large" members. The county was divided into five special districts unrelated to any other districts, solely for the purpose of providing better representation for all geographical areas of Jacksonville. This was done because a trend had developed in which all five "at large" councilmembers actually resided in one small area of town. So under the current structure, at-large council members must reside in the special district for which they are running, but are elected by the voters of the county as a whole.

One at-large seat was vacated in 2007 because of a violation of this residency requirement; "Jay" Jabour was elected as the at-large councilman from the 2nd special district, but evidence later arose indicating that he actually lived in the 3rd special district. A judge subsequently invalidated the election, and the seat became vacant.

Currently the council has five Democrats and fourteen Republicans serving. This makes Jacksonville the most populous city in the United States with a majority Republican council.

The Council President assigns members to committees and to act as council liaisons.