To understand how Peanut Island came to be, one must first understand the Lake Worth Lagoon and the changes it has undergone over the last two centuries. The area where Peanut Island currently sits was once a freshwater lake- Lake Worth. A stable inlet was built at the current location of the Lake Worth Inlet, and the subsequent intrusion of saltwater created a brackish water environment, creating the Lake Worth Lagoon. Navigation projects such as the creation of the Intercoastal Waterway (ICW) in the early 1900’s further increased salinity levels in the Lagoon. The Lake Worth Inlet is Florida’s easternmost point, meaning the Gulfstream current reaches closer here than anywhere in the world, bringing warm, clear waters into Peanut Island every day at high tide!
During the construction of the inlet, the need for an area to place the excavated dredge materials from the inlet led to Peanut Island’s creation in 1918. Originally named “Inlet Island,” the name changed to Peanut after plans to use the island as a terminal for shipping peanut oil. These plans were scrapped in 1946 but the name stuck.
For many years Peanut Island remained just a sand island full of Australian Pine trees, then in 1999, Palm Beach County created Peanut Island Park around the perimeter of the Island. In 2005 a $13 million renovation was completed, creating the lagoon areas, snorkel trail, docks, and other amenities such as restrooms and picnic areas.