Treasure Island is a city in Pinellas County, Florida, United States.

The area of Treasure Island was originally settled in small communities by the Tocobaga around 300 AD.

The Timucua traded with other Native American tribes in the area until the arrival of Pánfilo de Narváez in 1528.

De Narváez decimated the indigenous people before leaving the area in search of gold.

[citation needed] Treasure Island got its name early in the 20th century, after several property owners attempted to boost sales of the properties being developed on the island by first burying and then pretending to discover a couple of wooden chests on the beach around 1915.

Treasure Island saw a surge in residential and hotel construction following World War II through the 1950s.

Artificial extensions of the land were created, which were usually designed for convenient access to navigable waterways like Boca Ciega Bay.