| Cayo Agua Island | |
| Native Name: | Isla Cayo Agua |
| Map: | Central America |
| Coordinates: | 9.1333°N -84°W |
| Archipelago: | Bocas del Toro Archipelago |
| Area Km2: | 16 |
| Elevation M: | 0 |
| Country: | Panama |
| Country Admin Divisions Title: | Province |
| Country Admin Divisions: | Bocas del Toro |
| Country Admin Divisions Title 1: | District |
| Country Admin Divisions 1: | Bocas del Toro |
Cayo Agua (Water Cay) is the eastern and southernmost island in the Bocas del Toro Archipelago, Panama, separating Chiriquí Lagoon in the south from the Caribbean Sea in the north. It has a surface area of 16 km2.[1]