Manalapan is a town in Palm Beach County, Florida, United States. The population was 406 at the 2010 United States census.
United States President Benjamin Harrison granted George H. K. Carter a homestead in 1889 on the yet unnamed land. In 1931, the sparsely populated settlement was incorporated by Harold Stirling Vanderbilt as the "Town of Manalapan". A large share of the first settlers being natives of Manalapan, New Jersey caused the name to be selected.
One of the most puzzling mysteries in Florida history was the disappearance of Circuit Judge Curtis Chillingworth and his wife Marjorie, who left a friend's home on the night of June 14, 1955, en route to their oceanfront cottage in Manalapan. It was established five years later that the couple were murdered by hitmen hired by one of Curtis Chillingworth's fellow judges. The Chillingworths were thrown overboard from a boat into the ocean with lead weights strapped to their legs; their bodies were never recovered.
The U.S. presidential yacht Sequoia was auctioned at the La Coquille Club in Manalapan on March 25, 1977 during the Carter administration, for US$286,000, as a symbolic cutback in Federal Government spending (annual cost to the U.S. Navy was $800,000) and to reduce signs of an "imperial presidency".
The popular tourist restaurant John G's moved to Manalapan in 2011 from its location in Lake Worth where it had been for 30+ years.
Manalapan is located at 26°33′52″N 80°02′36″W.
Manalapan is a small beach side community. It is bordered on the north by the bridge, beach access road and beach for the Town of Lantana, Florida; on the west by the intracoastal Waterway (known locally as Lake Worth Lagoon); on the south by the South Lake Worth Inlet (known locally as "Boynton Inlet"); and on the east by the Atlantic Ocean.
According to the United States Census Bureau, the town has a total area of 2.4 square miles (6.2 km2), of which 0.4 square miles (1.0 km2) is land and 2.0 square miles (5.2 km2) (81.48%) is water.