Florida City is a city in Miami-Dade County, Florida, United States. It is the southernmost municipality in the South Florida metropolitan area. Flo…Florida City is a city in Miami-Dade County, Florida, United States. It is the southernmost municipality in the South Florida metropolitan area. Florida City is primarily a Miami suburb and a major agricultural area. As of the 2020 census, it had a population of 13,085, up from 11,245 in 2010.