South Palm Beach is a town located in Palm Beach County, Florida, United States. The town is situated on a barrier island between the Atlantic Ocean and the Intracoastal Waterway. The entire town is approximately 5/8th of a mile (1 km) long along South Ocean Boulevard (Florida State Road A1A), its only street, and is bounded by the Town of Palm Beach to the north, and the Town of Lantana public beach to the south. As of 2004, the population recorded by the U.S.