The park is named after Jonathan Dickinson, a Quaker merchant who was shipwrecked in 1696, with his family and others, on the Florida coast near the present-day park. He wrote a journal describing their encounters with local tribes, and their journey up the coast to St. Augustine.
A man known as Trapper Nelson homesteaded on the banks of the Loxahatchee River in the 1930s, living off the land trapping and selling furs. He soon became known as the Wildman of the Loxahatchee. After he died in 1968 the state acquired his land, and deeded it to the park. The site can only be reached by boat.
The United States Army established Camp Murphy, a top-secret radar training school, in the area that is now the park, in 1942. The camp included over 1,000 buildings, and housed more than 6,000 officers and soldiers. The camp was deactivated in 1944, after only two years of operation. Most of the camp buildings were torn down, but some of the building foundations remain. The property was transferred to the State of Florida in 1947, and opened as a state park in 1950.
