Treasure Island
- County:
- Pinellas County
- County Seat:
- No
- Area (mi²):
- 1.546
- State:
- Florida
Treasure Island is a city located in Pinellas County, Florida. Treasure Island has a 2026 population of 6,524. Treasure Island is currently declining at a rate of -0.58% annually and its population has decreased by -0.78% since the most recent census, which recorded a population of 6,575 in 2020.