Rio Sidra is a densely populated island town in the San Blas Archipelago of the Kuna Yala comarca (indigenous province) of Panama.

Among the native Guna population, the island is called, Urgandi.

The island is 1 kilometre (0.6 mi) off Panama's north coast.

Rio Sidra is a municipality or corregimiento of Narganá.

This article about the geography of Guna Yala is a stub.