Port St. Lucie, Florida is 4.7 times larger than Pompano Beach, Florida.
Area: 63 km2 calculated
Pompano Beach is a city in Broward County, Florida, United States, along the coast of the Atlantic Ocean just to the north of Fort Lauderdale. The nearby Hillsboro Inlet forms part of the Atlantic Intracoastal Waterway. Wikipedia
Area: 295 km2 calculated
Port St. Lucie is a city in St. Lucie County, Florida, United States. The population of Port St. Lucie was 164,603 at the 2010 census due to its rapid growth during the 2000s. In 2013 the State of Florida estimated the City's population at 171,016. Port St. Wikipedia