In the 2020 redistricting cycle, the district was redrawn to cover inland counties of DeSoto, Glades, Hardee, Hendry, Highlands, and Okeechobee, as well as most of Polk County (including Bartow, eastern Lakeland, and Winter Haven) and some of Immokalee in Collier County.

From 2013 to 2023, the district was located in the Treasure Coast and contained the whole of St. Lucie County and Martin County as well as the northeastern part of Palm Beach County, and included Port St. Lucie, Fort Pierce, Stuart, and Jupiter, as well as Treasure Coast International Airport.

The 18th district was created as a result of the redistricting cycle after the 1980 census.

In its final configuration as a South Florida district, it included portions of Miami-Dade and Monroe counties.

The Monroe County section of the district included all of the Florida Keys.