South Palm Beach is a town located in Palm Beach County, Florida, United States. The town is part of the Miami metropolitan area of South Florida and situated on a barrier island between the Atlantic Ocean and the Intracoastal Waterway. The entire town is approximately 5⁄8 of a mile (1.0 km) long along South Ocean Boulevard, its only street. It is between the Town of Palm Beach to the north and the Town of Lantana and its public beach to the south.

Palm Beach County is a county in the southeastern part of Florida, located in the Miami metropolitan area. It is Florida's third-most populous county after Miami-Dade County and Broward County and the 26th-most populous in the United States, with 1,492,191 residents as of the 2020 census. Its county seat and largest city is West Palm Beach, which had a population of 117,415 as of 2020. Named after one of its oldest settlements, Palm Beach, the county was established in 1909, after being split from Miami-Dade County. The county's modern-day boundaries were established in 1963.