West Palm Beach, Florida is 2.5 times larger than Manhattan (NYC borough).
Area: 59 km2 calculated
Manhattan is the most densely populated of the five boroughs of New York City. The borough is coterminous with New York County, an original county of the U.S. state of New York. 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