High Quality Content by WIKIPEDIA articles! Fisher Island is a neighborhood of metropolitan Miami, Florida, located on a barrier island of the same name. As of the 2000 census, Fisher Island had the highest per capita income of any place in the United States in 2000. The CDP had only 218 households and a total population of 467 persons. A relatively small part of the northern part of the island is incorporated as a part of the city of Miami Beach.