Fisher Island is a census-designated place in Miami-Dade County, Florida, United States, located on a barrier island of the same name. Since 2015, Fisher Island has the highest per capita income of any place in the United States. As of the 2020 census, the population was 561. Named for automotive parts pioneer and beach real estate developer Carl G. Fisher, who once owned it, Fisher Island is three miles off the shore of mainland South Florida. No road or causeway connects to the island, which is only accessible by private boat, helicopter, or ferry. Once a one-family island home of the Vanderbilts, and later several other millionaires, it was sold for development in the 1960s. The property sat vacant for well over 15 years before development began for very limited and restrictive multi-family use. History Fisher Island was separated from the barrier island which became Miami Beach in 1905, when Government Cut was dredged across the northern end of the island. Construction of Fisher Island began in 1919 when Carl G. Fisher, a land developer, purchased the property from businessman and real estate developer Dana A. Dorsey, southern Florida's first African-American millionaire. In 1925 William Kissam Vanderbilt II traded a luxury yacht to Fisher for ownership of the island. After Vanderbilt's death in 1944, ownership of the island passed to U.S. Steel heir Edward Moore. Moore died in the early 1950s, and Gar Wood, the millionaire inventor of hydraulic construction equipment, bought it. Wood, a speedboat enthusiast, kept the island a one-family retreat. In 1963, Wood sold to a development group that included local Key Biscayne millionaire Bebe Rebozo, Miami native and United States Senator George Smathers, and then former U.S. Vice President Richard Nixon, who had promised to leave politics. During his subsequent presidency from 1968 to 1973, and during the Watergate scandal, Nixon maintained a home on nearby Key Biscayne known as the "Key Biscayne Whitehouse" that was the former residence of Senator Smathers and next door to Rebozo, but none of the three ever resided on Fisher Island. The Rosenstiel School of Marine and Atmospheric Science (RSMAS) of the University of Miami maintained the Comparative Sedimentology Laboratory on Fisher Island from 1972 to 1990 under the leadership of Robert Ginsburg. After years of legal battles and changes in ownership, further development on the island was finally started in the 1980s, with architecture matching the original 1920s Spanish