Fiesta Key is an island in the middle Florida Keys

Florida Keys

The Florida Keys are a coral archipelago in southeast United States. They begin at the southeastern tip of the Florida peninsula, about south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry...

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It is connected via causeway to U.S. 1

U.S. Route 1 in Florida

U.S. Route 1 in Florida runs along the state's east coast from Key West to its crossing of the St. Marys River into Georgia north of Boulogne, and south of Folkston. US 1 was designated through Florida when the U.S. Highway System was established in 1926.US 1 runs in the state of Florida, and...

 (or the Overseas Highway

Overseas Highway

The Overseas Highway is a highway carrying U.S. Route 1 through the Florida Keys. Large parts of it were built on the former right-of-way of the Overseas Railroad, the Key West Extension of the Florida East Coast Railway. Completed in 1912, the Overseas Railroad was heavily damaged and partially...

) at mile marker 70, near the eastern end of Long Key

Long Key

Long Key is an island in the middle Florida Keys.U.S. 1 crosses the key at approximately mile markers 65.5--71, between Fiesta Key and Conch Key....

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First recorded as Jew-Fish Kay (later Jewfish Key, then Jewfish Bush Key).
Louie Turner homesteaded the island, on January 7, 1908 becoming the first recorder owner.
For a period in the 1950s & 1960s, the key was owned by the Greyhound Bus Company. During that period it was named Tropical Key, then Greyhound Key.
Kampgrounds of America (KOA) bought the island from the Greyhound Company in 1966, renaming it 'Fiesta Key'.
The Cortex Resort Living arm of the Cortex Companies bought the 28 acres (113,312.1 m²) island in 2006 to build high-end vacation homes.