Port St. Lucie, Florida is 2 times larger than West Palm Beach, Florida.
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
Area: 147 km2 calculated
West Palm Beach is a city in and the county seat of Palm Beach County, Florida, United States. The population was 101,043 at the 2010 census. It is the oldest large municipality in the South Florida metropolitan area, having been incorporated as a city two years before Miami. Wikipedia