Isla San Diego is a small island in Mexico in the southern Gulf of California.

Administratively it belongs to the municipality of Comondú[1] of the State of Baja California Sur and is very close to the small island called Isla La Habana.

It is barren and uninhabited, is located about 22 km (13.7 mi) east of the coast of Baja California, 9.5 km (5.9 mi) north of San Jose Island and 6 km (3.7 mi) south-southeast of the island of Santa Cruz.

Isla San Diego is 1.5 km (0.93 mi) long, up to 500 m (546.8 yd) wide and has an area of 0.563 km2 (139.1 acres).

This article about a location in the Mexican state of Baja California Sur is a stub.