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,[citation needed] 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.

It has some famous inhabitants such as Boris Becker, Andre Agassi and Caroline Wozniacki.