|Namesake||City in Argentina.|
|Tribe Type||Starting tribe|
|Day Formed||Day 1|
|Tribe Status||Merged with Cordoba on Day 20|
|Lowest Placing Member||Unbornsavior (20/20)|
|Highest Placing Member||Claudiaprescot (Sole Survivor)|
Formosa is one of the starting tribes of Survivor: Argentina. Their tribe color is orange.
- »Unbornsavior - Also known as "Aaron" from Survivor: Peru
- »AlissaMarinxo - Also known as "Alissa" from Survivor: New Zealand
- Allyreyes - Also known as "Ally"
- Claudiaprescot - Also known as "Claudia"
- »Rainbowbadge - Also known as "Jake" from Survivor: Sichuan
- »Jennifer.mac.3 - Also known as "Jennifer" from Survivor: Sardinia
- MrSimtastic - Also known as "Joey"
- »TheFireJay - Also known as "Justin" from Survivor: Côte d’Ivoire
- ChronicMessiah - Also known as "Mackie"
- Brightney - Also known as "Sydney"
To be added after the season.