Caño Island (Spanish: Isla del Caño) is a small island and biological reserve in the Bahia de Corcovado (Corcovado Bay) in Osa, Costa Rica.

It is on the Pacific Ocean side of Costa Rica, 10 miles (16 km) west of Punta Llorona on Península de Osa.

It rises steeply to a flat top of 123 metres (404 ft) in height.

Caño Island Biological Reserve (Spanish: Reserva Biológica Isla del Caño), is a protected area in Costa Rica, managed under the Osa Conservation Area, it was created in 1976 by decree 6385-A.

It is a popular tourist destination for ecotourism such as whale watching, attracting visitors for its beaches, coral beds, and sea life.