Myotis vivesi is found along the coast of the Gulf of California in the Mexican states of Sonora, Baja California and Baja California Sur, mostly on small islands. A small population exists on the Pacific coast of the Baja California peninsula, between Isla Encantada and Punta Coyote. Since it lives on small islands, the range of M. vivesi is naturally fragmented, but data from microsatellites and the mtDNA control region indicate that there is no isolation by distance in the species.
